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STATE OF CALIFORNIA-Environmental Protecf,� �oency PETE WILSON Govemor <br /> CALIFORNIA REGIONAL WATER QUALITY CONTROL BOARD <br /> CENTRAL VALLEY REGIONf;tf ry �AL HEALTH �a <br /> 3443 Routier Road,Suite A .+ { �1 �i <br /> Sacramento,CA 95827-3096 <br /> PHONE:(916)255-3000 �y {��` <br /> FAX:(916)255-3015 96 JULG 3 AM 11: W 4 <br /> 18 July 1996 <br /> Ms. Katie Hower <br /> Chevron Pipeline Company <br /> P.O.iBox 5059 <br /> San Ramon, CA 94583 <br /> INVESTIGATION AND REMEDIATION, CHEVRON PIPELINE SITE, CORNER OF <br /> CORRAL, HOLLOW AND GRANT_LINE ,ROADS, TRACT',.SAN JOAQUIN COUNTY <br /> The'enclosed memorandum describes the results of my recent review of the case history and <br /> current status. There is a need for additional soil and ground water investigation, continued <br /> monitoring of the ground water, and implementation of remedial efforts. Please submit your <br /> it regarding the following basic issues which are more fully explained in the <br /> memorandum. <br /> 1. Confirmation sampling conducted in the original excavation. <br /> 2. ;',Lateral definition of soil contamination east of the source area. <br /> 3. ;Vertical definition of soil contamination at the entire site. <br /> 4. Soil sampling conducted during the installation of the monitoring wells. <br /> 5. ',Lateral definition of ground water contamination east and south of the source area. <br /> 6. Vertical definition of ground water contamination. <br /> 7. !,'Future plans for quarterly ground water monitoring including analyzing for lead and <br /> methyl t-butyl ether. <br /> 8. iImplementation of interim remedial measures, such as oxygen-releasing compounds <br /> or other remedial options. <br /> We would be happy to meet with you after you address,the above issues in writing. Please submit <br /> your"response by 9 August 1996. If you have any questions, you may call me at (916) 255-3077. <br /> W� <br /> JO L M. WEISs <br /> Engineering Geologist <br /> JMW jmwAsb <br /> Enclosure <br /> cc: San Joaquin County Department of Public Health Services, Stockto <br /> Geomatrix Consultants, San Francisco <br /> ;i <br />