(a)

Connection required. The owner or occupant of any house, building or property used for human occupancy, employment, recreation or other purposes within the City of Mustang shall connect to and maintain use of the public water supply system and public sanitary sewer system at the owner or occupant's expense, unless excluded under section 118-7.

(b)

Maintenance of connection required. When any building, structure, facility, lot, parcel or tract of land has once been connected to the city water supply and public sanitary sewer system, it shall not be disconnected or use thereof discontinued until authorization has been secured from the city council for discontinuance.

(c)

Permit required. No connection shall be made to the public water supply system or the public sanitary sewer system without the owner or occupant first obtaining a utility connection permit from the office of the chief building official. The application fees to be paid for a utility connection permit shall be as set out in section 42-118. An application fee shall not be charged for temporary water flow meter permits.

(d)

Connection fees.

(1)

Fees shall be collected for each new user of the water and/or sewer system. The purpose of the connection fees is to defray costs incurred by the city in expanding and operating the water and sewer utility systems. The fees for single-family, commercial and industrial users shall be as set forth in section 42-118. Multifamily structures and mobile home parks will be charged an additional amount per dwelling unit as set forth in section 42-118 in addition to the connection fee, based on the size of the water meter as provided in this chapter.

(2)

The connection fees imposed by subsection (b)(1) of this section shall be deposited into the trust fund upon receipt. On an annual basis, 33⅓ percent of the connection fees will be budgeted and appropriated for expenses of operating and maintaining the water and sewer utilities system, and 66⅔ percent of the connection fees will be budgeted and appropriated for the purposes of expanding and upgrading the water and sewer utilities as capital improvements to the utilities system.

(Ord. No. 1276, § 3, 10-4-2022)

Editor's note— Ord. No. 1276, § 3, adopted October 4, 2022, amended § 18-1 in its entirety to read as herein set out. Former § 18-1, pertained to permit for connection to water or sewer system; connection fee, and derived from § 15.20.050 of the 1977 Code; Ord. No. 1048, § 1, 9-21-2010; Ord. No. 1106, § 2, 8-19-2014.

(a)

Security deposits, transfer fees, and application.

(1)

Every consumer applying for water, sewer, and/or trash collection service shall be required to make a security deposit to guarantee payment of utility service to each location served. The amount of such security deposit shall be as set forth in section 42-118. A written receipt for the security deposit shall be issued to the consumer.

(2)

The security deposit shall be considered only as a guarantee of the payment of the utility service account and shall not relieve the consumer of the obligation of paying all service charges when the same are due. Security deposits may be applied to the payment of defaulting or delinquent utility service accounts of the consumer who made the deposit, to include sewer, water, and trash collection services.

(3)

If a service account is terminated at the request of the consumer prior to the establishment of a good payment relationship, which consists of no late payments for a period of one year, the balance of the security deposit in excess of all unpaid utility service charges due the city shall be returned to the consumer. Only the principal amount of the security deposit shall be returned to the consumer. A late payment shall be defined as being those payments made 30 or more days past the due date.

(4)

No security deposit shall be required of:

a.

The United States government;

b.

The state or any agency or governmental subdivision thereof; or

c.

Any victim of certain crimes under and in compliance with 11 O.S. § 35-107.

(5)

A transfer fee of $25.00 will be charged for transfer of an account to a different address. An account must be in a current status prior to requesting a transfer of deposit and service at a new location.

(b)

Utility billing.

(1)

Due to the growth of the City of Mustang and the increased number of utility accounts, cycle billing is implemented within the City of Mustang. The billing calendar shall be approved by the city manager.

(2)

Bills will be mailed each month per the billing calendar and shall be due not earlier than 20 days from the bill date. For public entities, the due date for payment of the utility bills shall be within ten days after the first regularly scheduled meeting of the governing body of the public entity following the city mailing of the bill per the billing calendar approved by the city manager or 20 days after the bill date, whichever is later; provided, that a letter from the public entity establishing such payment schedule is on file with the city clerk and approved by the city manager.

(3)

Utility bills that are not paid by the due date will be considered delinquent and service will be interrupted and the meter locked as provided in section 118-3. An administrative fee of $25.00 shall be added to any utility bill which is not paid before the cut-off date in any cut-off notice, whether service is discontinued or not.

(4)

Any utility service that has been interrupted or discontinued as a result of non-payment or other reason shall not relieve the owner or occupant from the obligation to obtain and maintain utility service as provided in section 118-1(a).

(Ord. No. 1088, § 2, 7-2-2013; Ord. No. 1106, § 3, 8-19-2014; Ord. No. 1276, § 4, 10-4-2022; Ord. No. 1286, § 1, 6-6-2023)

(a)

Utility bills that are not paid by the due date will be considered delinquent, and service will be interrupted and the meter locked 48 hours after disconnect. A notice of intent to interrupt service shall be mailed to the customer at least eight calendar days prior to the cut-off. The notice shall advise the customer of the cut-off date, and contain provisions for an opportunity for hearing before the city manager or his/her designee. To have service restored, the bill and any related fees must be paid in full. Services which were disconnected for delinquent or non-payment will only be restored during the normal working hours, Monday through Thursday between 8:00 a.m. and 5:30 p.m., and Friday between 8:00 a.m. and 11:30 a.m. If payment is made before the close of business, water service shall be restored the same day.

(b)

Any time that the city is required to or does disconnect a water meter on a customer's property, an administrative fee in the amount of $25.00 shall be added to the customer's utility bill. Where the customer's service has been disconnected four or more times during the prior 12 months, a chronic disconnect fee of $75.00 shall be added to the customer's utility bill.

(c)

If a water meter is pulled, as authorized by the Mustang Code of Ordinances or by state law, a pull meter fee in the amount of $40.00 shall be charged to the account.

(d)

Customers having difficulty paying their utility bill may arrange for a deferred payment agreement no more than three times in a 12-month period and only prior to actual cut-off of service. Customers must come to the utility billing office to sign a deferral agreement.

(e)

If outstanding utility bills have not been paid before the cut-off date and time, then utility service will be discontinued and the meter may be locked within approximately 48 hours. Utility services shall only be discontinued Monday through Thursday between 8:00 a.m. and 5:30 p.m., and Friday between 8:00 a.m. and 11:30 a.m.

(f)

If utility services are restored on the basis of a check which is returned for any cause determined to be the fault of the customer, the utility service may be discontinued again and the meter locked and the services will not be restored until a cash payment in the amount of the returned check plus any related fees is made, together with a reconnection fee of $25.00.

(g)

If any lock is broken or removed in order to turn on water services to the premises after service has been discontinued due to nonpayment, a broken/disconnected lock fee of $110.00 will be added to the delinquent amount for the cost of the lock and a fee for service, and the meter shall remain locked until all charges and penalties are paid. This provision shall be applicable in addition to any other penalties, charges or fines which may apply and be imposed.

(h)

When a meter is found that has been tampered with, in any manner, the meter may be pulled and a meter reset fee of $40.00 will be assessed before a new meter is installed. Guaranteed monies in the form of cash, cashier's check or money order shall be required, and all past due account balances shall be paid in full prior to water service being restored. This provision shall be applicable in addition to any other penalties, charges or fines which may apply and be imposed.

(i)

When a meter is found that has a broken curb stop, a fee of $40.00 will be assessed before a new meter is installed or the broken meter repaired. This provision shall be applicable in addition to any other penalties, charges or fines which may apply and be imposed.

(j)

Should any water or sewer customer cease to be a customer by reason of moving or leaving the district where the city has jurisdiction, and be indebted to the city for water or sewer service in any amount, such customer may not receive service again, should he so apply, until all amounts due the city for previous service are paid.

(k)

Delinquent utility accounts will be sent for collection with prior approval by the city council. Customers shall be responsible for the costs of collection services as provided in section 2-176 of the Mustang Code of Ordinances.

(l)

A late fee of $15.00 shall be imposed for failure to pay fees for sanitation service when due. Interest at the rate of five percent shall be charged on the unpaid balance for utility services after 5:00 p.m. on the due date.

(m)

When a meter has been previously removed, and a replacement meter is installed by someone other than the city, an improper meter fee in the amount of $100.00 will be assessed and the replacement meter removed by the city. The replacement meter fee and all past due account balances shall be paid in full with guaranteed monies in the form of cash, cashier's check or money order prior to water service being restored. This provision shall be applicable in addition to any other penalties, charges or fines which may apply and be imposed.

(n)

A customer may request that any water meter be physically read, tested, or recalibrated. A fee in the amount of $15.00 shall be charged for any meter calibration.

(o)

Where a lock has been removed from a water meter, or a water meter has otherwise been tampered with, or premises have been connected to the city's water supply system by any means after such supply has been shut off by the city, including, but not limited to, by by-passing the water meter, an illegal hook-up fee in the amount of $100.00 shall be charged to the customer's account. The water service shall be disconnected, and water service shall not be restored until all charges and penalties are paid. This provision shall be applicable in addition to any other penalties, charges or fines which may apply and be imposed.

(p)

Where a water meter has been removed by the city and service disconnected, and water service is restored by installing a water meter that was removed from another location, the water meter shall be removed and an illegal water meter fee of $200.00 shall be charged to the customer's account. The water service shall not be restored until all charges and penalties are paid. This provision shall be applicable in addition to any other penalties, charges or fines which may apply and be imposed.

(q)

Any person, firm, or corporation who willfully fails to pay for sanitation services used, or made available, when the same has become over-due by at least 60 days, shall be guilty of an offense. Upon conviction for the offense of willful failure to pay a utility bill for sanitation services used or made available, the person convicted, shall be fined in accordance with section 1-8 of the Mustang Code of Ordinances.

(r)

Any person removing or causing to be removed a lock from a water meter, or tampering or causing to be tampered with a water meter or connecting premises to the city's water supply system after it has been shut off by the city, shall be guilty of an offense and, upon conviction, shall be fined in accordance with section 1-8 of the Mustang Code of Ordinances. For purposes of this section, each instance of removing or causing to be removed a lock from a water meter, or tampering or causing to be tampered with a water meter, shall constitute a separate offense.

(s)

Single-family dwelling residential water meters may be ordered shut off and/or locked during periods of water rationing or to respond to or prevent abuse or waste.

(t)

In addition to the remedies set forth herein, the city reserves and retains the right to pursue any other remedies available under federal, state or local law to enforce the terms and provisions applicable to utility services or redress violations of federal, state or local law.

(Ord. No. 1048, § 2, 9-21-2010; Ord. No. 1088, § 1, 7-2-2013; Ord. No. 1106, § 4, 8-19-2014; Ord. No. 1196, § 1, 12-3-2019; Ord. No. 1276, § 5, 10-4-2022)

Editor's note— Section 1 of Ord. No. 1088, adopted July 2, 2013, amended and renumbered the former § 118-2 as § 118-3.

(a)

Rates for water service. The City of Mustang shall charge and collect for water service at the rates set by resolution adopted by the city council.

(b)

Adjustments to water rates. Water rates shall increase in each subsequent year by two percent or the consumer price index as published by the CPI Index for All Urban Consumers (CPI-U) South - Size Class B/C, whichever is greater. Rate increases shall be effective on October 1 of each subsequent year.

(c)

Water rate increase for third-party purchases. The City of Mustang purchases some of its water from the City of Oklahoma City. In the event the City of Oklahoma City increases the rate charged to the City of Mustang for water, the rates set forth in subsection (b) shall be increased pro rata based on the projected volume that the purchased water bears to the projected total volume of water used in the City of Mustang. It is the City of Mustang's intention to pass along any future rate increase for third-party purchases of water proportionately across the total volume of water that the City of Mustang provides to its consumers.

(Ord. No. 1106, § 5, 8-19-2014; Ord. No. 1276, § 6, 10-4-2022)

Beginning October 1, 2014, the City of Mustang shall charge and collect for utility service furnished to all consumers and users a monthly capital improvement fee in the amount of $4.50 per month for each utility account. All amounts collected from such capital improvement charge shall be applied to water and wastewater facility and line maintenance and construction.

(Ord. No. 1106, § 6, 8-19-2014)

(a)

Every consumer applying for a temporary water flow meter shall be required to complete an application on a form determined by the finance director, and submit a deposit in the amount of $1,600.00, for each requested meter.

(b)

Permits for temporary water flow meters shall be valid for a period not to exceed six months. Temporary water flow meters shall be returned to the city at the end of the permit period.

(c)

Temporary water flow meters must be returned to the utility department between the twentieth through 27th of each month for a meter reading. Failure to return a meter during this period for a monthly reading will result in a penalty of $50.00 for each missed month. If a temporary water flow meter is not returned for a monthly reading, a minimum usage of 100,000 gallons will be billed to the consumer in addition to the penalty.

(d)

The consumer will be billed on a monthly basis for water usage at rates established by the city from time to time. Monthly billing will be based upon either (1) the monthly meter readings; or (2) if the meter is not returned for a monthly reading, a minimum usage of 100,000 gallons will be billed to the consumer in addition to the penalty referenced in paragraph (c). If a temporary water flow meter is not returned for a reading for three consecutive months, the deposit will be forfeited, the customer will be billed for 100,000 gallons for each month, and the permit will be canceled and the account closed.

