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- - <br /> s FA- <br /> -- S�, <br /> D` <br /> F•! <br /> TECHNICAL WORK PLA <br /> GROUND WATER ASSESSMENTREC - <br /> � Al <br /> Spot Production Facility � ., f ' �' <br /> Color Sp ilitAQ it I fnrrr) <br /> 5400 l=ast Harney Lane <br /> Lodi, California ENVIR0NiY.,.i%.,;+.. r1EALTH <br /> PERMIT/SERVICES <br /> "-' BACKGROUND <br /> esel <br /> A 4,000-gallon underground storage tank (UST) used locatedto eati <br /> site5400 L, <br /> fuel was removed from the Color spot Lodi facility (the ) , on March 1, <br /> Past Harney Lane, Lodi, California (Figure 1 Site Location Map) , �1y <br /> W ocented <br /> 1989 by Jim Thorpe Oil Company, Inc. rUnder ou <br /> rndlStorawasbTe n'a Remoand tal�Color <br /> by Staal, Gardner & Dunne, Inc. (SCD), <br /> SSpoc Lodi, Inc. , March 1989. <br /> r of <br /> The sails surroun nd smelled of diesel fuel.ng the fill port and the sField monitoringewith <br /> the UST were visibly stained a <br /> a photoionization deter_tor (PID) also indicated elevated total volatile Petr° eum <br /> S <br /> UST was <br /> hydrocarbon (TPH) concentration�o <br /> removed exhibited ethylbenzene, talxylene mand TPPles ellected after econcentrations in excess of <br /> applicable regulatory actiin levtosverify theresult <br /> exiscontamination, <br /> terce £ soilcontamination, <br /> was hired by Color Spot, evaluate <br /> delineate theextent t tamof contmination, anto <br /> inantsaassociated wi h dies 1 fuel�acent domestic <br /> ground water wells for <br /> SGD conducted a soil vapor survey August 15, 1984 under San Joaquin <br /> :- <br /> Local Health District (SJLHD) permit 89-1857 and documented by SGD, Soil Vapor <br /> Stud Calor S of Lodi Inc. , October 1989. Results of the survey indicated G feet 46� <br /> • the diesel fuel contamination within the shallow sub surf1ce (_ep <br /> below ground surface) did not appear to have migrated laterally a significant <br /> d .stance beyond the tank excavation. The contamination appeared to be limited <br /> ts ofL. <br /> cal <br /> to the southwest corner of the excavation domestic waterlwellseatlthe site eatrthat /�5 / <br /> water samples collected by SGD from the da <br /> water did not contain hydrocarbon contamin <br /> time indicated that ground <br /> ation above <br /> regulatory action levels. <br /> in January 1990, which was <br /> SGB implemented a site remediation program <br /> documented by SGD letter <br /> r <br /> -report, <br /> 1990. Contaminatedsoilswere excavated,iremoved,oand <br /> Spot Lodi, Incl, Y <br /> disposed of off-site. As well asthe imonitored with l was being eao?ID�. lA£ter ll obviously �0A <br /> olfactorally monitored, a <br /> contaminated soil (by sight, smell, or PED reading) had been removed from the <br /> and floor to <br /> excavation, an additional nfeet <br /> Foli wing the removed <br /> rem valfofmthe soil,ails confirmatory <br /> , <br /> ensure complete reined <br /> he walls and floor of the . <br /> soil samples were collected from <br /> les exhibited only trace concentrationsoof <br /> r Analytical data obtained from the samp <br /> �s <br /> _—____.__._toluene and xylenes at concentrations well below regulatory action levels, <br />