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u <br /> x <br /> r <br /> w F: <br /> STATE OF CADFORNIA <br /> CALIFORNIA REGIONAL WATER QUALITY CONTROL BOARD— OEORGE bEUNVAN,GOvB M <br /> :ENTRAL VALLEY REGION <br /> 3443 AOLMEA AOAD <br /> BACRAh EEO,CA 96&27.3099 a <br /> 2 November 1988 <br /> Mr, R. J. Edwards <br /> Mobil Oil Corporation <br /> 512 South Flower Street <br /> Pao. Box 2122 <br /> Los Angeles, :'A 90051 <br /> APPROVAL OF SOIL CORE BORING PROPOSAL, MOBILE BULK PLANT, 500 E. GRANT LINE ROAR, <br /> TRACY, SAH JOAQUIN COUNTY <br /> We have reviewed your proposal dated 15 September 1988 <br /> Engineering, inc. for up to six soil core borings for soilandwater asamlesn <br /> The proposal states that ground water is anticipated at 12.5 feet, and soil Core <br /> borings would go dawn bet►�een 13 and 15 feet to allow for water collection. Soil <br /> samples will be Collected at five foot intervals beginning at a depth of 5 feet <br /> and will continue until the first water table is encountered. One water sample <br /> will be Collected from each boring, Both sol and wat <br /> ier samples will be anal <br /> for Total Petroleum Hydrocarbons and Volatile Organic Compoundszedy, <br /> The information generated by this workplan may be used by Kapraelian Engineerin <br /> Inc,, as part of the preliminary assessment; however <br /> wells must be installed in order to confirm any results rattai ed ound water <br /> monitnrinq <br /> workplan or to verify greund water depth, rough this <br /> the site. Kaprealian Engineering, Inc. rgaadient, and Contamination, if any, at <br /> the workplan dated 15 September 1988. 6 request youwsubmit ith e the rresults, thek as stated ir <br /> interpretation and any further proposed work to us by 16 December 1988. <br /> If you have any questions please call me at (915) 361 .5672. <br /> HTONIA K. J. VORSTER <br /> Area Engineer <br /> RAE,ej <br /> cc, his, Diane Hinson, San Joaquin Local health District, Stockton <br /> Mr. Steve Pao, Mobile Oil Corporation, Richmond <br /> Mr. Gary Johnson, Kaprealian Engineering, Inc., Martinez <br />