(e)

If a temporary water flow meter is lost or stolen, the consumer shall notify the city as soon as practical. For lost or stolen meters, the deposit shall be retained by the city and the minimum usage of 100,000 gallons will be billed to the consumer for the applicable month and the account will be closed.

(f)

The consumer is responsible for the temporary flow meter. Upon return of a temporary water flow meter, the security deposit will be credited to the consumer, less any amounts to cover the anticipated cost of necessary repairs, on the final water bill. Only the principal amount of the security deposit shall be credited to the consumer. Any refund owed to the consumer shall be mailed to consumer at the billing address.

(g)

Temporary water flow meters shall at all times be and remain the property of the city, and shall be returned to the city if found or recovered by any person.

(h)

No person shall be eligible for a temporary water flow meter permit if such person has previously obtained a permit and failed to return the temporary water flow meter on two or more occasions within the previous five years.

(i)

Any person connecting a temporary water flow meter to the public water supply system without a valid and current permit shall be guilty of an offense and, upon conviction, shall be fined in accordance with section 1-8 of the Mustang [Code of] Ordinances. For purpose of this section, each instance of connection without a valid and current permit shall constitute a separate offense.

(Ord. No. 1106, § 7, 8-19-2014; Ord. No. 1130, § 1, 8-18-2015; Ord. No. 1210, § 1, 11-3-2020; Ord. No. 1298, § 1, 2-6-2024)

(a)

Required connection to the public water supply set forth in section 118-1(a) shall not apply to:

(1)

A single-family residence outside of a platted subdivision unless a water main is located within 300 feet of any part of the lot, parcel or tract of land along a street, easement or right-of-way.

(2)

A single-family residence constructed in a previously platted subdivision which provided for private water wells in lieu of public water supply.

(3)

In subdivisions where the developer is not required to connect to public water supply under section 106-447(a).

(b)

Required connection to the public sanitary sewer system set forth in section 118-1(a) shall not apply to:

(1)

A single-family residence outside of a platted subdivision unless a public sanitary sewer is located on any street, easement or right-of-way abutting the lot, parcel or tract of land.

(2)

A single-family residence constructed in a previously platted subdivision which provided for private sewage disposal systems in lieu of connection to the public sanitary sewer system.

(3)

In subdivisions where the developer is not required to connect to the public sanitary sewer system under section 106-366.

(Ord. No. 1276, § 7, 10-4-2022)

The city may ration outdoor water usage to its residents and water customers upon the terms and conditions stated in this division. For purposes of this division, water rationing shall be defined to mean all outdoor water usage by residents and other water customers of the city. Without limitation, it shall include water used for the purpose of filling swimming pools, all watering of shrubs, flowers and grasses, whether used from a handheld hose or sprinkler system or device, and the watering of lawns, flowerbeds and fields of any kind, and the washing of cars or other vehicles, including recreational vehicles and trailers. It shall not include water obtained form privately owned water wells.

(Ord. No. 691, § 1(9.80), 7-14-1998)

The city manager, or in his absence the acting city manager, is authorized to impose water rationing and levels thereof when he determines, within his discretionary authority, that such rationing is necessary in the interests of the health, safety and welfare of the public. Such rationing shall be effective and enforceable upon notice to residents and other water customers by the city.

(Ord. No. 691, § 1(9.82), 7-14-1998)

Notification to the cable television media by the city manager's office of the imposition of water rationing and the levels thereof and publication by the cable television media 12 hours prior to the imposition of rationing shall constitute adequate notice of water rationing, and such rationing shall be effective and enforceable thereafter. In addition, at the time of the imposition of water rationing, the city shall make reasonable attempts to notify all other available media sources of the water rationing; however, failure to do so or failure of the media to publicize such rationing shall have no effect on the imposition of the rationing or the enforceability thereof.

(Ord. No. 691, § 1(9.84), 7-14-1998)

(a)

There shall be four levels of water rationing, as follows:

(1)

Level 1: Voluntary. Water rationing shall be voluntary and water usage shall be based upon an odd/even system of watering.

(2)

Level 2: Mandatory. Water rationing shall be mandatory and water usage shall be based upon an odd/even system of watering, except for commercial car washing facilities and businesses, which are only subject to Level 4.

(3)

Level 3: Mandatory. No outdoor water usage is permitted, except for commercial car washing facilities and businesses, which are only subject to Level 4.

(4)

Level 4: Mandatory. No water usage is permitted. Commercial car washing facilities and businesses will not be excepted from water rationing.

(b)

Conditions. The following conditions shall apply:

(1)

Odd/even system. Occupants of houses, buildings or other structures with even-numbered addresses may water from 12:01 a.m. to 11:59 p.m. on even calendar days. Occupants of houses, buildings or other structures with odd-numbered addresses may water from 12:01 a.m. to 11:59 p.m. on odd calendar days. If water rationing at Level 1, 2 or 3 is in effect on the 31st day of any month, there will be no outdoor water usage, as set forth for Level 3.

(2)

Time limitations. Unless otherwise specified, watering may occur from 12:01 a.m. to 11:59 p.m. on the appropriate odd or even day. However, the city manager or the acting city manager reserves the right to restrict this time from 12:01 a.m. to 7:00 a.m. and from 8:00 p.m. to 11:59 p.m. if conditions so require and upon the giving of notice as stated in this division.

(3)

Responsibility for violations. Lawful occupants of houses, buildings or other structures, or, if unoccupied temporarily or permanently or if there are no habitable structures, then the owner of record, shall be deemed the responsible party for purposes of enforcement of this division. Observation by a law enforcement officer or city code inspector of improper water usage shall constitute prima facie evidence of a violation of this division.

(4)

Additional powers of city. Nothing in this division shall or is intended to supersede or repeal any provisions by which the city may impose other restrictions on the use of city water during emergencies, nor shall any provision of this division supersede or repeal any provisions or authority by which the city may, without notice, shut off the water supply to any premises for repairs, extensions, nonpayment of rates, or any other reason.

(Ord. No. 691, § 1(9.86), 7-14-1998)

The following words, terms and phrases, when used in this article, shall have the meanings ascribed to them in this section, except where the context clearly indicates a different meaning:

Approving authority means the city manager or his duly authorized representative.

BOD (biochemical oxygen demand) means the quantity of oxygen by weight, expressed in milligrams per liter, utilized in the biochemical oxidation of organic matter under standard laboratory conditions for five days at a temperature of 20 degrees Celsius.

Building sewer means the extension from the building drain to the public sewer or other place of disposal. The building sewer is also called the house lateral and house connection.

City means the City of Mustang or any authorized person acting in its behalf.

COD (chemical oxygen demand) is a measure of the oxygen-consuming capacity of inorganic and organic matter present in the water or wastewater expressed in milligrams per liter as the amount of oxygen consumed from a chemical oxidant in a specific test, but not differentiating between stable and unstable organic matter and thus not necessarily correlating with biochemical oxygen demand.

Control manhole means a manhole giving access to a building sewer at some point before the building sewer discharge mixes with other discharges in the public sewer.

Control point means a point of access to a course of discharge before the discharge mixes with other discharges in the public sewer.

Garbage means animal and vegetable wastes and residue from the preparation, cooking and dispensing of food, and from the handling, processing, storage and sale of food products and produce.

Industrial waste means waste resulting from any process of industry, manufacturing, trade or business or from the development of any natural resource, or any mixture of waste with water or normal wastewater or distinct from normal wastewater.

Industrial waste charge means the charge made on those persons who discharge industrial wastes into the city's sewer system.

Milligrams per liter (mg/l) means the same as parts per million and is a weight-to-volume ratio. The milligram-per-liter value multiplied by the factor 8.34 is equivalent to pounds per million gallons of water.

Natural outlet means any outlet into a watercourse, ditch, lake, or other body of surface water or groundwater.

Normal domestic wastewater means wastewater, excluding industrial wastewater, discharged by a person into sanitary sewers and in which the average concentration of total suspended solids is not more than 300 milligrams per liter and BOD is not more than 250 milligrams per liter.

Overload means the imposition of organic or hydraulic loading on a treatment facility in excess of its engineered design capacity.

pH means the logarithm (base 10) of the reciprocal of the hydrogen ion concentration.

Public sewer means a pipe or conduit carrying wastewater or unpolluted drainage in which owners of abutting properties shall have the use, subject to control by the city.

Sanitary sewer means a public sewer that conveys domestic wastewater or industrial wastes or a combination of both, and into which stormwater, surface water, groundwater and other unpolluted wastes are not intentionally passed.

Slug means any discharge of water, wastewater or industrial waste which, in concentration of any given constituent or in quantity of flow, exceeds for any period of duration longer than 15 minutes more than five times the average 24-hour concentration or flow during normal operation.

Standard Methods means the examination and analytical procedures set forth in the latest edition, at the time of analysis, of Standard Methods for the Examination of Water and Wastewater, as prepared, approved and published jointly by the American Public Health Association, the American Water Works Association, and the Water Pollution Control Federation.

Storm sewer means a public sewer which carries stormwater and surface water and drainage and into which domestic wastewater or industrial wastes are not intentionally passed.

Stormwater means rainfall or any other form of precipitation.

Superintendent means the water and wastewater superintendent of the city or his duly authorized deputy, agent or representative.

Suspended solids means solids, measured in milligrams per liter, that either float on the surface of or are in suspension in water, wastewater or other liquids, and which are largely removable by a laboratory filtration device.

To discharge includes to deposit, conduct, drain, emit, throw, run, allow to seep, or otherwise release or dispose of, or to allow, permit or suffer any of these acts or omissions.

Trap means a device designed to skim, settle or otherwise remove grease, oil, sand, flammable wastes or other harmful substances.

Unpolluted wastewater means water containing:

(1)

No free or emulsified grease or oil;

(2)

No acids or alkalis;

(3)

No phenols or other substances producing taste or odor in receiving water;

(4)

No toxic or poisonous substances in suspension, colloidal state or solution;

(5)

No noxious or otherwise obnoxious or odorous gases;

(6)

Not more than an insignificant amount, in milligrams per liter, each of suspended solids and BOD, as determined by the state water quality board; and

(7)

Color not exceeding 50 units as measured by the platinum-cobalt method of determination as specified in Standard Methods.

Waste means rejected, unutilized or superfluous substances in liquid, gaseous or solid form resulting from domestic, agricultural or industrial activities.

Wastewater means a combination of the water-carried waste from residences, business buildings, institutions and industrial establishments, together with any groundwater, surface water and stormwater that may be present.

Wastewater facilities includes all facilities for collecting, pumping, treating and disposing of wastewater and industrial wastes.

Wastewater service charge means the charge on all users of the public sewer system whose wastes do not exceed in strength the concentration values established as representative of normal wastewater.

Wastewater treatment plant means any city-owned facilities, devices and structures used for receiving, processing and treating wastewater, industrial waste and sludges from the sanitary sewers.

Watercourse means a natural or manmade channel in which a flow of water occurs, either continuously or intermittently.

(Code 1977, § 13.08.010)

Cross reference— Definitions generally, § 1-2.

(a)

Unless exception is granted by the approving authority, the public sanitary sewer system shall be used by all persons discharging:

(1)

Wastewater.

(2)

Industrial waste.

(3)

Polluted liquids.

(b)

Unless authorized by the state department of health, no person may deposit or discharge any waste included in subsection (a) of this section on public or private property into or adjacent to any:

(1)

Natural outlet.

(2)

Watercourse.

(3)

Storm sewer.

(4)

Other area within the jurisdiction of the city.

(c)

The approving authority shall verify, prior to discharge, that wastes authorized to be discharged will receive suitable treatment within the provisions of laws, regulations, ordinances, rules and orders of federal, state and local governments.

(Code 1977, § 13.08.100)

(a)

The superintendent and other duly authorized employees of the city bearing proper credentials and identification are entitled to enter any public or private property at any reasonable time for the purpose of enforcing this article.

(b)

Anyone acting under this authority shall observe the establishment's rules and regulations concerning safety, internal security and fire protection.

(c)

Except when caused by negligence or failure of the company to maintain safe conditions, the city shall indemnify the company against loss or damage to its property by city employees and against liability claims and demands for personal injury or property damage asserted against the company and growing out of the sampling operation.

(d)

The superintendent and other duly authorized employees of the city bearing proper credentials and identification are entitled to enter all private properties through which the city holds a negotiated easement for the purposes of:

(1)

Inspection, observation, measurement, sampling or repair;

(2)

Maintenance of any portion of the sewer system lying within the easements; and

(3)

Conducting any other authorized activity.

All activities shall be conducted in full accordance with the terms of the negotiated easement pertaining to the private property involved.

(e)

No person acting under authority of this section may inquire into any processes including metallurgical, chemical, oil refining, ceramic, paper or other industries beyond that point having a direct bearing on the kind and source of discharge to the public sewers.

(Code 1977, § 13.08.200)

(a)

The city may terminate water and wastewater disposal service and disconnect an industrial customer from the system when:

(1)

Acids or chemicals damaging to the sewer lines or treatment process are released to the sewer causing rapid deterioration of these structures or interfering with proper conveyance and treatment of wastewater;

(2)

A governmental agency informs the city that the effluent from the wastewater treatment plant is no longer of the quality permitted for discharge to a watercourse, and it is found that the customer is delivering wastewater to the city's system that cannot be sufficiently treated or requires treatment that is not provided by the city as normal domestic treatment; or

(3)

The industrial customer:

a.

