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Soon Kim <br /> Page 2 <br /> At the August 3 , 1995, meeting attended by Steve Ronzone from Del <br /> Monte, it appeared that Del Monte would propose additional wells <br /> that could be used as vapor extraction, air inlet or observation <br /> points . This further work has not been proposed and in the <br /> "Intrinsic Bioremediation Demonstration" it states that <br /> confirmation sampling in other areas of the groundwater <br /> contamination plume may not be necessary and that "this should be <br /> further discussed and evaluated after four quarters of data is <br /> collected" . <br /> PHS/EHD is concerned with the efficiency of the existing air sparge <br /> and vapor extraction system because the air sparge and vapor <br /> extraction wells are in the same bore hole. Evaluation of an <br /> efficient air sparge/vapor extraction system should be made to <br /> investigate this alternative for active remediation of the whole <br /> site . Submit to PHS/EHD a work plan for additional wells by <br /> November 10 , 1995 . <br /> The "Quarterly Monitoring Results" indicate continued high levels <br /> of contamination in groundwater samples collected from MW-DIS-1 and <br /> MW-DIS-2 and the levels are so high the samples must be diluted by <br /> the laboratory prior to analysis. In the future, please note on <br /> groundwater monitoring result tables, samples that have been <br /> diluted. <br /> Del Tech' s field notes are not included in the quarterly report . <br /> Please provide PHS/EHD with Del Tech' s field notes for all past <br /> site work and include them in all future quarterly reports . <br /> Thank you for the receipts from Port Costa Materials . The total <br /> amount of soil generated from November 1994 through February 1995 <br /> was not provided nor was an explanation provided as to how the <br /> drill cuttings were shown to be clean or contaminated. The <br /> receipts indicate that 10 drums of contaminated water were <br /> received, if the drums were 55 gallon drums this would be 550 <br /> gallons of water. Pump test data indicates that 1000 to 1200 <br /> gallons of water should have been generated. Please clarify the <br /> tt amount of water generated during the pump test and amount of water <br /> f disposed of at Port Costa in the next quarterly report . Also <br /> report the disposition of the water purged from the monitoring <br /> wells prior to their sampling in all quarterly reports . <br /> PHS/EHD recently noticed that the soil boring and well completion <br /> logs for AS/SVE-1, AS/SVE-2, and NPI have start and finish dates <br /> for 1995 and this work was performed in 1994 . Please correct the <br /> dates on these logs accordingly. <br /> The schematic, for the new vapor extraction system does not indicate <br /> that there is instrumentation for measuring pressure or flow rates <br /> at the wellheads . This instrumentation should be included at the <br /> wellheads . Please provide PHS/EHD with the as built specifications <br />