Ordinance 1631 - Laserfiche WebLink

• • roleum or fuel oil upon premises now occupied and used for that purpose under authority of the city of Everett. Section 7, SPECIFICATIONS FOR CONCRETE CRUDE OIL STORAGE TANKS: Side walls at bottom of tank shall not be less than six ( 6) inches in thickness and shall be well re-enforced with three-eighth ( 3/8 ) re-enforcement steel or standard re-enforcement wire netting.. Top of tank to be not less than eight ( 8 ) inches in thickness and to be arched not less than two ( 2 ) inches in the center, and to be thoroughly re-enforced. Composition concrete shall be not more than four ( 4) parts gravel, two ( 2 ) parts of sand, one ( 1 ) part cement , with not less than ten percent of hydrated lime, the same to be thoroughly mixed dry before water is added. The manhole shall be covered with a steel plate not less than three-sixteenths (3/16 ) inches in thickness, thoroughly bolted down and male absolutely waterproof, and all pipes entering tank shall be entered through opening left in tank and thoroughly corked with oakum and either lead or pitch waterproofing put around the same. After completion of tank at least a quarter to one-half inch of plaster shall be spread on the inside of tank, sides, bottom and top, composed of one ( 1 ) p art of sand, one ( 1 ) part of cement, and two ( 2 ) per cent of medusa compound. Where concrete tanks are installed, inside the foundation wall the same shall have at least four ( 4) feet of dirt , and the' surface the same as provided in steel tanks. Where it is inadvisable to have the top of the tank below the basement floor there shall be built a wall around said tank to extend at least three (3 ) feet and six ( 6 ) inches above the floor, and there shall be at least four ( 4 ) feet of earth between any portion of sail tank and the outside atmosphere. The said walls shall be not less than four ( 4) inches in thickness.