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PUBLIG"HEALTH SERVICES <br /> SAN JOAQUIN COUNTY <br /> ENVIRONMENTAL HEALTH DIVISION <br /> Ernest M. Fujimoto, M.D., M.P.H., Acting Health Officer <br /> 445 N. San Joaquin Street • P.O. $ox 388 • Stockton, CA 95201-0388 <br /> (209) 468-3420 <br /> ALEXANDER R COATE J <br /> PROJECT MANAGER <br /> EBMUD <br /> P 0 BOX 24055 JAN 2 41994 <br /> OAKLAND CA 94623-1055 <br /> RE: STOCKTON SERVICE CENTER SITE CODE: 1 169 <br /> 1804 W MAIN ST; STOCKTON <br /> Thank you for the conference call today between you, Sharon Owen and Ann Bui of BV Waste <br /> Science and Technology Inc (BVWST), and me. Our communication continues to encourage <br /> expeditious and efficient progress at the above referenced site. <br /> This letter summarizes our discussion and will direct you to perform the following activities in order <br /> to complete the "Draft Additional Site Assessment and Remedial Options Report" (Report) dated <br /> December 1993 as prepared by BVWST. <br /> Addendum to "Draft Additional Site Assessment and Remedial Options Report" (Addendum) - <br /> 2/18/94 <br /> •Perform a slug test to estimate the horizontal hydraulic conductivity in order to select the <br /> appropriate remediation method best suited for the site conditions. Each monitoring <br /> well that will be included within the remediation system should be tested and the <br /> results defined prior to designed the final remediation system. <br /> *Based upon the slug test results and re-evaluation of Weston's tidal survey, include the <br /> selected remedial option best suited to achieve the water quality goals of State <br /> Water Resources Control Board Resolution #68-16 and Resolution #92-49. <br /> *Conference call to be arranged on or before February 18, 1994 to discuss the progress of <br /> the Addendum and concurrence for the Draft Corrective Action Plan. <br /> First Quarter Monitoring Report - April 15. 1994 <br /> *Monitoring well sampling and groundwater measurements will be conducted in mid- <br /> February. Monitoring wells #1, #8, and #9 shall be analyzed for BTEX, and TPH-g. <br /> Although lead sampling was not discussed during our conference call, the 4th <br /> quarter monitoring of monitoring wells #1 and #8 for lead were nondetectable; <br /> thereby, confirming that lead is not a contaminant of concern. <br /> *Prepare cross section(s) of data gathered in the seven hydropunch sampling and <br /> monitoring wells #8 and #9. <br /> A Division of San Joaquin County Health Care Services <br />