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;E <br /> ,Wm. J. Hunter & Associates 2220 Loma,Vista Dr. j <br /> A Registered Geologists Sacramento, CA 95825 <br /> etroleum& Mineral Appraisers (916) 972-7941 <br /> FAX (916) 972-1683 <br /> I <br /> i <br /> 3 <br /> October 3, 1991 <br /> Pamela. Vi of ett; REHS <br /> San Joaquin Public Health Service <br /> Environmental Health Division <br /> 445o. San Joaquin <br /> � qui r� street <br /> Stockton, CA 95262 <br /> a <br /> i <br /> Fief: 18775 Tom Paine Road, Tracy., CA. <br /> Dear Ms. Vi of ett; <br /> Enclosed is the Preliminary , Report and Workplan for further 7 <br /> investigative work at the above site.. because of therelatively <br /> high levels of contaminants found at the site, .we feel that hand <br /> angered borings .are the fastest .and most cost-effective way to <br /> determine the horizontal &- vertical size of the plume. We <br /> believe that if the water .table had been.. impacted during the time <br /> the UST was in use, • the frequent - .irrigation- schedule, (about <br /> every 10 days, ) _ w6u1d -have diluted any -contamination to <br /> non-detectable levels,' and do 'not recommend sampling :-,the water at <br /> this time. If the analyses - of the soil samples shows detectable <br /> levels in . the transition zone, hien Additional .work may be <br /> required. <br /> Your prompt review and response to this Workplan wi11 be greatly . E <br /> appreciated. <br /> 5 <br /> S' nr 1 , <br /> e <br /> Wi ' a J. Huntr <br /> A .ta:chment <br /> cc: Elliot Appleton. <br /> Thorpe Oil - <br /> UP ' <br /> E VIR6NMENTAL HEALTH- <br /> s PERMIT/SERVICES <br /> i <br /> 4 <br />