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were included in the amended FRP submitted by GeoAudit in July of <br /> 1993 . The locations of all wells are illustrated in Figures 2 and <br />' 3 . <br /> Between May of 1990 and June of 1993, several consulting firms, <br /> including Sun Tech Environmental, Inc. , performed quarterly <br />' groundwater monitoring at the site. GeoAudit has recently been <br /> retained to perform quarterly monitoring at the site in accordance <br /> with the C & A order. <br />' In accordance with the FRP, three additional remediation wells were <br /> also installed by GeoAudit in October of 1993 . The results of the <br />' third quarter monitoring and the data obtained from the <br /> installation of remedial wells VW-5, VW-6, and VW-7, are presented <br /> in this report. <br /> 1 <br /> 3 . 0 PROCEDURES <br />' 3. 1 Groundwater Monitoring <br /> On September 27, 1993 , representatives of GeoAudit visited the site <br /> to perform quarterly monitoring procedures. Water depths were <br /> measured in all wells. Water was purged and groundwater samples <br /> were collected from eight wells, in accordance with quarterly <br />' monitoring protocols. <br /> 3. 1. 1 Monitoring Well Purge procedures <br />' A colonist water level meter was used to measure the groundwater <br /> depth in each monitoring well (Table 1) . The seven monitoring wells <br /> (MW--6 through MW-14) were then purged of between 4 and 10 gallons <br />' using a 2" submersible pump. The extraction well was purged of 60 <br /> gallons. Temperature, pH and conductivity of the purge water were <br /> measured at 2-gallon intervals (10-gallon intervals for EW-1) using <br />' Orion pH, temperature and conductivity meters (Table 2) . The water <br /> was stored in DOT-approved drums and stored on-site. <br /> 3. 1.2 Groundwater Sampling <br /> 1 Water samples were collected from the eight wells using a clean, <br /> disposable plastic bailer. The samples were collected in 40-m1 EPA <br /> vials and 1-liter amber bottles. The samples were transported in a <br /> chilled container to McCambell Analytical in Pacheco and analyzed <br /> for total petroleum hydrocarbons (TPH as gasoline) , volatile <br /> aromatics (BTE&X) , volatile halocarbons, lead (Pb) and ethylene <br />' dibromide (EDB) in accordance with EPA methods 8015, 602, 601, 7420 <br /> (239 . 2) and 601, respectively. <br />' 3 <br />