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'q PBS P 00 GxPI ti17D91 SS i q SEATTLE In ) P08 7P' 8035 rF TACOMA PORTLAND k STOCKTON 1,- RENO I ° r 1' 1 tL lI r i F is OND LOS A , °n TIME ' M E O I 1 li LOS ANGELES '� i t - - -COW 2737 WEST COMMODORE WAY SEATTLE WA 98199 1233 PRODUCTS P O BOX 24447 SEATTLE WA 98124-0447 TIME TESTED 'rF July 19, 1993 Mr Michael Collins f - San Joaquin County Public Health Services 'b Environmental Health Division ' P 0 Box 2009 Stockton, California 95201 RE Request to Reuse Soil Stockpile Generated During Tank Removal at Jackpot Food Mart, 405 Cherokee Lane, Lodi, CA (Property No 04-010) Dear Mr Collins , On March 31, 1993, approximately 300 yards of backfill were removed from an excavation at the subject site during the removal of three underground storage tanks Due to the limited amount of space on the property, Time Oil received permission from the Environmental Health Division (EHD) to transport the stockpile to our facility at 14000 E Highway 88, Lockeford (Property No 04-049) for storage pending characterization and evaluation of disposal options On April 29, six discrete samples (STK-1 through STK-6) and one four-point composite sample (STK-A,B,C,D) were collected from the stockpile at depths of 18 inches to 20 inches by a representative of Western Environmental Science and Technology Oversight of the sample collection was provided by the EHD Each discrete sample was analyzed at a State-certified laboratory for gasoline and BTEX by EPA Methods 8015 and 8020, while the composite sample was analyzed for California TTLC 10 Metals by EPA Method 6010/7000 and halogenated volatile organics by EPA Method 8010 With the exception of 1 2 ppm gasoline in a single sample (STK-4) , no organic contaminants were detected Metals were not identified at concentrations of concern Copies of the analytical report and sampling location plan are included as Attachment 1 At this time, a stormwater retention basin is located behind our facility at 1434 W Yosemite Ave , Manteca (Property No 04-167) Although the basin was originally constructed to contain stormwater runoff, the property is now connected to the City's storm system Because it is no longer used, Time Oil requested permission from the City of Manteca Public Works Department to backfill the basin In their reply dated July 6, 1993 , the Public Works Department determined that the basin could be backfilled (See Attachment 2 ) Because analytical results indicate that the above-referenced stockpile contains only trace concentrations of gasoline , Time Oil requests your permission to use it to backfill the basin at our Manteca property Although the stockpile is not large enough to fill the entire basin, utilizing it as backfill would be more r