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Mike Infurna [EH] From: Richard Dreessen [dreessen@geoconinc.com] Sent: Monday, March 10, 2008 1:40 PM To: Mike Infurna [EH] Subject: Ranch Market Attachments: GW &Analytical data TABLES list qtr. 2008.xis; E8323-fig.4 1Q08.pdf; E8323-fig.2 1Q08.pdf QI am at GW&Analytical E8323-fig.4 E8323-fig.2 data TABLES Ss... 1Q08.pdf(179 KB) 1Q08.pdf(104 KB) I am attaching the 1st Qtr. Analytical table and concentration map. Both show presently that the downgradient well MW-7 has the highest concentration. This well has always had anomalously high values. This well is on the property we need access so that we can perform the investigation proposed last year. According to the county assessor, this property was the site of a gasoline service station and garage up into the 1970-s. MW-7 was installed as a downgradient well for the Ranch Market site and not to investigate this property. It was unknown at that time that the property used to be a gasoline station. It is interesting to note that the assessors maps indicate a tank which was subsequently covered by an additional to the building. It is unknown whether the tank was removed back then. The intent of the additional investigation is to, 1) define the subsurface stratigraphy in enough detail to explain whether we are dealing with one long pencil shaped plume or two plumes, one for each gas station, and 2) gain information for a possible ORC type injection program at Ranch Market to remediate the proper contaminant layers. Our investigative approach, which was approved by the county last year, is to conduct a Membrance Interface Probe by direct push for stratigraphic control and to take water samples at TD. This is more fully explained in the workplan of last year. The First quarter report is finished and undergoing review. All wells were samples, where last time only the drinking water wells were sampled. Rick Dreessen Senior Geologist Geocon Consultants, Inc. 1