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�1 2MC01"I Associates <br /> 1433 North Market Boulevard •Sacramento California 95834-1943 • (916)928-3300• Fox(916)928-3341 <br /> September 12, 1994 <br /> ProJec,t 0x05-1 11 01 <br />' Mr Chuck Carmel <br /> ARCO Products Company SEP 13 1994 <br />' P O Box 5811 <br /> San Mateo California 94402 ENVIRONMENTAL HEALTH <br /> PERMIT/SERVICES <br />' Re Second Quarter 1994 Status Report for ARCO Service Station No 760 at <br /> 225 South Cherokee Lane Lodi California <br /> i <br />' Dear Mr Carmel <br /> At the request of ARCO Products Companv (ARCO), EMCON Associates (EMCON) and <br />' others are conducting an environmental investigation at the subject site (tree Figure 1) We <br /> have prepared this status ieport on the work conducted during the Second quarter 1994 <br />' GROUNDWATER MONITORING SECOND QUARTER 1994 <br /> Groundwater Technology, lnc (GTI) of Concord, California was contracted by ARCO <br /> to conduct the field work at the site; GTI subsequently forwarded their field notes and the <br /> laboratory reports to EMCON Field work included measuring depth-, to water and <br />' collecting groundwater samples for Subjective and laboratory analyses EMCON used <br /> these data to evaluate the direction and gradient of groundwater flow beneath the site <br />' On June 22 1094 a technician tiom GTI measuied depths to water and collected <br /> i-ioundwater samples from well,, MW-1 through MW-1 for subjective and laboratory <br /> analyses Floating product or product sheen was not noted in samples trom the wells (see <br />' Table 1) <br /> The wellhead elevations of the monitoring wells at the site were previously surveyed by <br />' Tom O Morrow The surveyed elevations and the depth-to-groundwater measurements <br /> (summarized in Table 1) were used to evaluate the potentiornetrrc surtace beneath the site <br /> The groundwater flow duection on June 24 1994 was to the northeast with a hydiaulic <br />' t�ladient of {) 004 (see Figuie 2) Gioundwater elevation data Lire presented on Figure 2 <br /> and in Table I <br />' Groundwater simples were analyzed foi total lietrelcuin hydiocarboiiN aN gasoline <br /> (TPHG), total petroleum hydrocarbons as diesel (TPHD) using Environmental Protection <br /> Agency (EPA) Method 5030/8015, total oil and grease (TOG) using EPA Method 413, <br /> and benzene toluene ethyl benzene. and total wlene (BTEX) iuyrner,, using EPA Methods <br /> 5030/8020 These samples were analyzed at GTEL Environmental Laboratories Inc. , in <br /> /pj1Nfx05\fN0 511 Ill 1,11 9411,6 <br /> 1 <br />