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MISC#4\FILES\9750SPEC Page 16 of 22 J. SETTING & BEDDING PIPE: 1. A 4" minimum bed of backfill material is to be placed in all piping trenches. Smooth, compact and slope bedding material to allow a slope of 1/4" per foot toward the tanks. In extreme conditions, 1/8" per foot may be used if approved by Company Rep. , refer to other portions of these specifications. 2 . Piping shall be placed on prepared bed in such a manner as to minimize points at which one pipe may cross over another pipe. At points where piping must cross over, a minimum of one-half pipe diameter must separate the pipes. 3 . When piping is placed on the bed, proceed to "First Test" (below) prior to backfilling trenches. 5. 1 TESTING OF PIPING A. Notify the Company Rep. , who MUST observe all tests, at least -14 hours in advance of any tests. U� B. The Contractor is responsible for all labor, material, and equipment to conduct pressure tests (air or hyrdostatic) of all product, vent and vapor recovery piping. C. FIRST TEST (Prior To Backfilling Pipe Trenches) : Do not connect piping to tanks, remote pumps or dispensers. 1. The entire piping system, i.e. , product, vent and vapor recovery (where applicable) , shall be tested in accordance with the following two step procedure. a. Step One: Install pressure application system that includes two pressure gauges (15 psig maximum) . Apply 10 psig pressure to each piping system. Soap all joints using approved soap solution. Carefully observe each joint for evidence of leaks. b. Step Two: Protect area around piping systems to be tested to prevent workmen, passers-by, etc. , from entry. Install pressure application system that includes two pressure gauges (150 psig maximum) . Apply 100 .psig pressure to each piping system, hold for 30 minutes, release pressure. C. CAUTION: Be sure to disconnect lines at tank or submerged pump before applying air. d. SECOND TEST (BEFORE BACKFILLING AND PAVING) : APPLIES TO TANKS AND PRODUCT LINES.