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October 23, 1991 <br /> Quik Stop Markets,Inc. Page 1 <br /> Project No.3-49132-32 <br /> SEPTEMBER 1991 QUARTERLY <br /> - GROUNDWATER SAMPLING AND ANALYSIS <br /> FOR <br /> QUIK STOP MARKETS, INC. <br /> QUIK STOP NO. 132 <br /> 3555 W. HAMMER LANE <br /> STOCKTON, CALIFORNIA <br /> Introduction <br /> gram to <br /> RESNA Industries,Inc.(RESNA)has completed the September 1991 sampling prod <br /> neath Quilt Stop Market No. 132, located at 3555 <br /> ascertain the groundwater conditions be <br /> W. Hammer Lane in the City of Stockton,tSan quarterly to monitor tile sh n County, 11o.v groundwater <br /> and 2). The monitoring wells are sampled <br /> underlying the site. The program objectives objectives are listed below: <br /> • Measure depth of groundwater. <br /> e within• Plot groundwater cont undwar sampleshe site boundaries. <br /> • Sample and analyze gr <br /> • Compare current and past data. <br /> the site <br /> The existence and degree of petroleum hydrocarbons in the groundwater <br /> analyses of <br /> is determined by(1)the presence of frce-floatati product; and,(2) <br /> groundwater samples to detem�ine concentrations of total petroleum hydrocarbons as <br /> g e,and total xylenes(BTEX). <br /> gasoline(TPHG),as well as J)Pnzene,toluene,ethyl benzen <br /> Background <br /> Quik Stop Marke tanks on-site; <br /> et No. 132 formerly utiU addd leaded g solinound fuel-store and one 8,000 <br /> two 10,000-gallon tanks contained reg installed a <br /> gallon tank contained super unleaded gasoline. In 1987, <br /> Exceltech(RESNA) <br /> stem detected hydrocarbon <br /> vadose monitoring system around the tank s at the dibacK—ill v as removed from the product <br /> contamination in July 1990. Gasoline-contaminate <br /> line trenches and samples of the native resuoil atlts of the analyttoms of sis revealed that hydrocarbons <br /> analyzed for gasoline components. <br /> penetrated the soil adjacent to the east half of the product line trench which serves e <br /> pump island. <br /> analyses of <br /> Exceltech(RESNA)drilled four expAlu=auo���990 at the <br /> resulsite ts of laboratory analy d converted one ng to <br /> a groundwater monitoring well on g hydrocarbon cos.tamination. <br /> or no soil samples from three borings showed l;t tete thwest portion troleum of the north pump island <br /> Soil samples from one baring <br /> • m TPHG: The.groundwater.sample.from monitoring <br /> contained 460 parts per million(ppm) <br /> billion (ppb)TPHG and 21 ppb benzene as well as <br /> well MW-1 contained 470 pats p <br />