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A 7 <br /> NV <br /> E IRON ENTAL HEALTH DEPAJALWY <br /> SAN JOAQUIN COUNTY <br /> Q <br /> :? Unit Supervisors <br /> .A Donna K.Heran,R.E.H.S. P <br /> Director 304 East Weber Avenue, Third Floor Carl Borgman,R.E.H.S. <br /> Al Olsen,R.E.H.S. $tOCI{tOri, California 95202-2708 Mike Huggins,R.E.H.S,R.D.I. <br /> " Douglas W.Wilson,R.E.H.S. <br /> • cq:.Foai;�c• Program Manager Telephone: (209) 468-3420 Margaret Lagorio,R.E.H.S. <br /> Laurie A.Cotulla,R.E.H.S. <br /> Program Manager Fax: (209) 464-0138 Robert McClellon,R.E.H.S. <br /> Mark Barcellos,R.E.H.S. <br /> GIL MOORE PRESIDENT <br /> NEW WEST PETROLEUM JUL 15 2005 <br /> 1831 I6Tn STREET <br /> SACRAMENTO CA 95814 D <br /> 0 <br /> RE: Shell Branded / New West Gas #1003 RO#/Site Code: 1705 <br /> 6437 W. Banner Avenue <br /> Lodi, CA. 95242 <br /> On March 9, 2005, San Joaquin County Environmental Health Department (EHD) <br /> notified you that the above referenced site was placed in the Local Oversight <br /> Program (LOP) as a result of the Unauthorized Release Form (March 3, 2005) <br /> that was filed due to ground water contamination noted in the monitoring well <br /> (MW-19a and MW-19b) placed approximately thirty feet southeast (down <br /> gradient) from your underground storage tanks (UST). <br /> In phone conversations with you and Michael Infurna of EHD just prior the March <br /> 9, 2005 LOP notification, you were advised that a work plan to conduct a ground <br /> water investigation for the lateral and vertical extents of the petroleum plume was <br /> due at EHD within 60 days. As of the date of this letter, the work plan has not <br /> been received. <br /> The presence of a community service well (CSA) down gradient of your UST <br /> system combined with the unknown extent of your petroleum plume are of great <br /> concern to EHD and the Central Valley Region Water Quality Control Board <br /> (CVRWQCB). <br /> You are hereby directed to submit a work plan for the placement of <br /> monitoring wells on the above referenced site and between the site and the <br /> CSA wells within 200 feet of the USTs at the site by July 29, 2005. The work <br /> plan should include the collection and analysis of soil samples for Total <br /> Petroleum Hydrocarbons as gasoline (TPHg), BTEX, and the fuel oxygenates by <br /> EPA Method 8260B. Existing ground water data from monitoring wells placed at <br /> and down gradient of your site indicate that the ground water is impacted at the <br /> first ground water level and the next deeper zone, approximately 40-45 feet <br /> below ground surface. Your soil investigation and the placement of monitoring <br /> well screens should include these separate zones. <br />