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i <br /> PUBLIC HtALTH SoP�u`�N•:C <br /> SAN JOAQUIN COUNTY z � <br /> ENVIRONMENTAL HEALTH DIVISION <br /> Karen Furst, M.D., M.P.H., Health Officer .c P <br /> 4�fFOR�� <br /> 304 East Weber Avenue, Third Floor • Stockton, CA 95202 <br /> 209/468-3420 <br /> FILECOPY <br /> DALE` BOYETT <br /> BOYETT PETROLEUM JUN 1 ¢ 999 <br /> P O BOX 1099 <br /> SALIDA CA 95368 <br /> Re: BOYETT PETROLEUM Site Code: 1433 <br /> 419 S. MAIN ST. <br /> MANTECA CA 95336 <br /> San Joaquin County Public Health Services,Environmental Health Division (PHS/EHD) has received <br /> and approved Work Plan for the Lateral and Vertical Extent of Contamination Addendum dated May 19, <br /> 1999 prepared by WHF,Inc. for the above referenced site. <br /> In a letter dated May 17, 1999, PHS/EHD directed you,the responsible party, to complete a well <br /> survey by June 5, 1999, and commence installation of the monitoring well installation as proposed in <br /> the work plan by July 5, 1999. WHF,Inc.stated they are unable to meet the well survey deadline. In a <br /> telephone conversation with WHF,Inc.staff on June 9, 1999, PHS/EHD agreed to extend the deadline <br /> for the commencement of the work proposed in the plan to July 15, 1999. <br /> Underground Storage Tank Preliminary Investigation Report of findings dated October 23, 1998 prepared <br /> by WHF,Inc. reported analytical results of the water sample collected from soil boring#1 at <br /> approximately 18 feet bsg as 47,000 parts per billion (ppb) of Methyl tert-Butyl Ether(MTBE). General-. <br /> geology of the site ranges from fine sand to gravel starting from surface to approximately 50 feet below <br /> surface grade (bsg) with occasional non-continuous layers of clay and silty-clay in between. No <br /> lithologic data in the vicinity of the site exists below 50 feet bsg. Due to the high concentration of <br /> MTBE detected in the grab ground water samples,the mobile nature of MTBE, and the high <br /> permeability of the soil in the area,there is a degree of urgency in the installation of the proposed <br /> monitoring wells. <br /> If you have any questions,please contact Jeffrey Wong at (209)468-0335. <br /> a Donna Heran,REHS,Director <br /> Environmental Health Division <br /> I <br /> ` Jeffrey Wong, REHS Margaretgorio,RENS rA <br /> LOP/Site Mitigation Unit IV Supervisor <br /> C: RWQCB, Central Valley Region-Mark List f <br /> C: WHF, Inc.-Bill Fox <br /> I <br /> i <br /> A Division of San Joaquin County Health Care Services <br /> i <br /> i <br />