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k � <br /> t. <br /> JN 40007-097-01 <br /> APR 11. 1997 � <br /> February 14, 1997 j ENVIRONMENTAL HEALTH <br /> �= PERMITISERVICES <br /> Mr. Mike Whelan. ' <br /> Environmental Engineer <br /> ARCO Products Company <br /> 4 <br /> 704 228th Avenue, Suite 482 <br /> Redmond, Washington 98053 <br /> t <br /> i <br /> RESULTS OF GROUNDWATER MONITORING <br /> December 19% and January 1997 r <br /> Proposed ARCO AM/PM Facility <br /> Manteca, California <br /> Dear Mr. Whelan: <br /> E <br /> SECOR International Incorporated (SECOR) has completed two episodes of monthly <br /> groundwater sampling and analysis of three monitoring wells installed on the proposed <br /> ARCO AM/PM facility. Well purging and sampling at the facility was performed at <br /> monitoring wells MW-1, MW-2 and MW-3 on December 26, 1996, and January 26, 1997. <br /> 'p <br /> The following report presents data collected from the twolsampling episodes. <br /> December 26, 1996 <br /> Dissolved phase gasoline, benzene, toluene, ethylbenzene and total xylenes (BTEX), methyl <br /> tert-butyl ether (MTBE) and volatile organic compounds (VOCs)were not reported above <br /> laboratory method detection limits (MDIs) in the groundwater samples collected from the <br /> three monitoring wells purged and sampled during this monitoring episode. <br /> Il <br /> A summary of the analytical results obtained is presented in Table 1. For comparison <br /> purposes, the results of the November 1996, analyses are presented with the current results. <br /> !e <br /> The laboratory method blank contained nondetect concentrations of gasoline,BTEX,MTBE <br /> and VOCs. Review of laboratory QA/QC data did not identify laboratory methodology <br /> errors that would have affected analyses performed. <br /> I <br /> ,i <br /> E <br /> r <br /> .7 <br /> 'S <br /> f <br /> rI <br /> I <br /> +.k <br />