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i 15 January 2001 • AGE-NC Project No 96-0232 Page 2 of 20 2.0. CONTINUED INTERIM REMEDIATION AT EW-1 Between 01 October and 30 October 2000, ground water extraction (Interim remediation) from ' extraction well EW-1 was continued The extraction flow rate was set at approximately 2 gallons per minute (GPM), operated 24 hours a day, and piped directly into a 5,900-gallon above-ground Baker storage tank awaiting transportation to Invlrotec of Lincoln, California, a properly certified disposal facility Transported volumes of extracted water from EW-1 are summarized in Table 1, non- Hazardous Waste Manifests are presented In Appendix A I21 GROUNDWATER EXTRACTION FROM EW-1 Based on manifest records supplied by Invirotec to AGE between 01 October and 30 October 2000, approximately 42,400 gallons were extracted from EW-1 Based on a conversion factor of one gallon of water equivalent to 0 1337 cubic feet,the volume of extracted water was calculated at 5,668 cubic feet Based on a conversion factor of one gallon of water weighing 8 337 pounds at 60 degrees Fahrenheit, the mass of extracted ground water was calculated at 353,489 pounds Multiplying the I average MTBE concentration (assumed to be 58 µg/1 based on a grab water sample) by the pounds of MTBE-impacted ground water yields approximately 0 0205 pounds of MTBE extracted from EW-1, or the equivalent to 9 29 grams Mass-volume calculations of extracted ground water from ' EW-1 are presented in Appendix B ' 2 2 COLLECTION OF EW-1 GRAB GROUND WATER SAMPLE On 06 October 2000, AGE collected a grab ground water sample from the effluent line of EW-1 ' discharge Into the 5,900-gallon Baker tank The grab ground water sample was collected from the top of the Baker tank, directly from the effluent line coming from EW-1 The sample was collected In laboratory-supplied 40-m1 EPA-approved VOA vials containing 0 5 ml 18% hydrochloric acid ' as a preservative and Into a 1-liter amber bottle without preservative Care was taken to ensure that visible air bubbles were not present in the vials after filling and capping Water sample containers were labeled with the sample designation, date, time, and sampler's Initials 1 2 2 1 Laboratory Analysis Of EW-1 Water Sample ' Theab ground water le collected from EW-1 was logged on a chain-of-custody form, placed gr gr sample in a chilled container and transported to a California Department of Health Services (DHS)-certified ' laboratory for analysis for the following analytes 1 Advanced GeoEnvironmental,Inc