Planned residential developments (PRDs) are permissible on tracts of at least one and one-half (1 1/2) acres located within "R-2" and "R-3" zoning districts with a conditional use permit.

The overall density of a tract developed by a PRD shall be determined as provided in Section 400.620.

Permissible types of residential uses within a PRD include single-family detached dwellings (use classification 1.111), two-family residences (1.200) and multi-family residences (1.300). At least twenty percent (20%) of the total number of dwelling units must be single-family detached residences on lots of at least three thousand (3,000) square feet.

A PRD shall be an architecturally integrated subdivision.

To the extent practicable, the two-family and multi-family portions of a PRD shall be developed more toward the interior rather than the periphery of the tract, so that single-family detached residences border adjacent properties.

In a PRD, the screening requirements that would normally apply where two-family or multi-family development adjoins a single-family development shall not apply within the tract developed as a PRD, but all screening requirements shall apply between the tract so developed and adjacent lots.

In a planned unit development (PUD), the developer may make use of the land for any purpose authorized in a particular PUD zoning district in which the tract is located, subject to the provisions of these regulations. Section 400.510 describes the various types of PUD zoning districts.

Within any lot developed as a PUD, not more than thirty-five percent (35%) of the total lot area may be developed for higher density residential purposes ("R-3") and not more than ten percent (10%) of the total lot area may be developed for purposes that are permissible only in a "C-1", "C-2" and "C-3" zoning district (whichever corresponds to the PUD zoning district in question) and not more than five percent (5%) of the total lot area may be developed for uses permissible only in the "M-1" zoning district (assuming the "M-1" zoning district was included in the PUD when rezoned).

The plans for the proposed PUD shall indicate the particular portions of the lot or tract that the developer intends to develop for higher density residential purposes, medium density residential purposes, purposes permissible in a commercial district (as applicable) and purposes permissible in an "M-1" District (as applicable). For purposes of determining the substantive regulations that apply to the PUD, each portion of the lot or tract so designated shall be treated as if it were a separate district, zoned to permit (respectively) higher density residential ("R-3"), medium density residential ("R-1" or "R-2"), commercial or manufacturing/industrial ("M-1") uses. However, only one (1) permit—a planned unit development permit—specifically authorizing the planned unit development shall be issued for the entire development.

The non-residential portions of any PUD may not be occupied until all of the residential portions of the development are completed or their completion is assured by any of the mechanisms provided in Article IV to guarantee completion. The purpose and intent of this provision is to ensure that the planned unit development procedure is not used, intentionally or unintentionally, to create non-residential uses in areas generally zoned for residential uses, except as part of an integrated and well planned, primarily residential, development.

Temporary residences used on construction sites of non-residential premises shall be removed immediately upon the completion of the project.

Permits for temporary residences to be occupied pending the construction, repair or renovation of the permanent residential building on a site shall expire twelve (12) months after the date of issuance, except that the Administrator may renew such permit for an additional period not to exceed six (6) months if he/she determines that such renewal is reasonably necessary to allow the proposed occupants of the permanent residential building to complete the construction, repair, renovation or restoration work necessary to make such building habitable.

In deciding whether a permit for a special event should be denied for any reason specified in Section 400.250(C) or in deciding what additional conditions to impose, the Planning and Zoning Commission shall ensure that, (if the special event is to be conducted at all):

In cases where it is deemed necessary, the Planning and Zoning Commission may require the applicant to post a bond sufficient to ensure compliance with the conditions of the conditional use permit.

If the applicant requests the City to provide extraordinary services or equipment or if the Board of Aldermen otherwise determines that extraordinary services or equipment should be provided to protect the public health or safety, the applicant shall be required to pay to the City a fee sufficient to reimburse the City for the costs of these services or equipment. This requirement shall not apply if the event has been anticipated in the budget process and sufficient funds have been included in the budget to cover the costs incurred.

