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Page 10 of 13 3. When piping is placed on the bed, proceed to "First Test" (below) prior to backfilling trenches. 6-150.12 TESTING OF PIPING A. Notify the Owner's Representative, who MUST observe all tests, at least 24 hours in advance of any tests. 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 three step procedure. 2. a. b. Step One: Install pressure application system that includes two pressure gauges (15 psig maxim m). Apply 10 prig pressure to each piping system. Soap all joints using approved soap solution. Carefully observe each joi for evidence of leaks. Step Two: Protect area around piping systems to be tested to prevent workmen, passers-by, etc., from entry. Install pressure application sy that includes two pressure gauges (150 psig maximzn). Apply 60-75 psig pressure to each piping system, hold for 30 minutes, release pressure. C. CAUITON: Be sure to disconnect at tank or suhmerged pump before applying arm. d. .7•• � �. :1.11 • •1 «� • � . • • � ... II.?. •.. / • ;• � 17� •• ••• •• til:+mulzin e. Step Three: Protect area ara-4 piping systems to be tested to prevent workmen, passers-by, etc., from entry. Install pressure application system that includes two pressure gauges (10 psig maximum). Apply 5 psig pressure to each piping system, hold for 30 minutes, release pressure. CONTRACIOR SHATL AFdW1GE AND PAY FOR THE PERFORMANCE OF A S= CE= = PRECISION TEST (PFrRO-=, HUNTER OR NDE TECH.) OF 111E =IRE SYSTEM PRIOR COVERING TAI AND P!RO;XJCT PIPING. TEST S11AM BE CONDUCTED USING WMETI OR PRODUCT. NOTIFY01 HOURS IN ADVANCE OF E1 CanRACTOR Is READy• - a. 6-151 ELE=CAL WORK 6.21