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4 <br /> SKTH COPY <br /> ENVIRONMENTAL TECHNOLOGIES CORPORATION <br /> April 29, 1997 <br /> 95136 <br /> Mr. Jim Cook <br /> Olin Interconnect Technology <br /> 555 Carnegie Street <br /> Manteca, California, 95336 <br /> Subject: Groundwater Monitoring at 555 Carnegie Street, Manteca, CA <br /> Dear Mr. Cook: <br /> Smith Technology Corporation is pleased to provide you with the results of the groundwater <br /> monitoring conducted at the above referenced site (Figure 1). On March 4, 1997, the depth to <br /> water was measured in wells MW-1, MW-2 and MW-3. Groundwater elevations are shown in <br /> Table 1. The groundwater elevation has increased an average of 3.46 feet since September 23, <br /> 1996 due to record rainfall in December and January. The groundwater gradient is to the north <br /> with a magnitude of 0.001 ft/ft or 8 feet per mile. The groundwater gradient for March 4, 1997 is <br /> shown on Figure 2. Copies of field notes are contained in Attachment 1. <br /> During this monitoring event, the wells were found to be in good condition with no visible <br /> defects. The next scheduled activities will be conducted in September 1997 and will also <br /> include monitoring depth-to-water and collecting groundwater samples from wells MW-1, <br /> MW-2, and MW-3. <br /> "you have any questions, please contact us at (209) 579-2221. <br /> Respectfully Submitted <br /> Smith Technology Corporation <br /> William Madison <br /> Geologist <br /> '....i. <br /> Je nn� P.E. E/« fV0,Cto 4%t"20 <br /> CA Registered Civil Engineer No. C 47410 E P• - 2Cl <br /> 149 <br /> Attachments ; <br /> cc: Mary Clark, Olin Corporation <br /> Linda Turkatte, San Joaquin Co. Public Health Services/Environmental Health Division <br /> w:V 51364epons\1 cargmr.doc <br /> 1260 Graphics Drive Modesto, CA 95351-1502 (209)579-2221 Fax(209)579-2225 <br /> Engineering Consulting Remediation Construction - <br />