SITE INFORMATION AND CORRESPONDENCE FILE 2

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.,or 1267 Country Club Boulevard This site may be ready for closure but there are several data gaps that will need to be completed prior to closure. Questions remain as to whether the tanks have been removed at the site or are still in place. Action item: Cambria should look at Tri-Regional Guidelines and evaluate whether all requirements for closure have been met. Additional discussion with the County will be required at this site. 2494 E Fremont This site is progressing satisfactorily. There is some question regarding the apparent changing direction of groundwater flow that may be related to other sources. The results of the investigation completed in June 2001 needs to be submitted to the County. 3011 Benjamin Holt Drive A preliminary investigation report (PAR) and a schedule of work need to be submitted for this site. The lateral extent of contamination has not been defined to the west and south. The County agreed to the request from Equiva and Cambria to discontinue sampling monitoring wells MW-1 and MW-2 for total petroleum hydrocarbons as diesel (TPHd). In the future, only monitoring well MW-3 will be analyzed for TPHd. 2575 Country Club Boulevard A PAR, a feasibility study, and a deep groundwater investigation need to be completed for this site. It is possible that the conclusions of the groundwater investigation may be that the source for the plume is not the Shell station. However, his has not yet been established. Ms. Petryna stated that Cambria is currently analyzing cross-gradient domestic well water samples on a quarterly basis. She stated that Equiva would like to have Cambria collect samples from the domestic wells on an annual basis and analyze for MtBE only. Mike Infurna provisionally agreed with this strategy and said that he would evaluate the data and provide a final conclusion. Action item: Mike Infurna will verbally provide final agreement/disagreement with new monitoring strategy after he has evaluated the data. 7190 Lower Sacramento Road The lateral and vertical extent of contamination in the area around the USTs seems to be defined but earlier work around the dispenser island resulted in a grab groundwater sample with 110,000 µg/1 TPH. The groundwater sample may be from a perched water table but that has not been determined. The lateral and vertical extent of the contamination associated with the dispenser island needs to be defined.