Discharges industrial waste or wastewater that is in violation of the permit issued by the approving authority;

b.

Discharges wastewater at an uncontrolled variable rate in sufficient quantity to cause an imbalance in the wastewater treatment system;

c.

Fails to pay monthly bills for water and sanitary sewer services when due; or

d.

Repeats a discharge of prohibited wastes to public sewers.

(b)

If service is discontinued pursuant to subsection (a)(2) of this section, the city shall:

(1)

Disconnect the customer;

(2)

Supply the customer with the governmental agency's report and provide the customer with all pertinent information; and

(3)

Continue disconnection until such time as the industrial customer provides additional pretreatment or other facilities designed to remove the objectionable characteristics from his industrial wastes.

(Code 1977, § 13.08.210)

(a)

The city shall serve persons discharging in violation of this article with written notice stating the nature of the violation and providing a reasonable time limit for satisfactory compliance.

(b)

No person may continue discharging in violation of this article beyond the time limit provided in the notice.

(Code 1977, § 13.08.220)

A person who continues prohibited discharges is guilty of an offense.

(Code 1977, § 13.08.230)

(a)

General prohibitions. No person may discharge to public sewers any waste which by itself or by interaction with other wastes may:

(1)

Injure or interfere with wastewater treatment processes or facilities;

(2)

Constitute a hazard to humans or animals; or

(3)

Create a hazard in receiving waters of the wastewater treatment plant effluent.

(b)

Compliance with article. All discharges shall conform to the requirements of this article.

(c)

Discharge of septic tank waste.

(1)

No person may discharge any waste or material from septic tanks into the public sewers or into any other inlet whatsoever for treatment at the wastewater treatment plant.

(2)

Any violation of this subsection shall be punishable as provided in section 1-8. Each act of violation shall constitute a separate offense. For the purposes of this subsection, each act of discharging waste or material from septic tanks as described in this subsection shall constitute an act of violation.

(Code 1977, § 13.08.020)

(a)

No discharge to a public sewer may contain:

(1)

Cyanide greater than 0.05 milligrams per liter;

(2)

Fluoride other than that contained in the public water supply;

(3)

Chlorides in concentrations greater than 250 milligrams per liter;

(4)

Gasoline, benzene, naphtha, fuel oil or any other flammable or explosive liquid, solid or gas; or

(5)

Substances causing an excessive COD.

(b)

No waste or wastewater discharged to public waters may contain:

(1)

Strong acid, iron pickling wastes, or concentrated plating solutions, whether neutralized or not;

(2)

Fats, wax, grease or oils, whether emulsified or not, in excess of 100 milligrams per liter or containing substances which may solidify or become viscous at temperatures between 32 and 150 degrees Fahrenheit (zero and 65 degrees Celsius);

(3)

Objectionable or toxic substances exerting an excessive chlorine requirement to such degree that any such material received in the composite wastewater at the wastewater treatment works exceeds the limits established by the approving authority for such materials; or

(4)

Obnoxious, toxic or poisonous solids, liquids or gases in quantities sufficient to violate the provisions of section 118-101(a).

(c)

No waste, wastewater or other substance may be discharged into public sewers which has a Ph lower than 5.5 or higher than 9.5, or any other corrosive property capable of causing damage or hazard to structures, equipment and/or personnel at the wastewater facilities.

(d)

All waste, wastewater or other substances containing phenols, hydrogen sulfide, or other taste- and odor-producing substances shall conform to concentration limits established by the approving authority. After treatment of the composite wastewater, concentration limits may not exceed the requirements established by state, federal or other agencies with jurisdiction over discharges to receiving waters.

(Code 1977, § 13.08.030)

(a)

No discharges to the public sewers may contain concentrations of heavy metals greater than the amounts specified in subsection (b) of this section.

(b)

The maximum allowable concentrations of heavy metals, stated in terms of milligrams per liter, determined on the basis of individual sampling in accordance with Standard Methods, are as follows:

(1)

Arsenic, 0.05 mg/l.

(2)

Barium, 5.00 mg/l.

(3)

Boron, 1.00 mg/l.

(4)

Cadmium, 0.05 mg/l.

(5)

Chromium (total), 0.5 mg/l.

(6)

Copper, 0.1 mg/l.

(7)

Lead, 0.5 mg/l.

(8)

Manganese, 1.0 mg/l.

(9)

Mercury, 0.005 mg/l.

(10)

Nickel, 1.0 mg/l.

(11)

Selenium, 0.05 mg/l.

(12)

Silver, 0.1 mg/l.

(13)

Zinc, 1.0 mg/l.

(c)

No other heavy metals or toxic materials may be discharged into public sewers without a permit from the approving authority specifying conditions of pretreatment, concentrations, volumes and other applicable provisions.

(d)

Prohibited heavy metals and toxic materials include but are not limited to the following:

(1)

Antimony;

(2)

Beryllium;

(3)

Bismuth;

(4)

Cobalt;

(5)

Molybdenum;

(6)

Uranylion;

(7)

Rhenium;

(8)

Strontium;

(9)

Tellurium;

(10)

Herbicides;

(11)

Fungicides; and

(12)

Pesticides.

(Code 1977, § 13.08.040)

(a)

No person may discharge garbage into public sewers unless it is shredded to a degree that all particles can be carried freely under the flow conditions normally prevailing in public sewers. Particles greater than one-half inch in any dimension are prohibited.

(b)

The approving authority is entitled to review and approve the installation and operation of any garbage grinder equipped with a motor of three-fourths horsepower (0.75 hp metric) or greater.

(Code 1977, § 13.08.050)

(a)

No person may discharge to public sanitary sewers:

(1)

Unpolluted stormwater, surface water, groundwater, roof runoff or subsurface drainage;

(2)

Unpolluted cooling water;

(3)

Unpolluted industrial process waters; or

(4)

Other unpolluted drainage.

(b)

In compliance with statute, the approving authority may designate storm sewers and other watercourses into which unpolluted drainage described in subsection (a) of this section may be discharged.

(Code 1977, § 13.08.060)

No person may discharge to the public sewers any liquid or vapor having a temperature higher than 150 degrees Fahrenheit (65 degrees Celsius), or any substance which causes the temperature of the total wastewater treatment plant influent to increase at a rate of ten degrees Fahrenheit or more per hour, or a combined total increase of plant influent temperature to 110 degrees Fahrenheit.

(Code 1977, § 13.08.070)

(a)

No person may discharge radioactive wastes or isotopes into public sewers without the permission of the approving authority.

(b)

The approving authority may establish, in compliance with applicable state and federal regulations, regulations for discharge of radioactive wastes into public sewers.

(Code 1977, § 13.08.080)

(a)

No person may discharge into public sewers any substance capable of causing:

(1)

Obstruction to the flow in sewers;

(2)

Interference with the operation of treatment processes or facilities; or

(3)

Excessive loading of treatment facilities.

(b)

Discharges prohibited by subsection (a) of this section include but are not limited to materials which exert or cause concentrations of:

(1)

Inert suspended solids greater than 250 milligrams per liter, including but not limited to:

a.

Fuller's earth;

b.

Lime slurries; and

c.

Lime residues;

(2)

Dissolved solids greater than 500 milligrams per liter, including but not limited to:

a.

Sodium chloride; and

b.

Sodium sulfate;

(3)

Excessive discoloration, including but not limited to:

a.

Dye wastes; and

b.

Vegetable tanning solutions; or

(4)

BOD, COD or chlorine demand in excess of normal plant capacity.

(c)

No person may discharge into public sewers any substance that may:

(1)

Deposit grease or oil in the sewer lines in such a manner as to clog the sewers;

(2)

Overload skimming and grease handling equipment;

(3)

Pass to the receiving waters without being effectively treated by normal wastewater treatment processes due to the nonamenability of the substance to bacterial action; or

(4)

Deleteriously affect the treatment process due to excessive quantities.

(d)

No person may discharge any substance into public sewers which:

(1)

Is not amenable to treatment or reduction by the processes and facilities employed; or

(2)

Is amenable to treatment only to such a degree that the treatment plant effluent cannot meet the requirements of other agencies having jurisdiction over discharge to the receiving waters.

(e)

The approving authority shall regulate the flow and concentration of slugs when they may:

(1)

Impair the treatment process;

(2)

Cause damage to collection facilities;

(3)

Incur treatment costs exceeding those for normal wastewater; or

(4)

Render the waste unfit for stream disposal or industrial use.

(f)

No person may discharge into public sewers solid or viscous substances which may violate subsection (a) of this section if present in sufficient quantity or size, including but not limited to:

(1)

Ashes;

(2)

Cinders;

(3)

Sand;

(4)

Mud;

(5)

Straw;

(6)

Metal;

(7)

Shavings;

(8)

Glass;

(9)

Rags;

(10)

Feathers;

(11)

Tar;

(12)

Plastics;

(13)

Wood;

(14)

Unground garbage;

(15)

Whole blood;

(16)

Paunch manure;

(17)

Hair and fleshings;

(18)

Entrails;

(19)

Paper products, either whole or ground by garbage grinders;

(20)

Slops;

(21)

Chemical residues;

(22)

Paint residues; or

(23)

Bulk solids.

(Code 1977, § 13.08.090)

(a)

If discharges or proposed discharges to public sewers may deleteriously affect wastewater facilities, processes or equipment or receiving waters, create a hazard to life or health, or create a public nuisance, the approving authority shall require:

(1)

Pretreatment to an acceptable condition for discharge to the public sewers;

(2)

Control over the quantities and rates of discharge; and

(3)

Payment to cover the cost of handling and treating the wastes.

(b)

The approving authority is entitled to determine whether a discharge or proposed discharge is included under subsection (a) of this section.

(c)

The approving authority shall reject wastes when:

(1)

It determines that a discharge or proposed discharge is included under subsection (a) of this section; and

(2)

The discharger does not meet the requirements of subsection (a) of this section.

(Code 1977, § 13.08.110)

(a)

If pretreatment or control is required, the approving authority shall review and approve the design and installation of equipment and processes.

(b)

The design and installation of equipment and processes must conform to all applicable statutes, codes, ordinances and other laws.

(c)

Any person responsible for discharges requiring pretreatment, flow equalizing or other facilities shall provide and maintain the facilities in effective operating condition at his own expense.

(Code 1977, § 13.08.120)

(a)

Discharges requiring a trap include:

(1)

Grease or waste containing grease in excessive amounts;

(2)

Oil;

(3)

Sand;

(4)

Flammable wastes; and

(5)

Other harmful ingredients.

(b)

Any person responsible for discharges requiring a trap shall at his own expense and as required by the approving authority:

(1)

Provide equipment and facilities of a type and capacity approved by the approving authority;

(2)

Locate the trap in a manner that provides ready and easy accessibility for cleaning and inspection; and

(3)

Maintain the trap in effective operating condition.

(Code 1977, § 13.08.130)

Any person responsible for discharges through a building sewer carrying industrial wastes shall, at his own expense and as required by the approving authority:

(1)

Install an accessible and safely located control manhole;

(2)

Install meters and other appurtenances to facilitate observation, sampling and measurement of the waste; and

(3)

Maintain the equipment and facilities.

(Code 1977, § 13.08.140)

(a)

Sampling of wastewater shall be conducted according to customarily accepted methods, reflecting the effect of constituents upon the sewage works and determining the existence of hazards to health, life, limb and property, and shall be conducted in accordance with the standard methods of sampling effluents and wastewater which are employed by the state department of health.

(b)

Examination and analyses of the characteristics of waters and wastes required by this article shall be:

(1)

Conducted in accordance with the latest edition of Standard Methods; and

(2)

Determined from suitable samples taken at the control manhole provided or other control point authorized by the approving authority.

(c)

BOD and suspended solids shall be determined from composite sampling, except to detect unauthorized discharges.

(d)

The city may select an independent firm or laboratory to determine flow, BOD and suspended solids.

(e)

The city is entitled to select the time of sampling at its sole discretion so long as at least annual samples are taken.

(Code 1977, § 13.08.150)

(a)

Persons making discharges of industrial waste shall pay a charge to cover the cost of collection and treatment.

(b)

When discharges of industrial waste are approved by the approving authority, the city or its authorized representative shall enter into an agreement or arrangement providing for:

(1)

Terms of acceptance by the city; and

(2)

Payment by the person making the discharge.

(Code 1977, § 13.08.160)

(a)

A person discharging industrial wastes into public sewers prior to the effective date of the ordinance codified in this article may continue without penalty so long as he:

(1)

Does not increase the quantity or quality of discharge without permission of the approving authority;

(2)

Has discharged the industrial waste at least 12 months prior to the effective date of the ordinance codified in this article; and

(3)

Applies for and is granted a permit no later than 365 days after the effective date of the ordinance codified in this article.

(b)

The city may grant such a permit provided that the person:

(1)

Submits an application within 180 days after the effective date of the ordinance codified in this article on forms supplied by the approving authority;

(2)

Secures approval by the approving authority of plans and specifications for pretreatment facilities when required; and

(3)

Has complied with all requirements for agreements or arrangements, including but not limited to provisions for:

a.

Payment of charges;

b.

