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PHON,F les 2' 00 <br /> CAT, A011PI 5S 11 O <br /> SEATTLE 203 2b3 8030 <br /> TACOMA <br /> PORTLAND JJ(— r <br /> STOCKTON M120o t-,i— ff��f+»h�LTH <br /> RENO ` fir` (/�1 1'111 `LSERICHMOND � TIME OIL ��,YOX , I , + 11f`l�LOSANGELES 1v� e 2737 WEST COMMODORE WAY SEATTLE,WA Y8149'121& 4 <br /> aRoaucrs � A O BOX 24447 SEATTLE WA 98124-0447 <br /> TIME TESTED E <br /> May 25 , 1993 <br /> Mr Michael Collins <br /> San Joaquin County Public Health Services <br /> Environmental Health Division <br /> P 0 Box 2009 <br /> Stockton, California 95201 <br /> RE Site Assessment Report <br /> Jackpot Food Mart, 14000 E Hwy 88, Lockeford, CA (Property No 04-049) <br /> Dear Mr Collins , <br /> This letter has been prepared to provide you with information relating to the <br /> site assessment conducted at the subject property in September 1992 Please find <br /> enclosed a copy of Canonie Environmental's "Site Assessment Report, Underground <br /> Storage Tank Site, Time Oil Co , Jackpot Food Mart, Lockeford, California" dated <br /> April 1993 , which summarizes site activities and contains analytical results <br /> Site Background <br /> On Se 991, three underground for -&e tanks with volumes of 12 000 <br /> g Ylons 8 000 gallons and g ~-� 4 — -nc <br /> allons were removed from tie above-referenced <br /> propert a t of a facility upgrade During t e tank removal, - fielfi <br /> i strumentation indicated t e presence o contamination in samples collected from <br /> the floor of the tank bed, however, it did not appear that the sidewalls of the <br /> excavation or the area beneath the former pump islands had been impacted <br /> Groundwater was not encountered to a depth of 20 feet Figure 2 in Canonie's <br /> report identifies the locations of the former tanks <br /> At the direction of the Environmental Health Division, soil samples were <br /> collected from the tank excavation and beneath the former pump islands in <br /> accordance with the "Tri-Regional Board Staff Recommendations" and "LUFT Field <br /> Manual" All samples were submitted to a State-certified laboratory and analyzed <br /> for total petroleum hydrocarbons (TPH) as gasoline, and benzene, toluene, <br /> ethylbenzene, and xylenes (BTEX) TPH was indicated in the_ samples collected <br /> f om the tank excavation at concentrati~'-ons ranranging from "nam=dat@ct" to�9Q0 <br /> jpm with the hig est eve eing present eneath the west (fill) end of the <br /> 8,000 gallon tank and the east end of the 6,000 gallon tank Contaminants were <br /> not detected in the samples collected beneath the former pump islands <br /> During the tank removal, approximately 150 cubic yards of fill material were <br /> removed from the excavation and placed on plastic sheeting on the east edge of <br /> the property Analysis of six soil samples collected from the stockpile <br /> indicated the presence of gasoline at concentrations ranging from "non-detect" <br /> to 2700 ppm Because the stockpile appeared to be less contaminated than the <br />