The regulations set forth in Section 17.38.020 through 17.38.090 shall apply in all No. 10 districts.

Permitted uses in the I-2, heavy industrial district, are as follows:

1. All uses listed under light industrial;
2. Any other industrial uses contained within enclosed structures.

The following uses may be allowed by special use permit in accordance with the provisions of Chapter 17.48 of this title:

1. Any use not contained within an enclosed structure;
2. Any use listed as an A-2 emissions use by EPA;
3. Auto salvage yard;
4. Concrete or asphalt batch plant;
5. Airport;
6. Gravel, rock or sand extraction;
7. Slaughterhouse;
8. Refinery;
9. Stamping and forging;
10. Manufacturing of chemicals;
11. Manufacturing of animal by-products;
12. Electroplating operation;
13. Paint manufacturing;
14. Landfill.

Lot size requirements are as follows:

1. Every principal permitted use in this section shall be located on a tract of land having an area of not less than twenty-five thousand square feet and a width of the established building line of not less than one hundred fifty feet.
2. Every special use permitted in the I-2 district shall be located on a tract of land the minimum size of which shall be specified at the time a special use permit is authorized.

No building shall be erected or enlarged unless the following yards are provided and maintained in connection with such building, structure or enlargement:

1. Front Yard. A front yard equal to at least one-half the right-of-way of the street on which the lot fronts. However, in no case shall the front yard be less than thirty feet nor require more than sixty feet.
2. Side Yard. Where side yard abuts a zoning district other than industrial, forty feet required. Where yard abuts another industrial district, twenty-five feet required. Where yard abuts a railroad right-of-way, none required.
3. Rear Yard. Where rear yard abuts a zoning district other than industrial, forty feet required. Where yard abuts another industrial district, twenty-five feet required. Where yard abuts a railroad right-of-way, none required.

In the I-2 district, no building shall be erected or altered to a height in excess of thirty-five feet or two and one-half stories.

All buildings including accessory buildings shall not cover more than fifty percent of the net site area.

Accessory buildings shall be located on the same lot with the principal building, shall not be less than ten feet from the principal building if not attached, shall not exceed fifteen feet in height, nor be less than six feet from the side or rear lot line.

1. All proposed uses shall be reviewed and approved by the zoning board of appeals prior to the issue of any building permits to assure compliance with all provisions of this section.
2. Noise and Shock. Any machines, presses, breaks, forges, hammers and similar constructions shall be placed on suitable shock absorbing mountings and on suitable, reinforced concrete footings; shall be muffled so as not to become objectionable due to intermittence, beat frequency or shrillness; shall not be loaded beyond capacity as prescribed by the manufacturer.
3. Glare and Heat. Any processes emitting glare and heat shall be performed so as not to be seen from any point beyond the outside of the property.
4. Smoke and Dirt. Smoke and dirt shall not exceed 0.3 grains per cubic foot of flue gas at stack temperature of 500E Fahrenheit, nor shall smoke emitted to atmosphere be more dense than Ringlemann No. 1 for periods aggregating four minutes in any thirty minutes.
5. Odor and Gases. The emission of obnoxious odors of any kind shall not be permitted nor shall any gas be emitted which is deleterious to the public health, safety or general welfare.
6. Fire and Safety Hazards.
   1. All tanks providing storage of flammable liquids above ground shall be located twenty-five feet from property lines and twenty-five feet from the nearest occupied structure. All tanks providing storage of flammable liquids below ground shall be located not closer to the property line than the greatest depth to the bottom of the buried tank.
   2. The storage of rags, wastepaper or similar products of combustible nature, when enclosed in a building shall be enclosed in a building of "four hours' construction," no part of which may be located closer than one hundred feet from any property line.
7. Open Storage for Junk, Auto Wrecking Yards and Other Waste Products. All such storage shall be enclosed within a tight, un-pierced fence not less than six feet in height made of materials similar to or architecturally compatible with the construction materials of the principal building and subject to yard requirements for accessory buildings listed in Section 17.38.080, and a roadway shall be provided, graded, surfaced, and maintained from the street to the rear of the storage area to permit free access of fire trucks at any time.
8. Open Storage Other than Junk. All such storage shall be enclosed within a tight, un-pierced fence made of materials similar to or architecturally compatible with the construction materials of the principal building and not less than six feet in height, or enclosed within a green belt planting strip not less than six feet in width, and not less than six feet in height, to normally screen view of stock piles from any outside street; all fences subject to yard requirements of accessory buildings listed in Section 17.38.080. The storage of lumber, coal or other combustible materials shall be provided with a roadway, graded, surfaced and maintained from the street to the rear of the storage area to permit free access of fire trucks at any time.
9. Sewage Waste. No wastes shall be discharged in the public sewer system which are dangerous to the public health and safety. Acidity or alkalinity shall be neutralized to a pH of 7.0 as a daily average on a volumetric basis, with a temporary variation of pH 5.0 to 10.0. Wastes shall contain no cyanides and no halogens, and shall contain not more than ten ppm of the following gases: hydrogen sulphide, sulphur dioxide and nitrous oxide. Wastes shall not contain any insoluble substance in excess of ten thousand ppm or exceed a daily average of five hundred ppm or fail to pass a No. 8 Standard Sieve, or have a dimension greater than one-half inch. Wastes shall not have a chlorine demand greater than fifteen ppm. Wastes shall not contain phenols in excess of .005 ppm. Wastes shall not contain any grease or oil or any oily substance in excess of one hundred ppm or exceed a daily average of twenty-five ppm.
10. Mining of Sand and Gravel. Nothing in this chapter shall be construed to prohibit the mining of sand and gravel in property zoned District No. 10, heavy industrial district. However, any such activity shall be conducted only under a special use permit granted under the provisions of this chapter and upon compliance with conditions set forth in that special use permit that adequately address, including but not limited to, noise, hours of operation, dust, impact on surrounding properties (including those properties not within a District No. 10 zoning classification), traffic concerns, road improvements and economic benefit to the city.