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�I n <br /> � V � T <br /> "5, wry <br /> r <br /> Working To Restore Nature ` <br /> "I 116 <br /> 1710 Main Street <br /> Escalon, CA 95320 <br /> Phone (209) 838-3507 <br /> FAX (209) 838-3509 <br /> August 8, 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 /> Subject- Site Status Report, Knowles Property, 1140 West Hammer Lane, Stockton, CA <br /> Mr Knoll: <br /> This letter report updates RESNA Industries Inc (RESNA) activities performed to date during <br /> 1994 at the subject site (Figure 1) Activities included measuring depth to water and purging <br /> and sampling the site groundwater monitoring wells during the month of April 1994 <br /> GROUNDWATER MONITORING <br /> Groundwater monitoring was performed on April 29, 1994 The groundwater elevation has risen <br /> an average of 4 02 feet since the last monitoring event in December 1993 The groundwater <br /> flow direction on April 29, 1994 was generally southeasterly with an average hydraulic gradient <br /> of approximately 0 0035 ft/ft or 18 5 ft/mile This gradient is consistent with previous <br /> monitoring events A groundwater gradient map is included as Figure 2 Monitoring data are <br /> summarized in Table 1 Field monitoring data and well purge logs are contained in Attachment <br /> 1 <br /> SAMPLING METHODOLOGY <br /> Subsequent to monitoring depth to water, each monitoring well was purged and sampled on April <br /> 29, 1994 All purge water was contained on site in labeled DOT approved drums Groundwater <br /> samples were submitted to Sequoia Analytical (DHS Cert #1210) for analyses of total petroleum <br /> hydrocarbons as gasoline (TPHg) and benzene, toluene, ethylbenzene, and xylenes (BTEX) <br /> utilizing EPA methods 5030/8015 and 8020, respectively Sample collection was conducted in <br /> accordance with the site Quality Assurance/Quality Control Plan <br /> 1500381QRTERLYI4-94-SSR FNL <br />