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Nestle USA, Inc., Ripon, California August 11, 2009 <br /> Second Quarter 2009 Site Status Report <br /> oo One private well located at 110 Manley Road (Swiss Club). <br /> Table 1 presents well construction information for each well, including the date the well <br /> was installed, and the groundwater sampling frequency. <br /> 3.1 GROUNDWATER MONITORING <br /> Wells were monitored for groundwater levels and sampled for trichloroethylene (TCE) <br /> and its degraded products, hereafter collectively referred to as chemicals of concern <br /> (COC) concentrations, as required by the 2006 CAO and the MRP. This section <br /> presents a summary of the activities performed and any exceptions in the Second <br /> Quarter 2009. <br /> 3.1.1 Groundwater Elevation Measurements <br /> Table 2 provides the list of wells and a summary of results and the dates of depth-to- <br /> water measurements that ECM gauged in the Second Quarter 2009. <br /> oo ECM measured groundwater levels in 119 wells in accordance with the MRP <br /> on April 6, 2009. Third parties measured water elevations for wells installed <br /> by the City, and Neenah Paper Company and provided the data to ECM. The <br /> details are provided below. <br /> oo City staff measured water levels for eleven municipal production wells and <br /> three monitoring wells, MW-9mon, MW-10mon, and MW-14mon. <br /> oo The City's consultant (Ecologic Engineering) monitored nine municipal <br /> piezometers located near the municipal lagoons, W-1 through W-9, on April <br /> 6, 2009. These wells are not subject to the MRP; however, ECM reports the <br /> water elevation data for these wells (Table 2) and evaluates the data when <br /> developing groundwater elevation contour maps. <br /> oo Lawrence Associates (consultant for Neenah Paper Company monitored <br /> eleven wells, TH-1 through TH-11, on April 6, 2009 (Table 2). <br /> 3.1.2 Groundwater Sample Collection <br /> ECM collected groundwater samples from each of the wells listed in Table 3 of the <br /> MRP per the sampling frequencies specified for each well. ECM samples additional <br /> monitoring wells installed after July 2005, which are not listed in the MRP, on a <br /> quarterly basis. The table below can be used as a reference for the tabulated data <br /> summaries presented in this report. <br /> 3 <br />