Installation and operation of pretreatment facilities; and

c.

Sampling and analysis to determine quantity and strength; and

(4)

Provides a sampling point subject to the provisions of this article and approval of the approving authority.

(c)

A person applying for a new discharge shall:

(1)

Meet all conditions of subsection (a) of this section; and

(2)

Secure a permit prior to discharging any waste.

(Code 1977, §§ 13.08.180, 13.08.190)

(a)

Requirements. Backflow prevention valves shall be required on all new residential, commercial, industrial, and public building structures, and for new hookups to public sewer of existing residential, commercial, industrial, and public building structures.

(b)

Regulations and standards. The city engineer shall establish appropriate requirements, regulations, and standards for backflow prevention valves.

(c)

Exceptions. The community development director, or his designee, shall retain the discretionary authority to make exceptions to this requirement if it is determined that a backflow prevention valve is not appropriate to a particular structure and/or would not substantially serve the purpose of aiding in the prevention of sewer backups for a particular structure. In such cases, the community development director, or his designee, shall issue a written exception to this requirement.

(d)

Requirement applicability. This requirement shall be effective for all designated structures for which building permits are issued after the effective date of this section.

(Ord. No. 768, § 1, 2-6-2001)

The user charge shall be determined for any industrial user connecting to the city sanitary sewer system and shall be based on the actual cost of treatment based on quantity and quality of waste product, in accordance with regulations of the Environmental Protection Agency.

(Code 1977, § 13.08.170(A))

At least biannually, the city council shall review total operation and maintenance costs of the treatment works and set sewer user fees to recover all such costs. Operation and maintenance costs shall include replacement of the treatment works. For the purpose of providing funds for the maintenance of the sanitary sewage system of the city and for other purposes, each respective user thereof shall pay a domestic wastewater user's charge based on the following formula:

(Code 1977, § 13.08.170(B))

The sewer costs shall be prorated to all domestic and commercial users on the basis of water consumed by the users during the three winter months using the following formula:

(Code 1977, § 13.08.170(C))

(a)

Sewer charge. The sewer user charge shall be based upon the quantity of water used or consumed by said premise or facility therein or thereon as the same is measured by the water meters in use. The sewer user charge as of October 1, 2021 shall be $5.69 per 1,000 gallons of water as determined from the meter records of the City of Mustang.

(b)

Adjustment to sewer charge. Sewer rates shall increase in each subsequent year by two percent or the consumer price index as published by the U.S. Department of Labor for the South Region - Size Class B/C, whichever is greater. Rate increases shall be effective on October 1 of each subsequent year beginning October 1, 2022.

(Code 1977, § 13.08.170(D); Ord. No. 1022, § 2, 5-19-2009; Ord. No. 1106, § 7, 8-19-2014; Ord. No. 1276, § 7, 10-4-2022)

Residential sewer user charges shall be calculated in the following manner:

(1)

A "winter period consumption base" shall be calculated for each residential or housekeeping unit. Said consumption base shall be the average amount of the water consumed each period by a residential or housekeeping unit during the three billing cycles which occur between December 1 and March 1 this will represent the bills mailed on or about December 15, January 15 and February 15, which should reflect water used or consumed in the month of November, December and January. The "winter period consumption base" shall be recalculated annually and shall become effective after the last billing period of the above described three-month base setting months. The domestic sewer user charge shall be calculated based on current rate per 1,000 gallons of the "winter period consumption base."

(2)

If a property owner having responsibility for sewer charges, directly or through a third-party manager, leases, rents or otherwise makes their residential or housekeeping unit available for occupancy by a third person(s), they will be charged the current sewer rate per thousand gallons based on the higher of 7,500 gallons per month or actual water consumption per month.

(3)

Any customer relocating within the service area during or after his winter period consumption base has been established shall be charged on the basis of his previously established winter period consumption base at his previous premises or facility, or a non-winter month consumption base shall be established at the customer's new residential or housekeeping unit as stated in subsection (2) of this section until such time as a new winter period consumption base is established for the new residential or housekeeping unit. The city shall determine which base will provide a reasonable sewer charge for the customer's new residential or housekeeping unit.

(4)

Water used from private sources shall be metered as required in this section, and the sewer service charges shall be billed accordingly.

(5)

If a lot, parcel of land, premises or facility discharging sewage, water or other liquids directly into the city's sewer system is supplied either in whole or in part with water from wells or any sources other than the city, then such well or other source of supply shall be registered with the city, and if the water from the well or other supply is not measured by a water meter, the owner or occupant shall, at his own cost, install and maintain a meter on the supplies in such a location and in such a manner as is satisfactory to the city. These meters shall serve as a control for the establishment of the sewer service charge and shall be read as provided by subsection (1) of this section. If, at the option of the customer, the installation of a meter would be impractical, water consumption will be estimated at 7,500 gallons per month per residential or housekeeping unit.

(6)

The basis for determining the sewer user charge shall be reviewed as needed and shall be adjusted to reflect any increase or decrease in wastewater treatment costs based on previous experience.

(7)

Any commercial or industrial sewer user installing a meter to measure its actual sewer flow shall be charged the current rate per 1,000 gallons of actual sewage flow.

(8)

For residential users establishing new service that do not have a "winter period consumption base" established at their current residential or housekeeping unit, water consumption will be estimated at the following rates until a winter period consumption base is established for the user at the residential or housekeeping unit:

(Code 1977, § 13.08.170(E); Ord. No. 632, § 2, 3-7-1995; Ord. No. 1022, § 3, 5-19-2009; Ord. No. 1106, § 8, 8-19-2014; Ord. No. 1154, § 1, 10-17-2017; Ord. No. 1276, § 9, 10-4-2022)

(a)

Resident sewer users shall be charged a minimum sewer charge regardless of use which shall be $9.51 based upon a minimum water consumption of 2,000 gallons.

(b)

The city does not obligate itself to furnish sanitary sewer service to any person whomsoever, but will furnish such service as is reasonable within its financial ability to do so.

(Code 1977, § 13.08.170(F); Ord. No. 1022, § 4, 5-19-2009; Ord. No. 1106, § 9, 8-19-2014)

If a user of the sanitary sewer system does not use city water, but depends wholly or in part on wells or other private water supplies, estimated water consumption, as set forth in section 118-135(5), shall determine the amount of water used for the purpose of computing the sewer service charge, or such user may install a meter acceptable to the city, and the readings thereof shall govern.

(Code 1977, § 13.08.170(G))

Billings for sewer service shall be rendered at the same time and on the same bills issued for water service, but shall be shown as a separate item from the charge for water. If sewer service is commenced or terminated during a billing period, the charge may be prorated on a daily basis.

(Code 1977, § 13.08.170(H))

The sewer service charge shall be due and payable from and after the date on the bill on which such charge is shown. Payment shall be made to the city, but the city may, at its option, accept payment for any sewer service charge without payment of the water bill on which the charge is shown, and may, at its option, accept payment of any water bill without payment also of any sewer service charge shown thereon.

(Code 1977, § 13.08.170(I))

All deposits made by users of city water as required to guarantee payment of water bills may also be applied to pay delinquent or defaulting sewer service charges of the user who made the deposit.

(Code 1977, § 13.08.170(J))

Failure to pay a sewer service charge in accordance with this division shall be cause for discontinuing and disconnecting the water connection. In addition, the city may utilize any remedy provided under section 118-3, undertake any other appropriate method for collection of delinquent charges, and pursue any remedy authorized by law.

(Code 1977, § 13.08.170(K); Ord. No. 1276, § 10, 10-4-2022)

(a)

All fire hydrants shall be Mueller A-423 Super Centurion, American - Darling B-84-B, M and H Styles 129 and Clow Medallion, and dry-top traffic model design, conforming to the AWWA C-502-80 standard. Hydrants shall be round-valved bell compression type (open against—closed with pressure) with two, 2½-inch nozzles and one 4½-inch steamer nozzle. Nozzle threads shall be national standards. All fire hydrants shall be single barrel for four feet bury and 5¼-inch valve opening, six-inch mechanical joint. All fire hydrant extensions shall be at the contractor's expense. All operating nuts and nozzle cap nuts shall be 1½-inch pentagon. All nozzles shall be equipped with chained caps, provided with gaskets made of suitable plastic or neoprene. O-ring seals and oil sealed ball bearings may be used in place of AWWA packing gland and multiple packing rings. All threads shall be used between the valve and the tee.

(b)

Fire hydrants shall be classified in accordance with their rated gallons per minute (gpm) capacities, using data from actual flow testing of the hydrant after installation, as follows:

(1)

Class AA—Rated capacity of 1,500 gpm or greater.

(2)

Class A—Rated capacity of 1,000—1,499 gpm.

(3)

Class B—Rated capacity of 500—999 gpm.

(4)

Class C—Rated capacity of less than 500 gpm.

(c)

Fire hydrants shall come from the hydrant manufacturer powder coated in safety yellow. The tops and nozzle caps shall be painted after installation with the following capacity-indicating color scheme:

(1)

Class AA—Light blue;

(2)

Class A—Green;

(3)

Class B—Orange;

(4)

Class C—Red.

Fire hydrants that are inoperative or unusable shall be marked as "out of service" until the hydrant is either repaired or removed from service.

(d)

The back side of the hydrant opposite the pipe shall have concrete blocking. Blocking is to be formed and poured in place. Blocking is to be from hydrant to undisturbed soil. The back side of the tee fitting coming off the main line shall also be blocked. When soil is soft and unstable a clamping device shall be used. Blocking or clamping is to be in accordance with the standard detail drawing.

(e)

Around the drain of the hydrant shall be placed not less than five cubic feet of crushed stone or gravel. Backfill around the hydrant shall be firmly tamped to the surface of the ground to a distance of five feet in front of the hydrant and back of the hydrant to the end of the hydrant trench excavation.

(Ord. No. 1213, § 1, 1-5-2021)

This standard covers the installation of pressure class 200 PVC (SDR-21) and Schedule 40 pipe complying with AWWA standards.

(Code 1977, § 13.20.010)

The following words, terms and phrases, when used in this division, shall have the meanings ascribed to them in this section, except where the context clearly indicates a different meaning:

Contractor means the person entering into the contract with the owner for the installation of PVC (SDR-21 Schedule 40) water pipe and fittings.

Engineer means the person or government agency acting for the owner as his duly authorized agent within the scope of the duties entrusted.

Inspector means an authorized representative of the city or the engineer representing the owner to make any and all necessary inspections of the work performed, materials and equipment furnished by the contractor.

Owner means the person or government subdivision entering into contract with the contractor for the installation of the PVC water pipe and accessories.

Whenever in the specifications or drawings the words "directed," "required," "permitted," "ordered," "designated," "prescribed" or words of like import are used, it shall be understood that a direction, requirement, permission, order, designation or prescription of the engineer is intended, and similarly, the words "approved," "accepted," "acceptable," "satisfactory" or words of like import shall mean approved by, or acceptable or satisfactory to, the engineer, unless otherwise expressly stated.

(Code 1977, § 13.20.020)

Cross reference— Definitions generally, § 1-2.

Within the city when PVC water pipe is used, Class C-900 shall be used for all 12-inch water lines. All water lines of ten-inch through six-inch PVC shall be SDR-21 200 PSI, and all water lines from four inches through three-fourths inch shall be Schedule 40. When 12-inch C-900 PVC water lines are used under streets, highways, driveways and crosses water lines they shall be encased in ductile iron pipe as required by AWWA standards. All crossings shall be placed as indicated in the adopted ductile water line standards.

(Code 1977, § 13.20.030)

The contractor shall be responsible for all material furnished by him and shall replace at his own expense all such materials found damaged or defective in manufacture. This shall include the furnishing of all material and labor required for the replacement of installed material discovered defective prior to the final acceptance of the work.

(Code 1977, § 13.20.040)

All pipe shall be laid to and maintained at the required lines and grades approved by the city. Fittings, valves, air vents and fire hydrants shall be installed at the required locations with valve and hydrant stems plumb. No deviation shall be made from the approved line or grade without approval in writing from the city engineer or the chief building official.

(Code 1977, § 13.20.050)

Temporary support, adequate protection and maintenance of all underground and surface utility structures, drains, sewers and other structures encountered in the progress of the work shall be furnished by the contractor at his own expense. The contractor shall be responsible to call Oklahoma One-Call System at 1-800-522-6543, 48 hours prior to any excavation. The contractor shall bear all expense arising from obstructions encountered. All pipe shall be laid to a depth of three feet, six inches cover, the depth of cover shall be measured from the established street grade or the top of curb, whichever is the highest. In no case shall hydrants be set lower than four feet.

(Code 1977, § 13.20.060)

The trench shall be dug to the required alignment and depth as shown on the approved plans. Where necessary to prevent caving, trench excavation in unstable soil shall be adequately supported. As backfill is placed and sheeting is withdrawn, the void left by the withdrawn sheeting shall be filled and compacted before withdrawing the next increment. The trench bottom shall be constructed to provide a firm, stable and uniform support for the full length of the pipe. In no case shall the trench be excavated deeper than to allow the required cover of three feet six inches. When an unstable subgrade condition is encountered and, in the opinion of the city engineer or chief building official, it cannot support the pipe, an additional depth shall be excavated and refilled and compacted and approved by the city engineer and/or the chief building official. Bell holes at each joint location shall be provided to permit the joint to be made properly and to lay properly.

