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k'q KLEINFELDER <br /> 'I EXECUTIVE SUMMARY <br /> This report summarizes the third quarter 2005 groundwater sampling activities <br /> conducted in the vicinity of an underground storage tank (UST) at the General Mills <br /> Facility located at 2000 West Turner Road in Lodi, California <br /> Groundwater samples were collected from three monitoring wells, MW-2, MW-3, and <br /> MW-4 on September 20, 2005 (Plate 1) A fourth monitoring well MW-1 had a product <br /> skimmer installed during the last quarter and therefore, a groundwater sample from this <br /> well was not collected The three groundwater samples collected were analyzed for <br /> total extractable petroleum hydrocarbons as referenced to diesel (TPH-D), purgeable <br /> hydrocarbons as referenced to gasoline (TPH-G), benzene, toluene, ethylbenzene, and <br /> total xylenes (BTEX) No product or sheen was observed in the groundwater samples <br /> collected from wells MW-2, 3, and 4 during this sampling event <br /> Groundwater elevations ranged from -0 19 feet at MW-2 to 1 28 feet at MW-4 The <br /> groundwater flow direction was calculated to be south by southwest with an <br /> approximate gradient of 0 005 ft/ft This groundwater flow direction was noted to be <br /> slightly more towards the south with a slight increase in gradient from 0 004 to 0 005 <br /> ft /ft (See Table 1) <br /> The analytical results for the groundwater samples collected are summarized in Section <br /> 5 and Table 2 of this report None of the requested petroleum constituents, including <br /> TPH-G, TPH-D, and BTEX, were detected in the groundwater samples collected from <br /> the down-gradient monitoring wells, MW-2 and MW-3, or from the upgradient well, MW- <br /> 4 Based on the information obtained, it is Kleinfelder's opinion that the groundwater <br /> contaminant plume is located in the vicinity of MW-1 and the existing UST area, and is <br /> apparently contained within perimeter monitoring wells MW-2, MW-3 and MW-4 For a <br /> complete summary of our findings, including conclusions and recommendations, please <br /> refer to Section 6 of this report <br /> A copy of this report should be submitted to the San Joaquin County Environmental <br /> Health Department (SJCIEHD) and the State of California, Central Valley Regional <br /> Water Quality Control Board (CVRWQCB) for their review and comment <br /> This report, and the conclusions and recommendations presented, are subject to the <br /> "Limitations" presented in Chapter 7 of this report Any party other than the client who <br /> would like to use this report shall notify Kleinfelder, Inc of such intended use in writing <br /> for permission <br /> 28209 T091ST05R14541DH Iv Page 1 of 12 <br /> 0 2005, Kleinfelder, Inc November 30, 2005 <br />