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lam, <br /> 4� <br /> CAMBRIA <br /> August 17, 1999 <br /> l ,2: 37 <br /> Mr. Ronald Rowe <br /> San Joaquin County Public Health Services ENVIRONMENTAL HEALTH DIVISION <br /> Environmental Health Division 304 E. Weber Ave. Third Floor <br /> P.O. Box 388 P. O. Box 388, Stockton CA 95201-0388 <br /> Stockton, California 95201 Approved 2 . <br /> Denied E] <br /> Re: Site Investigation Work Plan Q/Conditions 5eAG-- co#Kwyz'"'S l3taAc3 <br /> Shell-branded Service Station <br /> 620 W. Charter Way Date q to 99 by <br /> Stockton, California l• $p' Iola looyQ Ll. LL4 QST C�6 <br /> Incident Number 98996187 r'ONTIAJUpU154.4 C,*.t--p • pNF, riw$T <br /> SAP Code: 136147 6e II45?y LL&-D NcAt'—s i iIl E7tS7�1zN <br /> SJCPHS Code: 1058124 P90 LA&/--- 0N-5t e V 5AMOUW(l) <br /> Z )P,Tj A 15 4 EST& 7#k-r- <br /> DearMr. Rowe: Ci12ouNp LSA—TLV- pW,nk: PQ'kS <br /> ''e, oy atIF•s t sE (Er�) +nom? <br /> •Si rE w►� /3E t? <br /> w <br /> As you requested, Cambria Environmental Technology, Inc. (Cambria) is submitting this Site <br /> Investigation Work Plan to define the extent of hydrocarbons in soil and groundwater at the site <br /> referenced above. This work is being conducted on behalf Equiva Services LLC. Cambria <br /> originally submitted a work plan in November 24, 1997; however, we did not receive written <br /> authorization to proceed and did not do so. Presented below are the site background including <br /> current site conditions and our proposed scope of work to complete this investigation. <br /> SITE BACKGROUND <br /> February 1989 Soil Borings: In February 1989, Delta Environmental Consultants (Delta) <br /> drilled soil borings SB-1 through SB-8 to assess site conditions prior to underground storage <br /> tank removal and replacement activities (Figure 1). <br /> November 1989 Tank Removal: In November 1989, four underground storage tanks were <br /> excavated and removed. Soil samples were collected from former tank and product line trench <br /> excavations. <br /> Oakland, CA <br /> Sonoma, CA December 1989 Well Installation: Between December 1989 and January 1990, Delta installed <br /> Portland, OR groundwater monitoring-wells MW-1 through MW-7. Underground piping was installed to <br /> Seattle, WA <br /> wells MW-2, MW-3, MW-4, MW-5, and MW-7 for future remediation. Two additional ground <br /> Cambria water monitoring wells (MW-8 and MW-9) were installed in March 1990. <br /> Environmental <br /> Technology, Inc. <br /> 1144 65th Street <br /> Suite 8 <br /> Oakland, CA 94608 <br /> Tel (510) 420-0700 <br />