(Code 1977, § 13.20.070)

Ledge rocks, boulders and large stones shall be removed to provide six inches of soil cushion on each side of and below all PVC pipe and accessories. Blasting for excavation will have to be cleared and approved by the fire department. Blasting will only be allowed when no other process of rock removal is available and practical.

(Code 1977, § 13.20.080)

All excavated material shall be stockpiled in a manner that will not endanger the work and that will void obstructing sidewalks and driveways. Hydrants under pressure, valve pit covers, valve boxes or other utility controls shall be left unobstructed and accessible until the work is completed. Gutters shall be kept clear or other satisfactory provisions made for street drainage, and natural watercourses shall not be obstructed.

(Code 1977, § 13.20.090)

(a)

All pipes, fittings, valves, hydrants and accessories shall be carefully placed into the trench using suitable equipment in such a manner as to prevent damage to pipes and fittings. Under no circumstances shall the pipes or accessories be dropped or dumped into the trench.

(b)

All pipes and accessories shall be inspected for defects prior to placement into the trench. All defective, damaged or unsound material shall be repaired or replaced as directed by the city engineer or chief building official.

(c)

All foreign matter or dirt shall be removed from the interior of the pipes before lowering them into position in the trench.

(Code 1977, § 13.20.100)

(a)

The sealing surface of the pipe, the bell to be joined and the elastomeric gaskets shall be cleaned immediately before assembly. When pipe laying is not in progress, the open ends of installed pipe shall be closed to prevent entrance of trench water into the pipe. Whenever water is excluded from the interior of the pipe, enough backfill shall be placed on the pipe to prevent floating. Any pipe that has floated shall be removed from the trench and the bedding restored. No pipe shall be laid when the trench conditions or the weather is unsuitable for proper installation as determined by the city engineer or chief building official.

(b)

The pipe shall be cut in a neat and workmanlike manner without damage to the pipe so as to have a smooth end at right angles to the axis of the pipe.

(Code 1977, § 13.20.110)

(a)

Valves, hydrants or fittings connected to PVC plastic pipe shall be equipped with bells having a profile that permits a seal to be made directly between the pipe end and the bell of the fitting with an elastomeric gasket.

(b)

Pipe ends shall be cut square, deburred and beveled in accordance with manufacturer standards.

(c)

The push on joints is an elastomeric gasketed joint. It is assembled by positioning the elastomeric gaskets in the annular grooves of the bell or coupler and inserting the spigot end of the pipe into the bell or coupler. The spigot end of the pipe compresses the gasket radially to form a positive seal. The gasket and annular groove are designed, sized and shaped so that the gasket will resist displacement. Care shall be taken so that only the correct elastomeric gasket, compatible with the annular groove, must be in accordance with the manufacturer's recommendations.

(d)

The mechanical joint is a bolted joint of the stuffing box type. Each joint shall consist of:

(1)

A bell provided with an exterior gland having bolt holes or slots and a socket with an annular recess for the sealing gasket and the spigot end of the plastic pipe;

(2)

A sealing gasket;

(3)

A follower gland with bolt holes matching those in the fitting; and

(4)

Tee bolts and hexagonal nuts.

(Code 1977, § 13.20.120)

(a)

Air valves shall be furnished and installed complete in place with all appurtenances, in sizes, number and arrangement as approved for installation at each specified location. Air valves shall be designed for a working pressure of not less than 150 pounds per square inch. The air valve shall be completely automatic in operation. Complete construction and installation drawings, specifications, descriptive data, photographs, operating characteristics and capacities shall be submitted to the city engineer or the chief building official for approval prior to purchase and installation.

(b)

Air valves, regardless of type, shall be designed for maximum durability and minimum of maintenance. The valves seats, pivots, levers, air orifices, floats (unless made of glass), bearing guides, tailrods, guide bushings, and all other moving and rubbing surfaces and parts, shall be made of monel metal, silicon bronze, phosphorus bronze or other equally durable and corrosion resisting metal, as approved by the city engineer or chief building official.

(c)

Check valves shall be cast iron bodies with full bronze mountings and conform to current AWWA/ANSI standards.

(Code 1977, § 13.20.120)

All fire hydrants shall comply with the requirements of section 118-171 of this chapter.

(Code 1977, § 13.20.140; Ord. No. 730, § 1(13.20.140(B)), 4-4-2000; Ord. No. 1050, § 1, 9-7-2010; Ord. No. 1167, § 3, 7-3-2018; Ord. No. 1184, § 1, 3-5-2019; Ord. No. 1213, § 2, 1-5-2021)

Plugs shall be inserted into the bells of all dead end fittings. Spigot ends of accessories and fittings and plain ends of plastic pipe shall be capped, except as otherwise provided by the city water system policy. A reaction of trust blocking shall be provided at all dead ends of pipe that are capped or plugged.

(Code 1977, § 13.20.150; Ord. No. 1184, § 3, 3-5-2019)

Service connections for all pipe diameter and classes may be made by means of a suitable saddle, tapped coupling or service connector for plastic pipe.

(Code 1977, § 13.20.160)

(a)

All PVC water lines shall be tested by means of hydrostatic pressure of not less than 100 pounds per square inch for three hours. If test plugs are used, they shall be furnished and installed by the water line contractor at his own expense, together with all necessary anchors, braces and other devices necessary to withstand the hydrostatic pressure on such plug without placing any hydraulic thrust on the pipe line or any part thereof. The contractor shall be solely responsible for any and all damages to the pipe line and public and private property which might be caused by the failure of such test plugs or supports thereof. The allowable leakage shall not exceed ten gallons per 24 hours per inch diameter per mile of 42 inches and smaller pipe; and 7½ gallons on 48-inch pipe and larger.

(b)

After the section of line to be tested has been filled with water, the specified test pressure shall be applied by means of a force pump of such design and capacity that such pressure can be applied and maintained for the duration of the test period, which shall not be less than three hours for 24 inches and smaller pipe.

(c)

All water supplied to the line, after the initial filling thereof, shall be metered by means of a tested water meter as furnished and installed by the city.

(d)

Any and all leaks as evidenced by visual inspection of the soil at any point on the line constructed by the contractor, which appear during the specified hydrostatic test or at any subsequent time before final acceptance of the whole works, shall be located and repaired by and at the expense of the contractor.

(Code 1977, § 13.20.170)

(a)

Before being placed into service, all new water lines shall be disinfected by adding chlorine to the water to bring the strength up to 50 ppm and let stand in the lines for a period of four hours. The line shall then be drained and flushed. The disinfection of the water lines shall be done under the supervision of the water department or the city engineer.

(b)

Water samples will be collected and tested by the state health department and found safe for human consumption before lines are turned into system.

(Code 1977, § 13.20.180)

Where the drawings do not show a profile or indicate cut, the cover on the pipe shall be three feet six inches below the top of the curb, or where there is no curb, three feet six inches below the established grade of the centerline of the street. The minimum cover shall be not less than two feet below the bottom of the ditch at crossings or parallel runs.

(Code 1977, § 13.20.190)

All Class 200-900-40 water (PVC) pipe shall be bedded in sand, except under the following conditions. The following three material classifications will be allowed as bedding materials when the soil type has been classified by an approved testing laboratory:

(1)

Class I. Angular, one-fourth to 1½ inches (six to 40 mm) graded stone, including a number of fill materials that have regional significance such as coral, slag, cinders, crushed shell and crushed stone.

Note: The size range and resulting high voids ration of Class I material make it suitable for use to dewater trenches during pipe installation. This permeable characteristic dictates that its use be limited to locations where pipe supports will not be lost by migration of fine grained natural material from the trench walls and bottom or migration of other embedment materials into the Class I material. When such migration is possible, the material's minimum size range could be reduced to finer than one-fourth inch (mm) and the gradation properly designed to limit the size of the voids.

(2)

Class II. Coarse sands and gravels with maximum particle size of 1½ inches (40 mm), including variously graded sands and gravels containing small percentages of fines, generally granular and noncohesive, either wet or dry. Soil types GW, GP, SW and SP are included in this class.

Note: Sands and gravels which are clean or borderline between clean and with fines should be included. Coarse-grained soils with less than 12 percent but more than five percent fines are neglected in ASTM D2487 and the USCS and should be included. The gradation of Class II material influences its density and pipe support strength when loosely placed. The gradation of Class II materials may be critical to the pipe support and stability of the foundation and embedment if the material is imported and is not native to the trench excavation. A gradation other than well graded, such as uniformly graded or gap graded, may permit loss of support by migration into void spaces of a finer grained natural material from the trench wall and bottom.

(3)

Class III. Fine sand and clayey (clay filled) gravels, including fine sands, sand-clay mixtures and gravel-clay mixtures. Solid types GM, CG, SM and SC are included in this class.

(Code 1977, § 13.20.200)

The following compaction methods are recommended as the optimums which will achieve desirable densities with the least effort:

(1)

Manufactured angular, granular materials. Manufactured materials which are angular, granular such as broken coral, crushed stone or rock, crushed shells, crushed slag or cinders which have a maximum size of 1½ inches (40 mm) may be placed on loose dumping with a maximum of compactive effort, except that care shall be taken to assure proper placement of material under pipe haunches.

(2)

Clean granular soils. With coarse-grained soils containing less than five percent fines such as GW, GP, SW, SP, GW-GP and SW-SP, the maximum density will be obtained by compacting by saturation or vibration. If internal vibrators are used, the height of successive lifts or backfill shall be limited to the penetrating depth of the vibrator. If surface vibrators are used, the backfill should be placed in lifts of six to 12 inches (150 to 300 mm). This material may also be compacted by tamping or other means provided that the desired relative density is obtained.

(3)

Coarse-grained soils with little to no fines. Coarse-grained soils which are borderline between clean and with fines containing between five to 12 percent fines, such as GW-GM, SW-SM, GW-GC, SW-SC, GP-GM, SP-SM, GP-GC and SP-SC, should be compacted by either hand or mechanical tamping, saturation or vibration, or whichever method meets the required density.

(4)

Coarse-grained soils with fines. Coarse-grained soils containing more than 12 percent fines, such as GM, GC, SM, SC and the borderline cases in the group (e.g. GM-SM), should be compacted by hand or mechanical tamping. The backfill should be placed in lifts of four to six inches (100 to 150 mm).

(5)

Fine-grained soils. Fine-grained soils such as MH, CH, ML, CL, SC-CL, SM-ML and ML-CL, should be compacted by hand or mechanical tamping in lifts of four to six inches (100 to 150 mm).

(6)

Tamping and vibrating. Soils which require compaction by tamping or vibrating generally reach maximum density with a minimum of effort when controlled to optimum moisture content.

(7)

Saturation. If flooding, jetting or puddling is employed for compaction, care should be taken to provide drainage and prevent flotation of the pipe. Saturation shall not be permitted during freezing weather. Erosion of support at the pipe sides and bottom by water jetting shall be prevented. Apply only enough water to give complete saturation. Allow time for the saturated soil in each layer to dewater and solidify until it will support the weight of workers.

(8)

Use of compaction equipment. Take care to avoid contact between the pipe and compaction equipment. Do not use compaction equipment directly over the pipe until sufficient backfill has been placed to assure that such equipment will not damage or disturb the sewer pipe.

(9)

Bedding. Sand is preferred but Class I, II or III soil is required primarily to bring the trench bottom up to grade. Bedding materials shall be placed to provide uniform and adequate longitudinal support under the pipe. Blocking shall not be used to bring the pipe to grade. Bell holes at each joint shall be provided to permit the joint to be assembled properly while maintaining uniform pipe support. A compacted depth of four to six inches (100 to 150 mm) is generally sufficient bedding thickness. In trenches which have natural materials of fine grains, and in conditions where migration of trench wall material into bedding material can be anticipated, either wide trench construction or well graded bedding material without void shall be used.

(10)

Haunching. The most important factor affecting water pipe performance and deflection is the haunching material and its density. Place and consolidate the material under the pipe haunch to provide adequate side support to the pipe while avoiding both vertical and lateral displacement of the pipe from proper alignment. Where coarse materials with voids have been used for bedding, coarse materials shall also be used for haunching and consideration shall be given to using wide trench construction. Place haunching up to the pipe spring line.

(11)

Initial backfill. Initial backfill begins above the spring line of the pipe. Use little or no tamping of the initial backfill since this area will provide little or no additional side support. The only purpose of extending the initial backfill to levels over the top of the pipe shall be to protect the pipe from impact damage resulting from any large objects in the final backfill.

(Code 1977, § 13.20.200)

Before setting any water pipe in place, each component of piping shall be inspected for damage and cleaned. Damaged components shall be rejected or repaired. Pipe bells shall be laid on the upstream end. Water pipe laying shall commence at the lowest elevation, which shall remain plugged until the water line is accepted by the city, and shall terminate only at manholes, service branches or cleanouts. Trenches shall be dewatered, if necessary, and pipe shall be laid under water only when approved by the city engineer. Whenever water pipe laying is interrupted, the end of the pipe shall be temporarily plugged to prevent the entrance of water, mud or foreign matter, and the pipe shall be secured to prevent being dislodged or floating.

