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JAN 29 '93 12:09 HERBSTAkGINEERING P.2 <br />Herbst Engineering Inc. <br />January 29, 1993 <br />San Joaquin County <br />Public Health service <br />1601 East Hazelton Avenue <br />stocktone CA 95201 <br />Attn; Eric <br />7 ARE <br />W <br />V <br />JAN 2 9 1993 <br />ENVIRONMENTAL HEALTH <br />PERMIUSERVICES <br />The Triple rinsing of underground storage tanks process entails the following <br />procedure. Pump out the remaining product from the tank, at which time the <br />actual rinsing starts. The rinsing is done with a high pressure washer <br />water and soap, the soap is aqua -sol.. This is done three or more times, de- <br />pending on how dirty the tank is. At the end of each rinse the tank is pumped'. <br />out into barrels. All product is then picked up by a'disposal facility for re- <br />cycling. <br />office manager <br />a <br />M <br />I <br />5980 -24th Street 4, P.O. Box 22504 o Sacramento, CA 95822 • (916) 422-2628 • Uc. #503266 <br />