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regulatory requirements. Thr, tln-cshold may be established as a volumetric leak- <br /> rate <br /> eakrate or as a liquid level change.For tests regulated by the Southern California <br /> Region Tank Technical, Advisory Committee,the VLPT will be conducted as two <br /> 15-minute tests with less than 0.002-inch level drop during both tests to be <br /> considered a pass. <br /> 7. Discussion with the person responsible for all Exxon/Mobil testing and the person <br /> responsible for implementing the testing program for Chevron. Each of these <br /> people is familiar with the computerized VPLT system and had been present at <br /> simulated leak demonstrations with the equipment. <br /> S. Upon review,it has been determined that the VPLT system also meets the <br /> standards outlined in the San Diego County Standard for Secondary Containment <br /> Testing of UST's. Tho VPLT system can, after the test fluid settles for 30 <br /> minutes,measure the fluid level to an accuracy of+/-0.042 inches at the end of <br /> twn separate, 15 minute test intervals. <br /> H. <br /> amet ft 24,518 <br /> i~t Q-316S <br /> Jamcs H. Ray <br /> Civil Engineer /f <br /> Note: James H. Ray issued the original 2001 approval on RHI,/ !Design Group Inc. <br /> letterhead. RHL Design Inc. ceased providing this service as of 2/1/05. <br /> PAGE 2 of 3 <br />