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` Sacramento Regional Office <br /> INTERNATIONAL E ,{{�� t,: ,r ! 3634 Backseater Street <br /> TECHNOLOGY _ENVRO MENIAL HEAD#1 Mather,California 95655-4108 <br /> CORPORATION 37 �,�� 916-361-7673 <br /> FAX, 916-361-3047 <br /> 9015 SEP -9 AM II; 25 <br /> September 3, 1996 <br /> Mr. Harlin Knoll, R.E.H.S. - <br /> San Joaquin County Public Health Services <br /> Environmental Health Division <br /> Post Office Box 2009 <br /> Stockton, CA 95201 <br /> Re: San Joaquin Catholic Cemetery <br /> Harding Way and Cemetery Lane, Stockton, California <br />`I Dear Mr. Knoll: <br /> It was a pleasure to speak with you late last month regarding further environmental corrective <br /> action requirements at the above-referenced site. As we discussed, IT Corporation (IT)proposes <br /> to modify the existing quarterly groundwater monitoring program at the site. <br /> Over the7'past'fo ir'quarters*of'groundwater sainplilig; concentrations of gasoline hydrocarbons <br /> have decreased rapidly to below detection limits in all five wells. This decrease may be-due in <br /> part sto risinggroundwaterelevations to above the screened interval of the wells. To evaluate <br /> this possibiliry"IT proposes to sample groundwater from two vapor extraction wells located in <br /> close prokirn ty to`the former underground storage tank. These wells are screened from 35 to <br /> 70 feet below ground surface (bgs) and would be ideal for evaluating groundwater conditions <br /> at the current depth-to-groundwater of approximately 50 feet bgs. IT recommends that these <br /> vapor extraction wells be sampled once and the results evaluated prior to establishing any <br /> additional groundwater sampling requirements at the site. <br /> Thank you for your assistance in-this case. If you approve of the approach outlined above, <br /> please provide documentation-to the property owner's 'representative, Mr. Al Vigil, so that <br /> reimbursement-from the State Water Resources-,Control Board can be secured. If you-have <br /> f questions or need any additional information, please call me at (916) 361-7673. <br /> °a <br /> Sincerely, <br /> IT CORPORATION <br /> Joseph'Ramage,' A:G. <br /> Proje.U'Manager <br /> cc': Mr: All Vigil- San Joaquin Catholic'Celnetery> <br /> IT Corpo=hon is a wholly owned suhmchm y of Internabonal Technology Corporation <br /> J <br />