(Code 1977, § 13.20.221)

Pipe and fittings shall be embedded in the trench with the invert conforming to the required elevations, slopes and alignment, and with the pipe bottom uniformly and continuously supported by a firm bedding and foundation.

(Code 1977, § 13.20.230)

These specifications shall include the furnishing and installation complete of all ductile iron water main, complete with the necessary valves, hydrants, fittings and appurtenances. Ductile iron pipe may be required on 12-inch lines and shall be required under all streets, driveways and where water lines are crossed by sewer lines.

(Code 1977, § 13.24.010)

(a)

Ductile iron pressure pipe, sizes six inches through 12 inches inclusive, shall be manufactured in accordance with the latest issue of any one of the following specifications or standards:

(1)

Ductile Iron Pipe ANSI-A-21.51 (AWWA-C151).

(2)

Cement Lining ANSI-A-21.4 (AWWA-C104).

(b)

Pipe shall be designed for 350 psi working pressure, laying condition two feet and five feet maximum depth of cover in accordance with Part 1 of the Manual of Computation of Strength and Thickness of Ductile Iron Pipe, ANSI 421, 50-1976 (AWWA C-150-76).

(c)

The minimum nominal wall thickness and standard thickness class for each size pipe shall be as follows:

(d)

All ductile iron pressure pipe shall be furnished with one of the following types of joints and as described in the proposal or bid request:

(e)

All ductile iron pipe shall be bituminous coated outside and cement-mortar lined inside with seal coat, all in accordance with ANSI A21.4 (AWWA C104).

(f)

Ductile iron pipe shall be approved by the Underwriters' Laboratory and shall be accepted by the state fire insurance commission for use in water distribution systems, without penalty. All pipe shall be new and made in the United States.

(Code 1977, § 13.24.020)

Mechanical joint gray or ductile iron fittings in sizes two inches through 12 inches shall conform to ANSI specifications ANSI AWWA C110, shall be Class 250, and the joint shall conform to ANSI specifications A21.11 (AWWA C111). The 14-inch through 48-inch mechanical joint fittings shall meet the same general requirements as the two-inch through 12-inch fittings, except they shall be Class 150. All gray or ductile iron fittings, regardless of size, shall be cement lined. Thickness is to be the same as the cement coating specified for ductile iron pipe, except coating may be applied by hand brush.

(Code 1977, § 13.24.030)

All manufacturers of ductile iron pipe and fittings shall furnish the city and project engineer certified mill test reports that the material conforms in all respects to the latest requirements of the specifications set forth in section 118-253. The city reserves the right through its employees or agents to observe mill tests and other tests recognized by ANSI.

(Code 1977, § 13.24.040)

Joints shall be made in accordance with the recommendations of the pipe manufacturer for the various classes of joints.

(Code 1977, § 13.24.050)

(a)

Definition. The terms "excavation" and "trenching," as used herein or in any other reference to the work under contract, shall refer to and mean any and all material excavated, for whatever purpose, in accordance with the terms of the specifications, plans, proposal and contract, and shall include all subsequent handling, backfilling, compacting, disposal of excess excavation materials, and the preparation of all subgrades, etc., necessary for a first class job.

(b)

Excavation work. Excavation work shall include clearing and preparation of the trench or excavation site, including the removal of all surface vegetation, stumps and debris; all sheeting, shoring, bracing, protection of adjacent property, preparation of all subgrades, storage of excavated materials off of the excavation site where necessary, backfilling, tamping and otherwise compacting of backfill and specified embankments, grading and surfacing; moving, hauling or otherwise transporting excavated materials from whatever source, where such materials are to be returned to the excavation site for backfill purposes, as directed by the city engineer; and all other excavation stipulated in this specification.

(c)

Classification of excavation. There shall be no classification of excavation materials, except as otherwise provided for in the proposal as extra excavation made as ordered by the city engineer, and the term "excavation" shall include all materials excavated or removed on the several sites of the work regardless of the type, character, composition or condition of the materials so excavated; and shall further include all debris, junk, broken concrete and all other materials within the excavation limits.

(d)

Pipe trench excavation. Pipe lines shall be installed to the alignment, grades and elevations shown on the drawings. Grade and alignment of pipe and pipe subgrades will ordinarily be obtained from offset (hub) stakes. Trenches shall be dug by means of a trenching machine wherever practicable. The use of any other type of power excavating equipment such as drag line, trench hoe or power shovel will not be permitted except with special authorization by the city engineer and under such requirements relative to uniformity of trench width and vertical trench banks as they may require. Hand digging will be required where the operation of trench machinery will damage trees, buildings, surface or subsurface structures. The minimum width of trench cut for each size of pipe shall be as follows:

The trenching machine shall be maintained on a sufficiently level roadbed to provide substantially vertical trench walls. The maximum horizontal offset of the trench bottom from the trench top (undercutting) shall be two inches.

(e)

Soft foundation Where soft foundation is encountered in the trench bottom, the contractor shall excavate below grade and provide either a gravel cushion or a concrete cradle for the purpose of supporting the pipe, as directed by the city engineer.

(f)

Bell holes. All bell holes shall be of ample size.

(g)

Deposit of excavated material. All excavated materials shall be deposited on the sides of trenches at such a distance that no additional load due to surcharge is placed on the bank, and shall also be deposited or moved after original deposit in such a manner that the pipe laying crew and the public, when the trench is in a highway or city street, will be inconvenienced as little as possible.

(h)

Trench banks; maintenance. It will be the contractor's responsibility to maintain the trench banks in a stable and vertical position by use of all necessary bracing or sheeting required for safety.

(i)

Dewatering of pipe trenches. The contractor will be required to keep the pipe trenches free from water and shall keep the natural groundwater table or surface not less than four inches below the elevation of the finished subgrade, from the time subgrade preparation is started until the pipe has been backfilled, at all points where such groundwater is within four inches of the elevation of the pipe subgrade. No work shall be done in trenches after rough excavation is completed if the subgrade is submerged in the dewatering of trenches and other excavations shall be disposed of in a satisfactory manner. The contractor shall be liable for all damages to private property caused by such disposal of water.

(j)

Rock excavation. In rock excavation, the contractor shall over-excavate six inches and place six inches of sand in the trench upon which the pipe is laid. The contractor shall further backfill over the pipe with the same earth or earth free from stone or rocks, to a depth of six inches.

(Code 1977, § 13.24.060)

Except where water mains cross under drainage channel drives, streets, or alleys, or lie under streets or alleys, backfill shall be brought up around the pipe in six-inch loose measurement layers from materials selected from the trench excavation, compacted by means of mechanical or hand tampers to 12 inches above the top of the pipe. Compaction shall be to 90 percent standard proctor density.

(Code 1977, § 13.24.070)

(a)

In general, excess excavated materials from trenches located in open fields and unimproved property will be distributed directly back over the pipe line and within the pipe line right-of-way, to a maximum depth above the original ground elevation at any point of six inches, at and across the trench, and sloping uniformly each way therefrom. Materials so wasted shall be carefully finished with a drag or blade machine to have a neat and uniform appearance without obstructing drainage at any point.

(b)

Except as stated in subsection (a) of this section, all excess excavated material remaining after final settlement of the trenches has occurred shall be removed and disposed of by and at the expense of the contractor, and to the satisfaction of the engineer.

(Code 1977, § 13.24.080)

Where shown on the plans, the contractor shall replace sod removed or destroyed in the excavation of pipe trenches with new sod of a quality and condition and from a source approved by the city engineer. All such sod furnished shall be equal to or better than the original sod removed. Sod replaced shall be kept watered for a period of one month after installation.

(Code 1977, § 13.24.090)

The contractor shall use every possible precaution to prevent injury to trees and shrubbery on and adjacent to the site of the work. He shall replace, at his own expense, any such trees or shrubbery damaged or destroyed by him, unless the removal thereof is required by the plans or is authorized by the city engineer. When tree roots 1½ inches or larger are encountered in making the excavation, the roots are not to be cut. Hand excavation shall be used, and any damaged root 1½ inches or larger shall be treated with a creosote paint as directed by the city engineer.

(Code 1977, § 13.24.100)

The work to be done under these standards consists in general of the installation of pipe, fittings, specials, valves and other pipe line appurtenances, shall include unloading such material from cars at the point of delivery, hauling, distribution and installation thereof; the furnishing and installation of all jointing materials, gauge valves, air valves and appurtenances, structure, concrete and all other materials required by the plans and specifications; making all specified and necessary connections with existing mains; making all required tests; restoration of all roadways, streets, driveways, sidewalks, crosswalks and street crossing surfaces; and replacement or repair of all drains, sewers, conduits, water, oil and gas lines, fences, culverts, bridges and other structures which may be damaged in the prosecution of the work; maintenance of traffic across sites of the work where required, with all necessary bridges, barricades, red lights and other safety provisions; making of all repairs to coatings and linings of pipe under the supervision of a representative of the pipe manufacturer; and the performance of all other work required by the plans and as specified in this division, all as directed and to the approval of the engineer.

(Code 1977, § 13.24.110)

In no case shall more than 300 feet of ditch be opened at one time in advance of the pipe laid without consent of the city engineer.

(Code 1977, § 13.24.120)

(a)

When the water main passes underneath any private concrete driveway, streets and highways tunnelling shall not be used, unless special permission is given by the city engineer. The contractor shall bore and encase under driveways, streets and highways. If the concrete is cut, it shall be cut to the pipe trench width to allow the main to be laid and for the proper backfilling of the ditch. After the main is laid and the ditch is properly backfilled, the driveway shall be restored to as good a condition as found, at the expense of the contractor.

(b)

Where driveways are cut to private residences, they shall be cut, the pipe installed and trench properly backfilled all in the same day.

(c)

Where the water main passes underneath any private or public driveway, where the driveway is used for parking cars such as at shopping centers, large business buildings, stores, etc., the contractor shall confer with the engineer for an approved method of procedure in doing work in order to minimize the interference of traffic to and from the parking area.

(Code 1977, § 13.24.130)

(a)

All pipe lines shall be tested by means of hydrostatic pressure of not less than 100 pounds per square inch for three hours. If test plugs are used, they shall be furnished and installed by the contractor at his own expense, together with all necessary anchors, braces and other devices necessary to withstand the hydrostatic pressure on such plug without placing any hydraulic thrust on the pipe line or any part thereof. The contractor shall be solely responsible for any and all damage to the pipe line and public and private property which might be caused by the failure of such test plugs or supports therefor. The allowable leakage shall not exceed ten gallons per 24 hours per inch diameter per mile of 42-inch and smaller pipe; and 7½ gallons on 48-inch pipe and larger.

(b)

After the section of line to be tested has been filled with water, the specified test pressure shall be applied by means of a force pump of such design and capacity that such pressure can be applied and maintained for the duration of the test period, which shall be not less than three hours for 24-inch and smaller pipe.

(c)

All water supplied to the line, after the initial filling thereof, shall be metered by means of a tested water meter approved by the city engineer.

(d)

Any and all leaks as evidenced by visual inspection of the soil at any point on the line constructed under this contract, which appear during the specified hydrostatic test or at any subsequent time before final acceptance of the whole works, shall be located and repaired by and at the expense of the contractor.

(Code 1977, § 13.24.140)

Before being placed into service, all new water lines shall be disinfected by adding chlorine to the water to bring the strength up to 50 ppm and let stand in the lines for a period of four hours. The line shall then be drained and flushed. The disinfection of the water lines shall be done under the supervision of the water department personnel or the city engineer. The method of disinfection of water lines must be approved by the city engineer. Water samples will be collected and tested and found safe for human consumption before lines are turned into the system.

(Code 1977, § 13.24.150)

Where the drawings do not show a profile or indicate cut, the cover on the pipe shall be three feet six inches below the top of the curb, or where there is no curb, three feet six inches below the established grade of the centerline of the street. The minimum cover shall be not less than two feet below the bottom of the ditch at crossings or parallel runs.

(Code 1977, § 13.24.160)

(a)

Pipe, fittings, specials and other accessories shall be unloaded at the point of delivery, hauled to and distributed at the site of the project by the contractor, and shall at all times be handled with extreme care to avoid damage thereto. Pipe, fittings, specials and other accessories are to be hauled on equipment equipped with pneumatic tires. Equipment, tools and methods used in unloading, reloading, hauling and laying pipe and accessories shall be such that no damage is done to the pipe or the cement lining therein. Hooks used for insertion in the ends of a pipe shall have broad, well-padded contact surfaces and shall be of such design and length that they will provide uniform support for a distance back from the end of the pipe of not less than one-third of the internal pipe diameter. In general, pipe tongs (padded) shall be used in the handling of all ductile iron pipe.

(b)

Cement lining in pipes or fittings which are broken or loosened in unloading or subsequent handling shall be repaired by and at the expense of the contractor, who may employ the pipe manufacturer to make such repairs, but in any case the repairs shall be made under the direct supervision of the representative of the pipe manufacturer. All outside pipe coating which is damaged by the contractor shall be repaired, prior to laying the pipe or placing the backfill, by removing all damaged coating, wire brushing the exposed metal and applying two coats of a permanently elastic coal tar paint of a type and quality equal to that used in originally coating the outside of the pipe and preferably of the same brand and formula. This paint shall be sufficiently hard before backfilling so that it will not be damaged thereby.

