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Vic <br /> , MACAMA <br /> 2Working To Restore Nature <br /> 1710 Main Street 1 FEE _ <br /> Escalon, CA 95320 <br /> Phone (209) 838-3507 <br /> FAX (209) 838-3509 <br /> January 28, 1994 <br /> Mr Harlin Knoll <br /> San Joaquin County Public Health Services <br /> Environmental Health Division <br /> P O Box 2009 <br /> Stockton, California 95201 <br /> RE Fourth Quarter 1993 Monitoring Report, Knowles Property, 1140 West Hammer Lane, <br /> Stockton, California <br /> Dear Mr. Knoll <br /> This letter report updates RESNA Industries Inc (RESNA) activities during the fourth quarter <br /> of 1993 at the above referenced site (Figure 1) Activities included measuring depth to water <br /> and purging and sampling of the site groundwater monitoring wells <br /> GROUNDWATER MONITORING <br /> Groundwater monitoring was performed on December 16, 1993 The water table elevation has <br /> risen an average of 3 15 feet since the last monitoring event in August 1993 The groundwater <br /> flow direction on December 16 was generally eastward with a hydraulic gradient ranging from <br /> approximately 0 0025 to 0 01 ft/ft This gradient is consistent with previous monitoring events <br /> A groundwater gradient map is included as Figure 2 Monitoring data are summarized in Table <br /> 1 Field monitoring data and well purge logs are contained in Attachment 1 <br /> SAMPLING METHODOLOGY <br /> Well MW-3 remained dry. Wells MW-1, MW-2, and MW-4 through MW-8 were purged and <br /> sampled The sample from well MW-5 was not submitted for analysis because a sheen was <br /> noted on the purged water The groundwater samples were submitted to Sequoia Analytical <br /> 1500381QRTERLYI4QR-1993 FNL <br />