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PUBLIC YrIEALTH SERVICES Q�,N <br /> SAN JOAQUIN COUNTY <br /> z- <br /> ENVIRONMENTAL HEALTH DIVISION ;; '{ <br /> Ernest M. Fujimoto, M. D., M.P.H., Acting Health Officer '• <br /> 304 E. Weber Ave., Third Floor • P. O. Box 388 • Stockton, CA 95201-0388 <br /> 2091468-3420 L ��,) LF � <br /> JOHN CERVANTES <br /> JC TRUCKING M LED NOV 2 91995 <br /> PO BOX 6008 <br /> STOCKTON CA 95206-0008 <br /> Re: JC Trucking Site Code: 2571 <br /> 1207 South Aurora <br /> Stockton CA <br /> San Joaquin County Public Health Services, Environmental Health Division (PHS/EHD) <br /> has completed review of the "Workplan Soil Characterization" dated September 1995 <br /> and prepared by PC Toxics. PHS/EHD has the following comments for your <br /> consideration. <br /> PHS/EHD has evaluated the site based on seasonal high depth to groundwater (35 feet in <br /> 1986) and determined that a groundwater investigation will be necessary. The work <br /> plan suggested that nine soil borings would be drilled, using an 8 inch auger or larger, to <br /> investigate the extent of soil contamination. The work plan did not propose the <br /> conversion of any borings to monitoring wells, in order that groundwater could be <br /> investigated. <br /> PHS/EHD recommends that should you wish to initiate a soils only investigation that <br /> push-point technology be used to lessen the cost of investigation. Also, the proposed <br /> locations of soil borings may not be adequately placed to characterize the subsurface <br /> migration of contamination. The distribution of contamination at approximately 11 feet <br /> below grade suggested that eastern areas of the tanks were more heavily contaminated. <br /> Hence, in order to assess the vertical distribution of the contamination, soil borings <br /> should be drilled in those areas. Also, the site map provided was not to scale. Please <br /> submit in addendum a map to scale. <br /> Please provide information regarding the disposal of the stockpiled soil that evidenced <br /> petroleum hydrocarbon contamination. <br /> Also note that the samples collected for submittal should be submitted to a laboratory <br /> which has been certified by the State of California Department of Health Services. The <br /> analytical results summarized in Table 1 failed to note the detection limits which were <br /> achieved in samples with no detection. Please submit an amended table reflecting the <br /> detection limits which were achieved. <br /> A Division of San Joaquin County Health Care Services <br />