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Chumn <br /> HEA!_ -too- Chevron <br /> 0 APR 15 Py12: 28 <br /> - Chevron Products Company <br /> . 6001Bollinger Canyon Road <br /> April 9, 1997 - Building L <br /> San Ramon,CA 94583 <br /> P.O.Box 6004 <br /> Ms. Mary Meays San Ramon,CA 94583-0904 <br /> San Joaquin County Environmental Health Marketing—Sales West <br /> P.O. Box 388 Phone 510 842-9500 f <br /> Stockton, CA 95201-0388 <br /> IRe: Former Chevron Station It 9-1918 45 East Harding Way, Stockton, CA <br /> Attached uniform hazardous waste manifests(Nos, 87415042,92652999) _ _i <br /> Attached informational letter,(Oil Equipment Service,7/3/95) <br /> Dear Ms.Meays: <br /> Per your request and to-complete file records for case closure,Chevron offers the following information <br /> regarding the disposition of underground storage tanks(UST's),groundwater monitoring purgewater;and" <br /> soil stockpiles_generated during excavation activities at the subject site. <br /> UST's <br /> According to all known information;"there were ten UST's discovered and removed from the subject site. <br /> the following list'describes eacliUST, the date of discovery; and/or the date of removal:' <br /> UST/contents Discovered Removed <br /> 3 - 10,000 gal. (gasoline) 2/7/88 2/7/88 <br /> 1 - 1,000 gal. (used oil) 2/7/88 2/7/88 <br /> 1 -550 gal. (used oil?) 11/7-11/88 12/?/88 - <br /> 1 •3,000 gal. (gasoline?) 11/15/88 12/?/88 <br /> 1 -4,000 gal. (gasoline?) 11/15/88 12/9/88 <br /> 1 - 1,000 gal. (gasoline?) . - 12/13-15%93 3/18/94 <br /> 2 -70 -80 gal. (hydr. oil) 3/7/97 3/10/97 <br /> The attached uniform hazardous waste manifests provide documentation for the handling and destination <br /> of four of the ten UST's described above. They are the 3 - 10,000 gallon UST's removed on 2/7/88 and the <br /> 1 - 1,000 gallon UST removed on 3/18/94. No other documentation was found to describe the <br /> handling/destination of the remaining UST's discovered onsite. <br /> Purgewater - - - <br /> There was no formal documentation found relating to the handling or destination of purgewater generated <br /> at the subject site since I1/88. The earliest and most relevant documentation on file are the monitoring <br /> consultants_statements on;their.reports that the purgewater was transported to Chevron's refinery in <br /> Richmond, California. The earliest documentation of such is a report dated December 21, 1992 by <br /> Chevron's consultant Groundwater Tecluiology, Inc. All subsequent monitoring reports contained similar <br /> statements. To my knowledge, Chevron has always handled its purgewater as non-hazardous. As such, I <br /> would guess that in the absence of such documentation, purgewater generated at the subject site prior to <br /> October, 1992 was handled the same way and was transported to the Richmond refinery. <br /> . Renyc,ed <br /> fl£::YC13Uk3 <br />