No 4.000 classification use in any permissible business district may generate noise that tends to have an annoying or disruptive effect upon:

Except as provided in Subsection (F), the table set forth in Subsection (E) establishes the maximum permissible noise levels for 4.000 classification uses in the "M-1" and "M-2" Districts. Measurements shall be taken at the boundary line of the lot where the 4.000 classification use is located and, as indicated, the maximum permissible noise levels vary according to the zoning of the lot adjacent to the lot on which the 4.000 classification use is located.

A decibel is a measure of unit of sound pressure. Since sound waves having the same decibel level "sound" louder or softer to the human ear depending upon the frequency of the sound wave in cycles-per-second (i.e., whether the pitch of the sound is high or low), an A-weighted filter constructed in accordance with the specifications of the American National Standards Institute, which automatically takes account of the varying effect on the human ear of different pitches, shall be used on any sound level meter taking measurements required by this Section. Accordingly, all measurements are expressed in dB(A) to reflect the use of the A-weighted filter.

The standards established in the table set forth in Subsection (E) are expressed in terms of the Equivalent Sound Level (Leq) which must be calculated by taking one hundred (100) instantaneous A-weighted sound levels at ten (10) second intervals.

Table Of Maximum Permitted Sound Levels, dB(A).

Impact noises are sounds that occur intermittently rather than continuously. Impact noises generated by sources that do not operate more than one (1) minute in any one (1) hour period are permissible up to a level of 10 dB(A) in excess of the figures listed in Subsection (E), except that this higher level of permissible noise shall not apply from 7:00 P.M. to 7:00 A.M. when the adjacent lot is zoned residential. The impact noise shall be measured using the fast response of the sound level meter.

Noise resulting from temporary construction activity that occurs between 7:00 A.M. and 7:00 P.M. shall be exempt from the requirements of this Section.

No 4.000 classification use in any permissible business district may generate any ground-transmitted vibration that is perceptible to the human sense of touch measured at:

No 4.000 classification use in an "M-1" or "M-2" District may generate any ground-transmitted vibration in excess of the limits set forth in Subsection (E). Vibration shall be measured at any adjacent lot line or residential district line as indicated in table set forth in Subsection (D).

The instrument used to measure vibrations shall be a three (3) component measuring system capable of simultaneous measurement of vibration in three (3) mutually perpendicular directions.

The vibration maximum set forth in Subsection (E) are stated in terms of particle velocity which may be measured directly with suitable instrumentation or computed on the basis of displacement and frequency. When computed, the following formula shall be used:

The values stated in Subsection (E) may be multiplied by two (2) for impact vibrations, i.e., discrete vibration pulsations not exceeding one (1) second in duration and having a pause of at least one (1) second between pulses.

Vibrations resulting from temporary construction activity that occurs between 7:00 A.M. and 7:00 P.M. shall be exempt from the requirements of this Section.

For purposes of this Section, the "odor threshold" is defined as the minimum concentration in air of a gas, vapor or particulate matter that can be detected by the olfactory systems of the Board of Adjustment.

No 4.000 classification use may generate any odor that reaches the odor threshold, measured at:

Any 4.000 classification use that emits any "air contaminant" as defined in the Statutes of the State of Missouri shall comply with applicable State standards concerning air pollution as regulated by the Missouri Clean Air Commission and/or the Missouri Department of Natural Resources (Missouri Department of Natural Resources) and/or the U.S. Environmental Protection Agency (USEPA).

No zoning permit or conditional use permit may be issued with respect to any development covered by Subsection (A) until the Clean Air Commission and/or the Missouri Department of Natural Resources and/or EPA has certified to the permit issuing authority that:

No 4.000 classification use in any district may discharge any waste contrary to the provisions of the standards of the Missouri Department of Natural Resources and the City of Sullivan ordinances.

No 4.000 classification use in any district may discharge into the City sewage treatment facilities any waste that cannot be adequately treated by biological means.

No 4.000 classification use may: