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i <br /> t lf 7,�r � , `. 1 f ti��.-,� l <br /> May 28, 1997 ", <br /> ti <br /> `1� ff <br /> 2 <br /> Michael Infurna, Sr. REHS �CES <br /> San Joaquin County PHS <br /> Environmental Health Division <br /> P O Box 388 <br /> Stockton, CA 95201-0388 <br /> Re Thirteenth Quarterly Groundwater Monitoring Report, 1500 Shaw Road, Stockton, CA, <br /> Site Code 1727, AES Project No 145-94009-01 <br /> Dear Mr Infurna: <br /> This report summarizes the monitoring and sampling event conducted on March 27, 1997. <br /> Field activities at the above referenced Canteen facihty included the collection of fluid level <br /> measurements from the eight monitor wells onsite (MW-1, MW-2, MW-3, MW-3A, MW-4, <br /> MW-5, MW-6, MW-7) and the four offsite monitor wells (MW-8, MW-9, MW-10, and MW-11) <br /> on the U.S. Chemical property (Figure 1). <br /> Based on the groundwater elevations from the monitor wells, the groundwater gradient was <br /> • 0.38 feet per 100 feet and the general direction of groundwater flow was to the south. Fluid level <br /> measurements are summarized in Table I and the Potentiometrlc Surface map is included as <br /> Figure 1. Historical groundwater data are summarized in Table 2 Copies of the field data sheets <br /> and water measurement data are included in Appendix A <br /> Free product was not detected in any of the monitor wells, nor has it ever been The <br /> groundwater elevation was approximately thirteen feet higher during this monitoring event than <br /> during the previous gauging (12103196) The groundwater elevation for this event was comparable <br /> to the April 1996 event. <br /> Sincerely, <br /> Pebecca LU4 <br /> D. Work <br /> Applied Earth Sciences, Inc <br /> ALM3 HUNTER <br /> �J/fir��lrf7 <br /> 1�8f�1 74 <br />• Wil a unter � a> cNa <br /> C f rnia Registered Geologist No 860 <br /> 2833 Trinity Square, Suite 149 • Carrollton, Texas 75006 • Tel (972) 416-7171 • Fax (972) 416-7175 <br />