(c)

Where pipe is to be laid in front of or adjacent to business houses or manufacturing establishments, or where homes have well kept front yards, the pipe shall be delivered to the site of the work as the pipe is laid. Local storage of the pipe at the site of the work will not be permitted. By permission of the city engineer, 12 joints of pipe may be allowed on the site of the work at any one time, but it is to be laid before stopping work at night, and all trench backfilling shall closely follow the pipe laying.

(Code 1977, § 13.24.170)

(a)

Pipe lines shall be accurately installed to the alignment and profile indicated on the approved pipe installation drawings furnished for the purpose. Grades and elevations shall be determined by the pipe subgrade prepared as specified in horizontal alignment of all pipe 30 inches and larger in nominal internal diameter shall be by means of batter boards at each joint on curves and from lines supported on batter boards where on tangents.

(b)

The maximum deflection of any pipe joint, made necessary by vertical and horizontal curves or offsets, shall not exceed the amount as recommended by the manufacturer of the pipe.

(Code 1977, § 13.24.180)

Proper equipment, implements, tools and facilities satisfactory to the city engineer shall be provided and used by the contractor for the safe and convenient prosecution of the work. All pipe, fittings, hydrants and valves shall be carefully lowered into the trench, piece by piece, by means of cranes, derricks, tongs, slings, ropes or other suitable tools and equipment, in such a manner that no damage occurs to the pipe, pipe coating, pipe lining or to the trench subgrade. Under no circumstances shall pipe or accessories be dropped or dumped into the trench.

(Code 1977, § 13.24.190)

All earth, rubbish, dirt and other foreign matter shall be removed from the inside of all pipe and other appurtenances, and from the outside of spigots, before lowering into the trench, and shall be kept clean by approved means during and after laying. At times when pipe laying is not in progress, all open ends of the pipe and fittings shall be closed by approved means, and no trench water shall be permitted to enter the pipe.

(Code 1977, § 13.24.200)

Before lowering, and while still suspended, the pipe shall be inspected for defects and rung with a light hammer to detect cracks. Any defective, damaged or unsound pipe shall be rejected.

(Code 1977, § 13.24.210)

Cutting of pipe for closure pieces or for other reasons shall be done in a neat and workmanlike manner by a method which will not damage either the pipe or the pipe lining.

(Code 1977, § 13.24.220)

Flanged joints will be required where indicated on the plans. Care shall be taken in making up flanged joints so that there is no restraint on the opposite end of the pipe or fitting which would prevent pressure from being evenly and uniformly applied upon the gasket. The pipe or fitting must be free to move in any direction while bolting. Bolts shall be gradually tightened, each in turn, at a uniform rate around the entire flange.

(Code 1977, § 13.24.230)

(a)

Gate valves shall conform to AWWA specifications C500-71 or latest applicable revision and shall be Mueller, Iowa or approved equal.

(b)

Valves shall be iron body, bronze mounted and shall open turning to the left. Operators shall be as shown on the plans. Except where otherwise called for on the drawings, valves shall be nonrising stem, with joints to shut pipe with which the valve is to be used and shall be for 175 pounds water working pressure unless otherwise specified.

(Code 1977, § 13.24.240)

(a)

All valve boxes shall be four-piece Ducan Standard of cast iron of the extension type suitable for a depth of cover over the pipe line as required by the backfill requirements at each valve. Each valve box shall be provided with a suitable cast iron base and cover. Covers shall have cast thereon an appropriate name designating the service for which the valve is to be used.

(b)

All parts of valve boxes, bases and covers shall be coated by dipping in hot bituminous base material such as used for pipe dip. All valve boxes shall be installed to the final grade and set in concrete.

(Code 1977, § 13.24.250)

(a)

Air valves shall be furnished and installed complete in place with all appurtenances, in sizes, number and arrangement as approved for installation at each specified location. Air valves shall be designed for a working pressure of not less than 150 pounds per square inch. The air valves shall be completely automatic in operation. Complete construction and installation drawings, specifications, descriptive data, photographs, operating characteristics and capacities shall be submitted to the engineer for approval prior to purchase and installation.

(b)

Air valves, regardless of type, shall be designed for maximum durability and minimum of maintenance. The valve seats, pivots, levers, air orifices, floats (unless made of glass), bearings, guides, tailrods, guide bushings and all other moving and rubbing surfaces and parts, shall be made of monel metal, silicon bronze, phosphorus bronze or other equally durable and corrosion resisting metal, as approved by the engineer.

(Code 1977, § 13.24.260)

Check valves shall be cast iron bodies with full bronze mountings and conform to current AWWA/ANSI standards.

(Code 1977, § 13.24.270)

All fire hydrants shall comply with the requirements of section 118-171 of this chapter.

(Code 1977, § 13.24.280; Ord. No. 1167, § 4, 7-3-2018; Ord. No. 1184, § 2, 3-5-2019; Ord. No. 1209, § 1, 9-1-2020; Ord. No. 1213, § 3, 1-5-2021)

All tees, turns and fire hydrants shall be blocked in accordance with the standard detail drawing.

(Code 1977, § 13.24.290)

The contractor shall provide a good and sufficient maintenance bond in an amount equal to 110 percent of the cost of completed water line, guaranteeing the maintenance against any failure due to defective materials or workmanship of such improvement for a period of two years from and after the time of its completion and acceptance by the city. All bonds shall be acceptable to the city and shall be executed by surety companies licensed to do business in the state.

(Code 1977, § 13.24.300)

(a)

These recommended specifications include requirements for trench excavation, pipe embedment, joining and installing pipe and accessories, backfill placement and installation testing. These recommended practices specify detailed procedures for construction with PVC sewer pipe products.

(b)

SDR-35 and Schedule 40 plastic sewer pipe shall be used within the city limits, however, on special exceptions as approved by the city engineer and/or the chief building official, ductile sewer pipe may be used. In no case shall clay tile sewer pipe be permitted within the city.

(Code 1977, § 13.28.010)

The following words, terms and phrases, when used in this division, shall have the meanings ascribed to them in this section, except where the context clearly indicates a different meaning:

Contractor means the person entering into the contract with the owner for the installation of PVC (SDR-35) Schedule 40 water pipe and appurtenances.

Engineer means the person or government agency acting for the owner as his duly authorized agent in designing and engineering the project.

Inspector means an authorized representative of the city or the engineer assigned to make any and all necessary inspections of the work performed, materials and equipment furnished by the contractor.

Owner means the person or government subdivision entering into contract with the contractor for the installation of the PVC sewer pipe and appurtenances.

Whenever in the specifications or drawings the words "directed," "required," "permitted," "ordered," "designated," "prescribed" or words of like import are used, it shall be understood that a direction, requirement, permission, order, designation or prescription of the engineer is intended, and similarly, the words "approved," "acceptable," "satisfactory" or words of like import shall mean approved by, or acceptable or satisfactory to, the engineer, unless otherwise expressly stated.

(Code 1977, § 13.28.020)

Cross reference— Definitions generally, § 1-2.

The Figure #1 below shows a trench cross-section which identifies the meaning and limits ofterminology used in this specification for the terms foundation, bedding, haunching, initial backfill, pipe embedment and pipe zoning.

(Code 1977, § 13.28.030)

TRENCH CROSS SECTION SHOWING
TERMINOLOGY

FIGURE 1

The contractor shall be responsible for the acceptability and storage of all material furnished by him and shall assume responsibility for the replacement of all such material found damaged in shipping or on the job site or defective in manufacture. This shall include the furnishing of all material and labor required for the replacement of installed material discovered to be defective prior to the final acceptance of the work.

(Code 1977, § 13.28.040)

Trenches shall be excavated to the alignment and elevations as indicated on the sewer plans, any deviations must be approved by the city engineer. All trench excavation shall comply with applicable regulations, laws and ordinances. Specified in this division are standard construction requirements covering a broad range of both normal and unusual conditions that can be anticipated in sewer trench excavation and construction. Some items or work are specified as options to the contractor which does not need city engineer approval, however, some options do require the city engineer's approval.

(Code 1977, § 13.28.050)

Conflicting obstructions may be encountered when excavating the construction sewers without deviations from the location established by the sewer system drawings. The contractor shall be responsible for all conflicting surface and subsurface structures, utilities and obstructions. The contractor shall be responsible to call Oklahoma One-Call System at 1-800-522-6543, 48 hours prior to any excavation. The contractor shall bear all expense arising from obstructions encountered.

(Code 1977, § 13.28.060)

Unless specified otherwise, the contractor shall remove all pavement or other improved surfaces which require removal for the excavation.

(Code 1977, § 13.28.070)

All excavated material shall be stockpiled in a manner that will not endanger the work. Hydrants under pressure, water and gas valves, manhole covers, fire and police call boxes or other utility controls shall be left unobstructed and accessible until the work is completed. Gutters shall be kept open or other satisfactory provisions made for street drainage, and natural watercourses shall not be obstructed adjacent to streets, walks or driveways.

(Code 1977, § 13.28.080)

No debris shall be disposed of in the trench backfill. Debris, removed pavement and excavation which is surplus or unsuitable for backfill shall be disposed of by the contractor in a manner suitable to the city.

(Code 1977, § 13.28.090)

Where conditions are such that running or standing water occurs in the trench bottom, or the soil in the trench bottom displays a quick tendency, the water shall be removed by pumps and suitable means such as well points or pervious underdrain bedding until the pipe has been installed and the backfill has been placed to a sufficient height necessary to prevent flotation of the sewer line. Care shall be taken that any underdrain is of proper gradation and thickness to prevent migration of material between the underdrain, pipe, embedment and native soils in the trench below at the sides of the sewer pipe.

(Code 1977, § 13.28.100)

The maximum earthload on flexible pipe results from the consolidated prism of earth directly over the pipe, which is only as wide as the pipe. The load on flexible pipe does not increase in excess of the prism load as it does with rigid pipe. If the design load on the pipe is calculated based on embankment conditions (prism load), the contractor may excavate a trench which is as wide as is dictated by practical and economical construction. Types of construction for various anticipated conditions are described as follows:

(1)

Narrow unsupported, vertical-walled trench. The amount of pavement to be removed and replaced, amount of rock excavation or the amount of embedment material used may dictate that the most economical installation uses narrow, vertical-walled trenches. The width of narrow trenches as determined by the minimum working room for a man to place haunching material shall provide a minimum of 18 inches (450 mm) for four-inch to six-inch (100 and 150 mm) size pipes and not less than six-inch to nine-inch (150 to 230 mm) clearance on each side of the pipe for eight-inch (200 mm) and larger sizes. The resulting narrow trench minimum widths shall comply with Table 1. In narrow trenches the pipe embedment shall be compacted all the way to the trench walls.

TABLE 1
NARROW TRENCH WIDTH, MINIMUM

Note: Minimum trench widths are intended to provide adequate spacing between the pipe and trench wall for proper placing and compaction of haunching material and may vary somewhat depending on construction procedures being used.

(2)

Unsupported subditch trench. A variation of the narrow vertical-walled trench is to lay the pipe in a subditch and backcut or slope the sides of the excavation above the top of the pipe, as shown in Figure 2. This type of construction may be permitted by the city engineer where no inconvenience to the public or damage to the property, building, subsurface structures or pavements will result. In such case, width of the subditch below the top of the pipe shall comply with Table 1.

EXAMPLE OF SUBTRENCH

FIGURE 2

(3)

Wide trench. Wide trenches are classified as trenches whose width at the top of the pipe is greater than 2½ pipe diameters on each side of the pipe or a total of six pipe diameters. Although there is no width of trench beyond which the load on a flexible pipe exceeds the prism load, accepted installation practices usually dictate narrow trench construction. In isolated circumstances it may be more cost effective to use wide trench construction i.e., in areas where narrow trench walls cannot be maintained. If trench width at the top of a small diameter pipe (six inches—ten inches diameter) must exceed six pipe diameters, the embedment up to the pipe springline should be compacted to a point approximately 2½ pipe diameters from each side of the pipe. For large diameter PVC (SDR-35) pipe (12 inches—48 inches diameter) installed in wide trenches, the embedment up to the pipe springline should be compacted to a point at least one pipe diameter or two feet (600 mm) from each side of the pipe, whichever is greater.

(4)

Supported trench. Where an unstable or flowing soil condition is encountered in the trench wall, such as may be found by excavation below groundwater or in weak or noncohesive soils, stabilize this condition before laying the pipe. Depending upon the severity of the condition, the city engineer or contractor may elect to use tight sheeting, skeleton sheeting, stay bracing, trench jacks or a trench shield or box to support the trench during pipe laying operations. If the condition is too severe, it may be necessary to leave any sheeting in place or to use chemical or cement grouting of the soil adjacent to the excavation to prevent migration between the material used beneath and around the pipe and trench wall material. To allow sufficient working room plus trench wall supports the minimum excavated trench width to the outside of the sheeting or shield box shall be as shown in Table 2.

