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ENVIROI`vMENTAL HEALTAEPARTMENT <br /> SAN JOAQUIN COUNTY <br /> Donna K. Heran, R.E.H.S. Unit Supervisors <br /> Director 304 East Weber Avenue,Third Floor Carl Borgman,R.E.H.S. <br /> Laurie A. Cotulla, R.E.H.S. Stockton,California 95202-2708 Mike Huggins, R.E.H.S., R.D.I. <br /> o.. v Program Manager k Telephone: (209)468-3420 Douglas W. Wilson, R.E.H.S. <br /> ani g'6 V ` Margaret Lagorio,R.E.H.S. <br /> Fax: (209) 464-0138 Robert McClellan, R.E.H.S. <br /> Website: www.sjgov.org/ehd/ Jeff Carruesco, R.E.H.S. <br /> GIL MOORE PRESIDENT JUN 1 6 2006 <br /> NEW WEST PETROLEUM <br /> 1831 16TH STREET <br /> SACRAMENTO CA 95814 <br /> RE: Shell Branded / New West Gas #1003 RO#/Site Code: 1705 <br /> 6437 W. Banner Avenue SWRCB-CUF#: 018534 <br /> Lodi, CA. 95242 <br /> San Joaquin County Environmental Health Department (EHD) has been notified <br /> that county service area 31 (CSA-31) well #2 cannot be used because the pump <br /> requires repair. As a result, CSA-31 well #1 will be the only well in use in the <br /> area until CSA-31 well #2 has been repaired and returned to service. <br /> CSA-31 well #1 is closest to the petroleum plume emanating from the Flag City <br /> Shell service station. The increase in ground water pumping rates at this well <br /> may change the flow direction and migration of the contaminant plume. <br /> In order to evaluate the affects of increased pumping at CSA-31 well #1, EHD is <br /> directing you to sample CSA-31 well #1 on a weekly basis and analyze at a <br /> minimum for MtBE and TBA starting immediately. In addition, MW-4B and MW- <br /> 6C are also to be sampled weekly and analyzed at a minimum for MtBE and TBA <br /> starting immediately. <br /> This sampling requirement may be conducted at the same time the weekly <br /> ground water batch sampling is conducted. The weekly sampling requirement for <br /> these wells is to continue until otherwise directed by EHD. <br /> Please forward the laboratory results to EHD as they are provided to you. <br /> On May 8, 2006, EHD approved the work plan to install additional monitoring <br /> wells. As of the date of this letter the work has not been completed. A Well <br /> Permit Application Form and fees have been submitted for a portion of the work. <br /> Permits and fees for the remaining work are to be submitted to EHD by <br /> June 30, 2006 and the work is to be completed by July 21, 2006. <br />