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Page 2 <br /> McBilllrn Real Estate Investment Property September 13 , 2012 <br /> 2154 South El Dorado Street <br /> Stockton , California 9520E <br /> Assuming petroleum hydrocarbon contamination is detected at this site, AGE proposes to install <br /> monitoring wells, screened between 20 and 40 feet bsg , to total depths of 40 feet bsg using a <br /> CME-75HT drill rig while collecting soil samples at five-foot intervals . AGE proposes to submit <br /> an addendum to this work plan with the proposed number and locations of monitoring wells <br /> based on the findings from the initial investigation. <br /> The EHD has reviewed the soil analytical results included in this work plan from the UST <br /> removals completed in October 2010, and the groundwater analytical results submitted in Phase <br /> 11 Environmental Site Investigation, dated 14 July 2008 , prepared by ROKEN Engineering <br /> Services. The EHD recommends that the proposed borehole northeast of the former 7 , 500- <br /> gallon UST and northwest of the former 3, 000-gallon UST be relocated west of the former <br /> southern-most 1 ,000-gallon UST. This recommendation is based on soil samples collected at 9 <br /> feet bsg at the west side of the former southern-most 1 , 000-gallon UST where significant <br /> concentrations of petroleum hydrocarbon contamination were detected , and grab groundwater <br /> samples collected from sample location GW-8 near the southwest corner of this site during the <br /> phase 11 investigation where high concentrations of contaminants of concern were detected . <br /> With this condition , the EHD approves the advancement of the initial four proposed soil borings . <br /> - - - <br /> Please submit a boring permit application; Master File Record form, and permit/inspection fee o <br /> $500 . 00 to the EHD and complete the field work by 13 November 2012. Submit the report of <br /> findings to the EHD within 60 days of completing the field work. <br /> The EHD will not comment on the three proposed additional soil borings, or the proposed <br /> monitoring wells until the report of findings from the initial investigation is submitted to this <br /> agency. <br /> Please contact Vicki McCartney at (209) 468-9852, or by email at vmccartnevpsicehd. com if <br /> you have any questions regarding this letter. <br /> Sincerely, <br /> Victoria L. McCartney, REHS Nuel C. Henderson , Jr. , PG <br /> Senior Registered Environmental Health Department Engineering Geologist <br /> c: Mr. James L. L. Barton, PG , California Regional Water Quality Control Board Central Valley <br /> Region, 11020 Sun Center Drive, Suite 200 , Rancho Cordova , California 95670 <br /> Mr. Timothy J . Cuellar, Advanced GeoEnviron mental , Inc. , 837 Shaw Road , Stockton , <br /> California 95215 <br />