Laserfiche WebLink
r ' <br /> Upgradient*-)Environmental C( sultants <br /> May 1, 2003 <br /> Mr. Tom O'Neill ������D <br /> Valley Motors . . <br /> P. O. Box 923 MAY 0 2 2003 O <br /> Stockton, CA 95201 <br /> ENVIRONMENT HEALTH <br /> J <br /> Subject: Report Transmittal PERMIT/SERVICES . <br /> Dear Tom: <br /> We have completed the drilling, groundwater monitoring, and laboratory work authorized <br /> under our proposal No. 99018.1 and 99018.5. and are pleased to forward our report <br /> herewith. Four new monitoring wells were installed in April, including three in the City <br /> of Stockton right-of-way on the west and north sides of your property. Ten soil samples <br /> were collected for laboratoryanalysis,and no petroleum hydrocarbons were detected. <br /> The new on-site well was dry when we monitored the groundwater on April 15, but <br /> samples were collected from the other seven wells. Six of them contained gasoline <br /> hydrocarbons, implying that groundwater beneath Main Street is contaminated.However, <br /> the analytical data from the wells on Main Street cannot easily be accounted for by the <br /> groundwater flow direction at the site, and we cannot identify with certainty the source of <br /> the hydrocarbons in those wells. In our report we have recommended doing some <br /> additional investigation, in the form of file reviews at City offices, to determine_whether <br /> an unknown off-site source might be present in the area. We have also recommended <br /> performing short-term interim soil remediation in well VT-1 on the Valley Motors <br /> property during the coming dry season, when the subsurface soil would be amenable to <br /> soil vapor extraction. If San Joaquin County Environmental Health Department concurs <br /> with that recommendation,we will prepare a cost estimate in the near future so that you <br /> may obtain pre-approval from the State Underground Tank Cleanup Fund. <br /> Please call our office if you have any further questions. <br /> j <br /> Sin erely, <br /> ictor B. Cherven, Ph. D. <br /> Principal Geologist <br /> Attachment <br /> i <br /> Cc: Michael Infurna, EHD <br /> Marty Hartzell, Regional Water Quality Control Board <br /> Stockton: P.O. Box 8002, Stockton, CA 95208 (209) 772-3620 <br /> Cameron Park: 3369 Kimberly Road, Cameron Park, CA 95682 (530) 677-3055 <br />