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Sierra-Pacific Groundwater Consultants, Inc. <br /> HYDROGEOLOGISTS& GEOLOGISTS <br /> August 9, 1994 <br /> Mr. W.T. Nickerson <br /> Unocal Corporate Environmental <br /> Remediation & Technology <br /> 2000 Crow Canyon Road, Suite 450 <br /> San Ramon, California 94583 <br /> Subject: Soil Sampling Work Plan, Unocal order Contract No. 3400003285, PureGro/Brea <br /> Broadway Site, Stockton, Sierra-Pacific Project No. 94-055 <br /> Dear Mr. Nickerson: <br /> A work plan for collecting eight composite soil samples at the PureGroBrea Broadway Avenue site <br /> is enclosed. The San Joaquin County Environmental Health Department requires an $89.00 soil- <br /> boring permit for all hand-augering, and, or truck-mounted soil boring. However, Mike Infurna <br /> has indicated that given Regional Water Quality Control Board (Wendy Wyels, RWQCB) verbal <br /> approval to proceed,Unocal's existing well-installation permit will cover this soil sampling proposal. <br /> Sequoia Analytical is double-checking appropriate EPA test methods for our suite of pesticide <br /> analyses. If there are changes, substantive or otherwise, I will notify you immediately. Please call <br /> if you have questions or directives. <br /> Sincerely, <br /> S RRA-PACIFIC GROUNDWATER CONSULTANTS, INC. <br /> n teph Rapp, CEG-1133 <br /> Senior Engineering Geologist <br /> JSR:cf <br /> Enclosure <br /> cc. Wendy Wyels, RWQCB <br /> Michael Infurna, San Joaquin County <br /> Jan Wagoner, Unocal Corporation <br /> (916)933.1468 <br /> 4911 Windplry Drive,Sure 4 <br /> EI Dorado Hills, California 95762 (916)9333197 FAX <br />