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Project Number 1804SK01 September 17 2003 plume in Sacramento Street, two (2) wells will be installed on the east side of the plume along Washington Street, and three (3) wells will be installed on the south side of the plume in Lodi Avenue at the locations shown in Figure 2. The lateral extent of high PCE concentration shallow groundwater will be evaluated through the installation of two (2) wells in East Pine Street approximately 110 feet northwest and 150 feet northeast, respectively, of existing well MW-1 BB (Figure 2). In addition, two (2) shallow groundwater monitoring wells are proposed in East Oak Street between North Main and North Stockton Streets for lateral definition of groundwater conditions in the vicinity of existing well MW-51313 and one (1) aquifer test well is proposed in South Main Street just south of East Oak Street. Deep Groundwater Characterization Three (3) deep groundwater monitoring wells are proposed to provide deep zone groundwater quality data hydraulically downgradient of the source area and to calculate the flow direction and hydraulic gradient of the deep groundwater zone. The proposed locations are shown on Figure 2. One (1) well will be installed approximately 100 feet west of existing well MW-1 BB, one (1) well will be installed in the alley west of North Stockton Street midway between East Pine and East Oak Streets, and one (1) well will be installed in East Oak Street approximately 50 feet east of existing well MW-51313. Permittina Encroachment permits and a well installation permit will be obtained from the City of Lodi and San Joaquin County Environmental Health Department (SJCEHD), respectively, prior to beginning the fieldwork. Underground Service Alert (U.S.A.) will be contacted to field locate buried utility lines in the work areas prior to drilling. Drilling and Soil Sampling Layne Christensen Company of Fontana, California, a licensed drilling contractor (C-57 License No. 510011), will provide drilling, soil and soil gas sampling, and well installation services. A soil boring will be advanced to the desired depth at each well location. The shallow monitoring well borings will be advanced using a truck-mounted hollow stem auger drilling rig with a six-inch or larger diameter hollow-stem continuous flight auger in accordance with ASTM Method D 1452-80 for soil investigations and sampling by auger borings. Borings for the deep groundwater monitoring wells will be advanced using an air- percussion hammer drill rig equipped with a casing advancer to mitigate cross- contamination of shallow and deep groundwater zones. The air percussion rig also will be used to advance the aquifer test well boring to accommodate the large diameter PVC well casing. All downhole drilling equipment will be steam cleaned prior to drilling each boring. An EZC geologist or senior field technician working under the supervision of a California Registered Geologist will supervise the field operations and will record soil lithology and other pertinent data on a field boring log in accordance with ASTM Method D 2488-84 for visual description and identification of soils. Soil samples will be collected at 5-foot intervals starting from five (5) feet bgs to total depth. Samples will be collected using a split-spoon sampler containing three brass or stainless steel sleeves. All soil sampling equipment will be cleaned in an Alconox solution and double rinsed prior to each use. The soil samples will be capped, labeled, and stored in an iced cooler for overnight transport to the analytical laboratory to ensure sample analysis within 48 E,C Remediation 2