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� r.d <br /> PUBLIC HEALTH SERVICES <br /> SAN JOAQUIN COUNTY A <br /> JOGI KHANNA SAD..Nt.P.H. <br /> Healch Officer P <br /> .R <br /> C4LF.. <br /> P.O. Box 2009 • (1601 East Hazelton Avenue) •Stockton,California 95201 i 0 <br /> (209) 468-3400 <br /> B L HUNTER J <br /> ENGINEER - ENVIRONMENTAL PROJECTS <br /> CHEVRON USA PRODUCTS CO <br /> P O BOX 5004Lv 1 7 199? <br /> SAN RAMON CA 94583-0804 <br /> RE: Chevron SS# 9-4275 SITE CODE: 1952 <br /> 2905 W. Benjamin Holt Dr. <br /> Stockton, CA <br /> San Joaquin County Public Health Services, Environmental Health <br /> Division (PHS/EHD) has reviewed the "Quarterly Groundwater <br /> Monitoring Report" dated July 22, 1992 and the "Summary Report" <br /> dated April 8, 1992 for the above referenced site. <br /> In March 1992 downgradient monitoring well #6 and upgradient <br /> monitoring well #7 were installed and groundwater samples were <br /> collected from all monitoring wells. Quarterly sampling of all <br /> the monitoring wells occurred June 1992. <br /> PHS/EHD has not received a quarterly report for the third quarter <br /> of 1992 and was not notified of groundwater sampling during that <br /> period. <br /> At the meeting with Arco and Chevron representatives on January <br /> 28 , 1992 at the Central Valley Regional Water Quality Control <br /> Board office a date of June 30, 1992 was set for submittal of a <br /> "Problem Assessment Report," as outlined in Tri-Regional <br /> Guidelines Appendix A., if the installation of monitoring wells 6 <br /> and 7 defined the extent of the groundwater contamination. The <br /> groundwater sample results from two samplings of these wells <br /> indicate that monitoring well 7 defines the extent of <br /> contamination upgradient and that further sample results from <br /> monitoring well 6 results are needed to evaluate the extent of <br /> contamination downgradient. . <br /> A "Problem Assessment Report" or a work plan for an additional <br /> monitoring well should be submitted to PHS/EHD by February 1, <br /> 1993 . Investigation and remediation of this site has been slow. <br /> The present levels of contamination warrant more timely <br /> attention. <br /> A Division of Sun Joaquin County Hcalth Care Setvoces �� <br />