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effler — ran inc . <br /> genera contras ors <br /> July 25, 1989 <br /> Chevron U.S.A. Inc. ' <br /> Post Office Box 5004 .. , <br /> San Ramon, California 94583-0804 <br /> Attention: Mr. John Randall <br /> Reference: Chevron Service Station #6155 <br /> Highway 99/Morada Lane <br /> Stockton, California <br /> Gentlemen: <br /> This letter discusses the backfilling of the soil borings that were drilled at the <br /> referenced location on May 19, 1988. The drilling activities are documented in a <br /> Woodward-Clyde Consultants (WCC) report dated,February 13, 1989.' The •four soil borings <br /> were drAIC¢ to 45 feet below grade and'according to WCC, groundwater. was not <br /> encountered: <br /> A San Joaquin County Environmental.Health Division inspection was scheduled the following <br /> day (May 20, 1988) to observe the backfilling of the soil borings . Specific <br /> instructions were given by the inspector on how the County wanted the borings <br /> backfilled. A concrete truck containing 3/4 inch rock and cement was sent back by the <br /> inspector and per his request a load of sand and cement was delivered. The borings were <br /> then backfilled to three feet below grade with sand and cement grout and topped with soil ; <br /> the final three feet, per the inspectors instructions. The Daily Report sheet dated May , <br /> 20, 1988 is attached for your review. <br /> The WCC report states that cuttings were used to backfill the borings. As indicated <br /> above, this information is incorrect. WCC was not on site when the borings were <br /> backfilled. Let me know if the report needs to be revised. <br /> Please do not hesitate to call should you have any questions or comments. <br /> Jerry W. Mitchell <br /> JWM/ns <br /> enclosure <br /> 1992 national avenue hayward, california 94545 - 1787 783 - 7500 <br />