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- - —.,. - <br /> - <br /> August 14, 1990 <br /> Quik Stop Market No. 132 Page 1 <br /> Job No. 349132-31 <br /> WORK PLAN FOR <br /> GROUNDWATER INVESTIGATION <br /> AT <br /> QUIK STOP MARKET NO. 132 <br /> 3555 W HAMMER LANE <br /> STOCKTON, CALIFORNIA <br /> Exceltech,Inc., proposes the drilling and <br /> sampling of two exploratory borings and one <br /> oundwater monitoring well at Quik Stop Market No. 132 at 3555 W Dammer Lane, <br /> Qui <br /> Stop Markets has expressed to Exceltech its <br /> Stockton, California {Figure 1)• upon issuance of the proper permits. <br /> desire to begin work immediately p <br /> SITE HISTORY <br /> Quik Stop Market No 132 gently utilizes three <br /> underground <br /> ad leaded gasolge tanks on <br /> ine and one <br /> site; two 10,000-gallon tanks contain regular <br /> 8,000-gallon tank contains super the tanks eaded atne.theIsite9g�Thisc systemndetec ed <br /> vadose monitoring system aro <br /> und ine <br /> hydrocarbon contamination ieJuly <br /> product •li esSolThe contamincontaminata <br /> ted ed backfill has tbeen <br /> lined trenches <br /> containing <br /> ated the <br /> removed from the trenches. Soil samples were collected and analyzed for gasoline <br /> companer► etr <br /> 6 The results of.'the analysis <br /> revealed ct1ine Lehthat which serve sdrocarb ns vthe no north pump, <br /> ' <br /> u <br /> soil adjacent to the east half of the produ <br /> island: <br /> PROPOSED SCOPE OF WORX <br /> Exceltech proposes to drill and sample two exploratory soil borings, one on the north <br /> and one on the south side of the affected productline <br /> a first erFogtexed gronndwaterg, <br /> will progress the shallower of the following op ( ) <br /> {b) 20 feet below the lowermost sample which is nondetect b� 40pfeetbb low the <br /> vapor meter {if the soil is predominantly impermeable); <br /> or { ) <br /> lowermost samter(if the soil <br /> ple which is nondetected by the portable oExc ltecismic pwilor l also install one <br /> is predominantly permeable). in addition to the borings, ast of the <br /> located to the e <br /> groundwater monitoring well in a third 6nstructed so thatwhich thescreened interval extends <br /> product line trench. Thts well will be co <br /> above the gosei <br /> roundwater tableCelThisassess the conditions of thloration e sol and groundwater <br /> ='= information which will help x - - <br /> beneath the site. <br />