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groundwater samples were collected from these borings. The discrete-depth groundwater sample analysis results indicated the presence of 1,1,1-TCA, 1,1-DCE, 1,1-DCA, PCE, and TCE in shallow groundwater beneath the LNC site at CCSB-01 (Area A) and downgradient of LNC at CCSB-03 (Figure 7). The discrete-depth groundwater sample collected at CCSB-2 at the former concrete bunker area did not contain detectable VOC concentrations. During 2000, an area-wide discrete-depth groundwater survey was conducted throughout Lodi by the City of Lodi. This work was conducted concurrently with a drive-point soil gas survey (Henshaw, 2001). During the 2000 subsurface investigation, 199 discrete-depth groundwater samples were collected at 172 boring locations throughout the City of Lodi. Of these, approximately 49 discrete-depth groundwater samples were collected from 48 borings within the northern portion of the city of Lodi. Nine of these samples were collected in the vicinity of the LNC site (Figure 5). No samples were collected on the LNC site during this sampling event. Most of the discrete-depth groundwater samples were colleted from the first encountered groundwater at a depth of 55 to 65 feet bgs. At a few groundwater sample locations (one within the northern portion of the city of Lodi), a second groundwater sample was collected at a depth greater than 70 feet bgs. The results of the City-wide discrete-depth groundwater survey conducted in 2000 indicate that shallow groundwater beneath portions of the northern portion of the city of Lodi has been impacted by PCE, TCE, and 1,1,1-TCA and its associated degradation products 1,1-DCE, and 1,1-DCA. These analytical results also indicated that the distribution of these VOCs is not well defined. These limited data suggested the possible presence of a narrow plume or series of plumes of 1,1,1-TCA, 1,1-DCE, and 1,1-DCA within the various groundwater zones located from approximately south of the LNC site to the vicinity of Lawrence and Donner Avenues (Figure 5). PCE and TCE plumes in the shallow groundwater follow a similar trend although the concentration of TCE is an order of magnitude higher than PCE. M ain\D:AEnvironmentaI\LN CV\10152007.wpd 20