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oil <br /> M� Mprqnen <br /> October 12, 1989 <br /> Mr. Stephen Manildi FN�j/�., ���1196 <br /> Administrative Manager pf '►IjM <br /> Sebastiani Vineyards/Woodbridge Cellars 1/7 F <br /> 4614 West Turner Road <br /> Lodi, CA 95258 <br /> Dear Mr. Manildl: <br /> McLaren is pleased to submit this addendum to the June 28, 1989 Sebastiani <br /> Vineyards/Woodbridge Cellars Site Assessment Report. Presented iai this <br /> addendum are the analytical results from the most recent sampling of the <br /> groundwater monitoring wells installed previously at the Sebastiani <br /> Vineyards site, located at 4614 West Turner Road, Lodi, California. <br /> Introduction <br /> In accordance with the August 3, 1989 letter from the California Regional <br /> Water Quality Control Board (CRWQCB) and the September 22, 1989 letter <br /> from the San Joaquin County Environmental Health Division (SJCEHD), the <br /> ten existing groundwater monitoring wells and the primary supply well were <br /> resampled to obtain additional information regarding the groundwater <br /> contamination previously detected at the site. <br /> Sample collection and Analysis <br /> The groundwater samples were collected by purging a minimum of three <br /> casing volumes from each monitoring well prior to bailing the water <br /> samples. The primary supply well was purged for approximately five <br /> minutes by running the well's turbine pump at its normal operating rate <br /> into the plant's pressure tank. The primary supply well water sample was <br /> taken from a 1/4-inch sample port located at the wellhead. <br /> Monitoring wells MW-1, MW-3, and MW-6 were sampled on September 12, 1989. <br /> The samples were analyzed for total petroleum hydrocarbons/gasoline range <br /> (TPH/G) and benzene, toluene, Xylenes and ethylbenzene (BTXE). Well <br /> locations are shown on Figure 1. On September 20, 1989, monitoring wells <br /> MW-1, MW-3, and MW-6 were sampled and the samples were analyzed for <br /> ethylene dibromide and organic lead. Monitoring wells MW-2, MW-4, MW-5, <br /> *0.J-7, MW-8, MW-9, and MW-10 were also sampled on September 20, 1989. <br /> These samples were analyzed for TPH/G and BTXE. The primary supply well <br /> was sampled on September 26, 1989 and analyzed for TPH/G and BTXE. <br /> Results and Discussion <br /> Tie TPH-and BTXE analytical results- for all-samples -collected from the <br /> groundwater monitoring wells are summarized in Table 1. This table also <br />