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17 July 1992 <br /> (GeoAudit CV 42F5-1.26) <br /> Page 3 of 6 <br /> I <br /> Laboratories in Ukiah) . The samples were analyzed for total <br /> petroleum hydrocarbons (TPH as gasoline and diesel) , volatile <br /> aromatics (BTE&X) , and total lead. <br /> Soil was extruded from the second and third tubes and described in <br /> accordance with the Unified Soil Classification System (see Boring <br /> Logs) . <br /> The monitoring wells were completed by the installation of 0. 020 <br /> screen PVC liner from 5 to 20 feet. Bentonite pellets were used <br /> from 2 . 5 to 5 feet and each well was backfilled to the surface with <br /> Portland Cement. <br /> Three soil samples from each well were analyzed (Table 2 and <br /> Appendix B) . TPH as diesel was detected in three soil samples at <br /> levels between 1.4 µg/g and 1. 9 gg/g. TPH as gasoline was not <br /> detected in any of the soil samples analyzed. Benzene and <br /> ethlylbenzene were detected only in sample MW-2-S-15 at 0. 0033 gg/g <br /> and 0. 0068 µg/g, respectively. Toluene was detected in four samples <br /> at levels ranging from 0.0072 pg/g to 0. 051 Ag/g. Total xylenes <br /> were detected in samples MW-2-S-10 and 14W-2-S-15 at levels of <br /> 0. 0097 Ag/g and 0. 069 µg/g, respectively. <br /> WATER SAMPLING <br /> f On 9 June 1992 a water sample was collected from each monitoring <br /> well. A water sample was also collected from one of two monitoring <br /> wells that had been previously installed by another firm on the <br /> south side (front) of the property in an investigation of a <br /> neighboring site. Permission was given by the owner of the wells, <br /> Union Ice Company, to sample the well. This well is shown as MW-1 <br /> Iin Figure 2 . <br /> Prior to purging and sampling, the water levels in each well were <br /> r measured relative to their casing tops on 9 June 1992 . The relative <br /> I piezometric levels and hydraulic gradient were determined from <br /> these data. <br /> IA PVC bailer was used to surge and purge the wells, and <br /> approximately 8 gallons of water were removed from each well to <br /> I stabilize temperature, pH and conductivity. These parameters were <br /> measured at one gallon intervals using a Hydac water analyzer. The <br /> purged water was stored in a 35 gallon drum on the site. <br /> Water samples were collected using a disposable plastic bailer. The <br /> samples were collected in two 40 ml EPA vials and 1 liter amber <br /> bottles. The water samples were analyzed for TPH as gasoline, TPH <br /> as diesel and BTE&X. <br />