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- _- MsAZA <br /> Working to Restore Nature <br /> sci Main Street Escalon, CA 95320Phone (209) 838-3507 �iRECEIVIEU <br /> U�� � � 192� <br /> FAX (209) 838-3509 <br /> ENVIRONMEN'T'AL HLALTH <br /> PERMIT/SERVICES <br /> July 21, 1992 <br /> Mr Michael Infurna <br /> San Joaquin County Public Health Services <br /> Environmental Health Division <br /> P O Box 2009 <br /> Stockton, CA 95021 <br /> RE Second Quarter 1992, Monitoring and Sampling Report, Reeves Exxon, 2360 <br /> East St , Tracy, California <br /> ti <br /> Dear Mr Infurna <br /> This letter reports the results of Second Quarter 1992, groundwater monitoring and sampling at <br /> the referenced site (Figure 1) <br /> On June 26, 1992, depth to water data measurements were collected from wells MW 1, MW2, <br /> and MW3 (Table 1) Groundwater elevation dropped an average of 0 13 feet since last <br /> measured in December, 1991 Figure 2 depicts the groundwater gradient Groundwater flows <br /> to the northeast at a magnitude of 0 005 feet per feet or 28 feet per mile Monitoring data is <br /> included in Attachment 1 <br /> i <br /> After purging a minimum of three casing volumes of groundwater and the stabilization of <br /> temperature, pH and EC, samples were collected from each well in accordance with RESNA <br /> Industries' Well Monitoring Protocol Samples were analyzed by RESNA Environmental <br /> Laboratories (DHS Cert #1211) for benzene, toluene, ethylbenzene, xylenes (BTEX) and total <br /> petroleum hydrocarbons as gasoline and diesel (TPHG & D) by EPA methods 8020 and <br /> 5030/8015, respectively. <br /> Low levels of gasoline hydrocarbons were detected in well MW1 Moderate levels were <br /> detected in MW2 Petroleum hydrocarbons as diesel were not detected above method reporting <br /> limits in these wells No petroleum hydrocarbons analytes were detected in MW3 Table 2 <br /> LAo70792 LF <br />