ARCHIVED REPORTS_QUARTERLY MONITORING AND REMEDIATION REPORT - FIRST QUARTER 2007

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I 24 April 2007 AGE-NC Project No. 04-1207 Page 3 of 9 certified analytical laboratory in Paramount, California, and analyzed for: • Total petroleum hydrocarbons quantified as gasoline (TPH-g) in accordance with EPA Method 8015M; and • Benzene,toluene,ethylbenzene,and total xylenes(BTEX)and fuel additives methyl tertiary- butyl ether(MTBE),tertiary-butyl alcohol(TBA),di-isopropyl ether(RIPE),ethyl tertiary- butyl ether(ETBE),tertiary-amyl methyl ether(TAME),1,2-dibromoethane(EDB),and 1,2- dichloroethane (1,2-DCA)in accordance with EPA Method 8260B. 2.3. GROUND WATER EXTRACTION Ground water extraction activities were initiated on 26 January 2007 utilizing well MW-1 as the extraction well. A 1.5-inch submersible pneumatic pump powered by a small air compressor was installed inside the 2-inch diameter well casing,which operates at a low flow rate of approximately 0.5 gallons per minute (GPM). Ground water is extracted from well MW-1 and routed through plastic tubing to an on-site 21,000-gallon, closed-top, steel Baker Tank. Electricity is provided for the compressor through a temporary power pole installed at the site; power to the system is controlled by a timer,currently allowing the compressor to operate between 0615-hr and 2000-hr to minimize noise disturbance to nearby residences. On 05 February 2007, one ground water sample from the effluent line was collected into three laboratory-supplied,40-m1 VOA vials without a sample preservative. After collection,the samples were properly labeled,placed in a chilled container,and transported under chain of custody to CTEL for analysis for: • TPH-g in accordance with EPA Method 8015M; and • BTEX and fuel additives MTBE, TBA, DIPE, ETBE, TAME, EDB, and 1,2-DCA in accordance with EPA Method 8260B. No petroleum hydrocarbon constituents were detected in the sample analyzed.The laboratory report (CTEL Project No.CT214-0702041),quality assurance/quality control(QA/QC)reports,and chain of custody form are included in Appendix C. Between 26 January and 28 March 2007, a total of approximately 19,000 gallons of ground water were extracted from well MW-1. Once the tank is full,disposal alternatives for the extracted water will be evaluated based upon laboratory analysis of ground water samples collected from the tank. Advanced GeoEnvironmental,Inc.