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15 December 2000 AGE-NC Project No. 95-0100 Page 2 of 3 WELL PUMP REMOVAL AND SAMPLING The damaged pump will be removed from well DW-1 using a well pump truck and cable line. Groundwater sample collection will be performed in accordance with PHS-EHD and CVRWQCB sampling protocols. Prior to purging and sampling domestic well,the static water level will be measured using an electric water level indicator. Water level data will be recorded to the nearest 0.01 foot from a reference point marked on the top of the PVC well casing. Before and after each.use, the measurement device will be rinsed with an Alconox solution and water. Subsequent to measurement of depth to water and prior to sampling, the well will be purged using a disposable bailer to ensure that the sample is representative of the formation, rather than water standing in the well casing. The well will be purged until: 1) a minimum of three water casing volumes has been removed from the well; and 2) the field-measured ground water parameters have stabilized. A ground water sample will be collected following 80 percent recovery of ground water within the well. A water sample will be collected from the well using a disposable polyethylene bailer. The bailer is disposed of after one use and require no decontaminating, thereby minimizing cross contamination due to sampling devices. A sample will be drawn and collected in such a manner that agitation and exposure of the groundwater to the atmosphere is minimal. Sample containers will be filled using the appropriate disposable sampling attachment which allows controlled flow out of the bottom of the bailer by lifting the check valve. Ground water samples will be collected into laboratory supplied containers. Ground water samples for TPH-g, BTEX and fuel additives analyses will be collected into 40-m1 volatile organic analysis (VOA) vials containing 0.5-milliliters (ml)of hydrochloric acid as a sample preservative. Following collection the samples will be appropriately labeled and placed on ice and kept in a cooler until delivered to the laboratory for analysis. Chain-of-custody protocols will be used to document sample custody transfer from the field to the analytical laboratory. A chain-of-custody form will accompany the samples. DOWN-HOLE VIDEO As well construction details are not readily available for domestic water well DW-1, a down-hole camera video-probe is proposed to identify the screened interval of the well and to assess the integrity of the well and determine well construction specifications. The down-hole video will be performed by Water Well Technology, Inc. of Sacramento. Advanced GeoEnvironmental,Inc.