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sand) was installed from 75 feet to 53 feet A surge block was used to set the sand pack <br /> . Bentonite chips were used to make a 2-foot plug and the wells were grouted to the surface <br /> with Portland cement Bonngs CB-1 and CB-2 were grouted from total depth to the surface <br /> with Portland cement <br /> 3.4 Monitoring Well Sampling and Surveying <br /> On June 16, 1994, the casing elevations of MW-8, MW-9 and EW-1 were surveyed relative <br /> to a fire hydrant on the corner of Sierra Nevada and Flora The hydrant was assigned an <br /> arbitrary elevation of 100 00 feet On June 16, 1994, the water levels in monitonng wells <br /> MW-8, MW-9 and EW-i were then measured relative to the top of the casing using a <br /> Solinst water level meter The relative piezometnc level in each well and hydraulic gradient <br /> were determined by subtracting the depth to groundwater from the relative casing elevation <br /> (Table 1) <br /> After water levels were measured, a clean- PVC bailer was used to surge and purge each <br /> well Between 9 and 10 gallons of water were removed from each well to stabilize <br /> temperature, pH and conductivity (Appendix A) The purge water was stored in 55-gallon <br /> drums on-site A water sample was then collected from each well using a new disposable <br /> plastic bailer Each water sample was collected in three 40 ml VOA vials <br /> TABLE 1 <br /> RELATIVE GROUNDWATER ELEVATIONS <br /> Genova Bakery <br /> 749 North Sierra Nevada Street, Stockton, California <br /> Relative Depth to Relative <br /> Well No Casing Elevation Groundwater Groundwater <br /> Elevation <br /> 6/16/94 6/16/94 <br /> MW-8 9732 6250 3482 <br /> MW_9 9686 6200 3486 <br /> EW-1 9692 6227 3465 <br /> ' Measurements m feet <br /> 3.5 Laboratory Analysis of Soil and Water Samples <br /> Selected soil samples were analyzed for total petroleum hydrocarbons (TPH as gasoline) and <br /> volatile aromatics (BTE&X) in accordance with EPA methods 5030 and 8020, respectively <br /> Two samples were also analyzed for total lead in accordance with EPA method 7420 Water <br /> samples were analyzed for TPH as gasoline and BTE&X in accordance with EPA methods <br /> 5030 and 602, respectively <br /> C—o-P-1 Anda$em a I.e 6 <br /> C_ B.1."QRR 9Vl1 <br />