TABLE 2
Supported Trench Widths, Minimum

Table 2 widths are based upon eight to ten inches (200 to 250 mm) clearance on each side of the pipe to the inner face of trench supports. The trench supports are assumed to be six-inch (150 mm) thick trench box or shield walls or four-inch (100 mm) walls inside of two-inch (50 mm) sheeting. Exceptionally deep trenches with thicker sheeting and bracing or other systems of trench support may require the city engineer to vary these trench widths. Timber sheeting, where used below the top of the pipe, shall be driven approximately two feet (60 cm) below the bottom of the pipe and be left in place approximately 1½ feet (45 cm) above the top of the pipe. In supported trenches, compaction of foundation and embedment materials should extend to the trench wall or sheeting left in place.

(Code 1977, § 13.28.110)

The soil surface at the trench bottom shall be free of any protrusions which may cause point loading on any portion of the pipe or bell, and shall provide a firm, stable and uniform support for the pipe.

(1)

Special trench foundation. Where an unsuitable trench bottom condition is encountered, it must be stabilized by a method approved by the city engineer and/or chief building official.

(2)

Over-excavation. During the course of construction, should the contractor inadvertently over-excavate the trench more than six inches (150 mm) below the bottom of the pipe, but less than 12 inches (300 mm) below the bottom of the pipe, he shall fill that area of over-excavation with acceptable embedment material and compact to a density approximately equal to the native soil.

(3)

Rock subgrade. Ledge rock, hard pan, cobbles, boulders or stones larger than 1½ inches (40 mm) shall be removed from the trench bottom to permit a minimum bedding thickness of four to six inches (100 to 150 mm) under pipe. Sharp stones and crushed rock, larger than three-fourths inch, which could cause significant scratching or abrasion of the pipe, should be excluded from the embedment material.

(Code 1977, § 13.28.120)

All SDR-35 and Schedule 40 sewer pipe shall be bedded in river sand as approved by the city engineer and/or chief building official.

(1)

Use of compaction equipment. Take care to avoid contact between the pipe and compaction equipment. Do not use compaction equipment directly over the pipe until sufficient backfill has been placed to ensure that such equipment will not damage or disturb the sewer pipe.

(2)

Bedding. Sand is required to bring the trench bottom up to grade. Bedding materials shall be placed to provide uniform and adequate longitudinal support under the pipe. Blocking shall not be used to bring the pipe to grade. Bell holes at each joint shall be provided to permit the joint to be assembled properly while maintaining uniform pipe support. A compacted depth of four to six inches (100 to 150 mm) is generally sufficient bedding thickness. Compaction of the sand bedding around and over PVC sewer lines shall be 80 percent to 95 percent density as required by ASTM 698 Standard.

(3)

Haunching. The most important factor affecting sewer pipe performance and deflection is the haunching material and its density. Place and consolidate the material under the pipe haunch to provide adequate side support to the pipe while avoiding both vertical and lateral displacement of the pipe from proper alignment.

(4)

Initial backfill. Initial sand backfill begins above the spring line of the pipe. Use little or no tamping of the initial backfill since this area will provide little or no additional side support. The only purpose of extending the initial backfill to levels over the top of the pipe shall be to protect the pipe from impact damage resulting from any large objects in the final backfill.

(Code 1977, § 13.28.130)

Before setting any sewer pipe in place, each component of piping shall be inspected for damage and cleaned. Damaged components shall be rejected or repaired. Pipe bells shall be laid on the upstream end. Sewer laying shall commence at the lowest elevation, which shall remain plugged until the sewer line is accepted by the city, and shall terminate only at manholes, service branches or cleanouts. Trenches shall be dewatered, if necessary, and pipe shall be laid under water only when approved by the city engineer. Whenever sewer pipe laying is interrupted, the end of the pipe shall be temporarily plugged to prevent the entrance of water, mud or foreign matter, and the pipe shall be secured to prevent being dislodged or floating.

(Code 1977, § 13.28.140)

Pipe and fittings shall be embedded in the trench with the invert conforming to the required elevations, slopes and alignment, and with the pipe bottom uniformly and continuously supported by a firm bedding and foundation.

Curved alignment. In special cases where curved alignment is required, the recommended allowable minimum curve radii for SDR-35 PVC sewer pipe shall be based on the following formula:

This formula results in an insignificant amount 0.06 percent of ellipsing or diametric pipe deflection.

(Code 1977, § 13.28.150)

For shorter than standard pipe lengths, field cuts may be made with either hand or mechanical saws or plastic pipe cutters. Ends shall be cut square and perpendicular to the pipe axis. Spigots shall have burrs removed and ends smoothly beveled by a mechanical beveler or by hand with a rasp or file. Field spigots shall be stop marked with a felt tip marker or wax crayon for the proper length of assembly insertion. The angle and depth of field bevels and lengths to stop marks shall be comparable to factory pipe spigots.

(1)

Bell holes for elastomeric seal joints. The bell hold shall be no larger than necessary to accomplish proper joint assembly. When the joint has been made, the void under the bell should be filled with bedding or haunching material to provide adequate support to the pipe throughout its entire length.

(2)

Assembly of joints. Assemble all joints in accordance with recommendations of the manufacturer. If a lubricant is required to facilitate assembly it shall have no detrimental effect on the gasket or on the pipe when subject to prolonged exposure. Proper jointing may be verified by rotation of the spigot by hand or with a strap wrench. If unusual joining resistance is encountered or if the insertion mark does not reach the flush position, disassemble the joint, inspect for damage, reclean the joint components and repeat the assembly steps. Note that fitting bells may permit less insertion depth than pipe bells. (Note: When mechanical equipment is used to assemble joints, care should be taken to prevent over insertion.)

(3)

Branch fittings. Fittings for service branches in new construction shall be molded or fabricated with all gasketed connections. Taps into existing lines shall use a gasketed fitting in conjunction with a repair sleeve coupling or a gasketed saddle wye or tee with all stainless steel clamps. Saddles may be mounted on pipe with solvent cement or gasket but shall be secured by metal banding. Install saddles in accordance with manufacturer's recommendations. Holes for saddle connections shall be made by mechanical hole cutters or by keyhole saw or sabre saw. Holes for wye saddles shall be laid out with a template and shall be deburred and carefully beveled where required to provide a smooth hole shaped to conform to the fitting. The contractor will be permitted to use fittings which are prefabricated using pipe sections, molded saddles and PVC solvent cement, provided the solvent cement used in fabrication has cured at least 24 hours prior to installation. Cemented mitered connections without socket reinforcement shall not be permitted. Only PVC primer and solvent cement shall be used in cementing in accordance with the cement manufacturer's recommendations and ASTM D2855, "Making Solvent-Cemented Joints with PVC Pipe and Fittings." Quickly place temporary band clamps both upstream and downstream of the saddle and tighten.

(4)

Service lines. Unless required otherwise by the drawings, service lines from the property line to the collection sewer shall be at a minimum depth of three feet (one m) at the property line and shall be laid on a straight alignment and uniform slope of not less than one-fourth inch per foot (20 mm/m) for four-inch (100 mm) pipe and one-eighth inch per foot (100 mm/m) for six-inch (150 mm) pipe. Where collection sewers are deeper than seven feet (two m) a vertical standpipe or stack shall be required. The standpipe or stack does not require concrete encasement; however, it shall be uniformly supported by compacted backfill.

(5)

Pipe caps and plugs. All caps and plugs shall be braced, staked, anchored, wired on or otherwise secured to the pipe to prevent leakage under the maximum anticipated thrust from internal abnormal operation conditions or test pressures from water to air.

(6)

Manholes. Details of manhole construction shall be as shown on attached drawings from walls, bottoms, tops, castings, ladders and drop structures. Unless the drawings require otherwise, the pipe may first be laid through and beyond the manhole location followed by over-building the manhole, grouting the bench and cutting out the top of the pipe in the manhole. All manhole connections should be made using proper water stops. If portland cement grout is incorporated in the manhole connection, the grout shall be of a type that expands, rather than shrinks, upon curing. Water stops shall be installed in accordance with manufacturer's recommendations. Hinged connections which use short pipe bell stubs outside the manhole face will not be required to prevent shear breakage in SDR-35 PVC sewer pipe because of its flexibility. Excessive manhole settlement can cause excessive deflection and should be prevented. All sewer connections shall remain plugged until the entire sewer system being installed has been accepted by the city. The entire outside of all brick manholes shall be coated with 1:2 Portland cement and sand mortar, all other manholes shall be coated with tar.

(7)

Installing pipe through casings. Encasements for pipes under highways, streets, railroads, water lines and driveways shall have runners or cradles to support the pipe in the casing. A minimum of two supports shall be used per joint of pipe providing a maximum span of 6½ feet (1.9 m) for SDR-35 PVC pipe lengths of 12½ feet (3.8 m). The maximum span between supports for pipe lengths of 20 feet (6.1 m) shall not exceed that shown in Table 3. All encasements of SDR-35 PVC sewer pipe shall be in ductile iron pipe.

TABLE 3

Maximum Recommended Support Spacing For 20-Foot Lengths of SDR-35 PVC Sewer Pipe At Maximum Temperature of 73.4 Degrees Fahrenheit (23 Degrees Celsius)

Note: Each joint must be supported. Therefore, the maximum unsupported span will always be limited by pipe length.

(8)

Backfill material. The material used in the final backfilling operation need not be as carefully selected as was the bedding, haunching and initial backfill. In selection of final backfill material, exclude boulders, frozen clumps of dirt and rubble which could damage the pipe.

(9)

Backfill compaction. Unless specified otherwise, the final backfill shall use special compaction under improved surfaces and shoulders of streets, roads, aprons, curbs and walks, and natural compaction shall be used under open fields, lawns and wide shoulders or neutral grounds which are free of traffic. Natural compaction is attained by the loose placing of material, usually pushed or bladed, into the trench, rolling the surface layer with the placement equipment, mounding the surface and filling and maintaining all sunken trenches until final acceptance of the work trenches. In natural compaction, the main consolidation results from rainfall and groundwater fluctuations.

(10)

Minimum cover for load applicant. Provide at least 30 inches (760 mm) of cover over the top of the pipe before the trench is wheel-loaded. Provide for at least 48 inches (1,200 mm) of cover before using mobile trench compactors of the hydrohammer or impactor type. Depth of cover may be reduced to 36 to 42 inches (915 to1,070 mm) under some cases.

(Code 1977, § 13.28.160)

The contractor shall restore and/or replace shrubbery, fences, sod or other disturbed surfaces or structures to a condition equal to that which existed before the work began, to the satisfaction of the chief building official.

Clean up. Surplus pipeline materials, tools and temporary structures resulting from the work shall be removed by the contractor. All debris and excess earth from excavations shall be removed and disposed of by the contractor in compliance with applicable regulations, laws and ordinances. The construction site shall be left clean, to the satisfaction of the chief building official.

(Code 1977, § 13.28.170)

All sewer projects shall be tested upon completion of construction. The city engineer or chief building official shall designate the locations of tests and the extent of the sewer system to be tested, optional methods of testing leakage, alignment and deflection, and the extent of recording test results. All equipment for performing tests and making measurements shall be furnished by the contractor. All sections of the sewer system which fail to pass the tests shall have defects located and repaired or replaced and be retested until it is approved for acceptance.

(1)

Cleaning. Prior to other tests, all sanitary sewer lines shall be cleaned and inspected for major defects. Precleaning by an appropriately sized sewer cleaning ball or by high velocity jet or other method may be necessary.

(2)

Visual test. All sanitary sewer lines shall be inspected visually to verify accuracy of alignment and freedom from debris and obstructions. The full diameter of the pipe for straight alignments shall be visible when viewed between consecutive manholes. The method of test shall be visually lamping with mirrors and lights.

(3)

Air testing. The low pressure air test is a test which can be used for acceptance or leak location. The section of sewer line to be tested is plugged. Low pressure air is introduced into the plugged line. The sewer line should be flushed and cleaned prior to testing. The air test shall, as a minimum, conform to the test procedure described in ASTM C-828-80 entitled "Low-Pressure Air Test of Vitrified Clay Pipe Lines" or latest revision.

(4)

Leakage test. Leakage tests shall be specified for all new construction. This may include appropriate water or low pressure air testing. The leakage outward or inward (exfiltration or infiltration) shall not exceed 100 gallons per inch of pipe diameter per mile per day (0.19 m three/cm of pipe dia./km/day) for any section of the system. An exfiltration or infiltration test shall be performed with a minimum positive head of two feet (0.61 m). The air test, if used, shall, as a minimum, conform to the test procedure described in ASTM C-828-80 entitled "Low-Pressure Air Test of Vitrified Clay Pipe Lines" or latest revision. The testing methods selected should take into consideration the range in groundwater elevations projected and the situation during the test. With pressure pipe sewers, the leakage allowance should not exceed 100 gallons per inch diameter per mile per day (0.19 m three/cm of pipe dia./km/day) under a test head appropriate to the local conditions. Certification of the test results must be submitted to the reviewing authority before approval of the installation will be given. Replacement of existing sewers may require the connection of house service lines as the sewer is installed. Under these circumstances, the engineer shall specify special construction and/or inspection techniques to ensure the exclusion of infiltration to meet the above standards.

(5)

Deflection testing. Unless specified otherwise, the maximum allowable pipe deflection for SDR-35 PVC (reduction in vertical inside diameter) shall be five percent. Deflection tests shall be performed on all flexible pipe. The mandral will be pulled through all sewer pipes prior to acceptance.

(Code 1977, § 13.28.180)