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i <br /> • ppb(MW-3) 1,2-dichloroethane (1,2-DCA) was reported in five of the seven wells at concentrations ranging from <br /> 3 2 ppb(MW-5) to 220 ppb(MW-4) Additionally,domestic well WSW was sampled for TPHg,benzene,toluene, <br /> ethylbenzene,and total xylenes (BTEX),MtBE, and fuel oxygenates,all of which were reported as nondetectable <br /> MW-1 and MW-4 showed significant decreases inmost chemical concentrations Groundwater flow was to the <br /> northwest at an approximate gradient of 0 002 ft/ft,which is generally consistent with historical data Groundwater <br /> elevations across the site decreased by an average of 1 88 ft <br /> This report presents our understanding of existing conditions at the subject site The conclusions contained herein <br /> are based on the analytical results, and professional judgment in accordance with current standards of professional <br /> practice, no other warranty is expressed or implied SECOR assumes no responsibility for exploratory borings or <br /> data reported by other consultants or contractors <br /> ATTACHMENTS: <br /> • Table 1 -Groundwater Elevation and Analytical Data <br /> • Table 2-Fuel Oxygenates Analytical Data <br /> • Table 3-Groundwater Gradient Data <br /> • Figure 1 -Groundwater Elevation Contour Map <br /> • Figure 2-Groundwater Concentration Map <br /> • Attachment A-Field and Laboratory Procedures <br /> • Attachment B -Certified Laboratory Analytical Reports,Chain-of-custody Documentation,and Field <br /> Data Sheets <br /> cc Mr Marty Hartzell,Regional Water Quality Control Board-Central Valley Region(RWQCB-CVR) <br /> Ms Lori Duncan,SJCPHS <br /> Ms Madeline Scannavmo,5463 Cherokee Rd,Stockton,CA 95205 <br />