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Ulu <br /> Jeff Won EH <br /> To: mjw@HaleyAldrich.com <br /> Subject: Soil and Grab Water sampling at 1805 Harbor, Stockton <br /> Hi Joe: <br /> As discussed in our telephone conversation today(April 1, 2004), San Joaquin County Environmental Health Department <br /> (EHD) is directing that grab water samples be collected in the soil borings in addition to the two hydropunch samples as <br /> proposed in the"addendum letter to Site Investigation Work Plan dated April 17, 2003, and the"Site Investigation Work <br /> Plan"dated December 9,.2002 prepared by Haley and Aldrich. <br /> EHD previously appoved installation of 2 deep soil borings, 1 monitoring wells, and 10 direct-push soil borings, with <br /> contingency of installing up 18 soil borings based on the condition observed at the site and the necessity of defining the <br /> extent of the contamination in soil and in groundwater.; However, only 2 grab water samples from.2 hydropunches and <br /> water samples from the proposed.monitoring well will be collected in the scope of work. This strategy is inadequate in <br /> defining the extent of the groundwater plume at the site. EHD directs that grab water samples in selected soil borings <br /> in addition to the two hydropunch samples be collected and analyzed in substitution of some of the proposed <br /> soil samples. The number of soil borings to be installed, as well as the number of soil samples and grab water samples <br /> should be collected based on the mobile laboratory results in the most cost-effective manner that will define the extent of <br /> the contamination in both soil and groundwater. " <br /> EHD has scheduled implementation of the proposed work with Haley&Aldrich on April 5, 2004. A well installation permit <br /> will be issued by EHD as soon as EHD receives an application. <br /> Jeffrey Wong <br /> Senior Environmental Health Specialist <br /> Environmental Health Department <br /> San Joaquin County. <br /> 16� <br /> " 1 <br />