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• ENW"AMEN a.AL HEALTH DIVISION <br /> 30W.Wek3arA,,e. lihird Floor <br /> P.O. Box 388, Stockton, GA 9501-0388 <br /> Phone: (209) 468-3420 <br /> ®Approved <br /> Approved with changes: See Remarks <br /> ❑ Disappcoved: See Remarks <br /> Post-itW Fax Note 7671 Date q` a er Remarks IQ-�x r �� <br /> g 1 1 0 pages n1,1n:r onnA <br /> To JOInh(..,(l�N� From r ' // It� <br /> Co/Dept, LAt+GIZLfi�O Co.S-aL. eKS GR� nC1.C( IAA(YJI <br /> Phone R Phone a Date By , <br /> $ -033 <br /> Fax# $345- SK3 Fax# Approval of these plans extends only to that <br /> which is shown and described hereon but <br /> does not authorize or approve any omission <br /> August 24, 1998 or deviation of requirements of State laws or <br /> Local Ordinances. p <br /> Ms.Lori Duncan 6P L't Yotn�nr�c�Jot'E E li` <br /> San Joaquin County Public Health Services I _ <br /> GO <br /> Environmental Health Division sA�f I DE <br /> 304 East Weber Avenue,Third Floor <br /> Stockton,CA 95202 <br /> 60Y1 �t/a tnG� 1ln <br /> V4t�2� � <br /> Subject: Workplan for Subsurface Investigation <br /> 640 N.EI Dorado Street,Stockton,California <br /> Site Code: 1090 wp <br /> 5��-e. e�s>•.ctv�o <br /> Dear Ms.Duman: <br /> This letter report is submitted to present a proposed workplan to conduct a subsurface investigation �c(J�`- <br /> at the subject site (Figure 1). In correspondence dated June 2, 1998, San Joaquin County Public gncccsssttt����� <br /> Health Services,Environmental Health Division(PHS/EHD) requested a workplan be submitted by 5 (pp. <br /> July 24, 1998. Ground Zero Analysis,Inc.(Ground Zero)was granted a 30-day extension on behalf <br /> of the responsible party by Ms.Lori Duncan of PHS/EHD. <br /> The general scope of work will consist of drilling and sampling four soil borings in the vicinity of the <br /> former underground storage tanks(UST)to investigate the vertical and lateral extent of residual soil <br /> contamination, collecting a discrete groundwater sample from one boring to determine if r_r_Q 0bS4/1V0V(-�C' %S owa <br /> groundwater has been impacted, and preparing a technical report that summarizes the methods and <br /> L4/1 itA�imt <br /> results of the investigation. <br /> PIDnQet� <br /> BACKGROUND <br /> The site previously operated as an automotive sales and service center and utilized one 250-gallon <br /> UST for storage of waste oil. The UST was removed under permit from PHS/EHD on March 26, <br /> 1997. A soil sample collected from beneath the tank contained elevated levels of petroleum <br /> hydrocarbons, lead, and chlorinated solvents. Analytical results are summarized in Table 1. <br /> Groundwater beneath the site is expected to be encountered at approximately 25 to 30 feet below <br /> ground surface(bgs), based on historical information available from the San Joaquin County Flood <br /> Control and Water Conservation District. 6y i CP 0101 G� l CAI-' �'( <br /> R/KI�( J,�ll�o��-fy+-cry <br /> pbWd wsns9a.a s \ v_ �ti 4 <br />