Laserfiche WebLink
C 9 F <br /> i <br /> Advanced <br /> • <br /> GeoEnvironrnentat, Inc . =v= <br /> of Northern California <br /> 28 October 1997 9 <br /> AGE-NC Project No 95-0173 F^Cp[= V E D' <br /> OCT 2 9 1997 <br /> Ms Mary Meays ENVIRONMENTAL HEALTH <br /> SAN JOAQUIN COUNTY PHS-EHD PERMIT / SERVICES <br /> 304 East Weber A,,enue <br /> Stockton, CA 95202 <br /> Subject Revision to Work Plan Addendum- dated 25 August 1997 <br /> CALIFORNIA FUELS CARDLOCK STATION <br /> 2402 Pacific Avenue, Stockton, California <br /> Dear Ms Meays <br /> A Woi k Plan Addendum (dated 25 August 1997) was previously submitted to the San Joaquin <br /> County Public Health Services -Environmental Health Division (PHS-EHD) foi the advancement of <br /> one in-situ air sparging well (IAS) However, in response to your letter (dated 16 October 1997), <br /> Atli traced GeoEnvironmental, Inc (AGE) proposes the following revisions to the work plan <br /> 1) Installation of two dual completed IAS wells Locations of the IAS wells aie illustrated in <br /> Figui e 2 - ,Bile Plan A revised well constructions diagram is enclosed as Figure 3 - Propwecl <br /> In-Starr An Spaigmg Krell Diagi am <br /> 2) Histoiical ground water snaps (San Joaquin County Flood Control Distiict ) indicate ground <br /> water depth has been as low as 70 feet below site grade during underground storage tank <br /> usage Theretore, soil samples will be collected to a minimum depth of 70 feet bsg during the <br /> IAS well installation <br /> 3) Analysis of Ethylene Dibrornide will be added to the EPA Method 8260 sampling protocol <br /> 4) Installation of 2-inch diameter monitoring wells south, southeast and northwest of the site <br /> The proposed locations of the wells are illustrated in Figure 2 A well construction diagram <br /> is enclosed as Figure 4 - Proposed Dell Diagiarn Hotivever, due to the length of time <br /> iecluired to secure off-site access agreements and permits, the wells will be installed at a later <br /> . date Upon securing the necessary permits and/or access agreements, field acts%ittes will be <br /> scheduled with the PHS-EHD A report of findings for the well installation will be submitted <br /> in a quarterly report <br /> 1803 West March Larne, Suite A, Stockton, California 95207 <br /> Telephone (209)956-0264 FAX(209)956-0700 <br />