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09/14/2004 10:45 2094671118 AGE STOCKTON PAGE 04/04 <br /> Advanced <br /> GeoEnvironm' ental, Inc.- <br /> ,14 <br /> nc,14 September 2004 <br /> AGE-NC Project No. 970290 <br /> Ms. Lori Duncan <br /> San Joaquin County Public Health Services- Environmental Health Division <br /> 304 East Weber Avenue, Third Floor <br /> Stockton, CA 95202 <br /> Subject: Soil Vapor Extraction Results and Modifications <br /> Lodi Theater.Project <br /> 1.07 North School Street,Lodi,California <br /> Dear Ms. Duncan: . <br /> As part of the progression of the A.dvan.ced GeoEnvironmcntal,Inc. (AGE)implemented soil vapor <br /> extraction and. air-sparging prograrn at the site, a general reduction in concentrations of volatile . <br /> hydrocarbons has been achieved(attached).11n order to determine the total remediation effectiveness <br /> AGE recommends discontinuation of SVE for a one month hiatus, followed by SVE rebound <br /> response analysis. The ana.lysis will. consist of an SVE restart in thirty days, accompanied by two <br /> SVE mon.itoring events; one at the restart and one 4$-hours foIlowi,ng the first monitoring event_ <br /> The SVE and TAS units Will Tremain at the site, while the carbon canisters for adsorption will be 1 � <br /> demobilized from the site.Any necessary modification or declination.of the San Joaquin Valley Air �< � <br /> Pollution Control District permit will be conducted. Progress and operati.oll of the vacuum blower <br /> SVE system,after the rebound response analysis will be evaluated on.a monthly basis,if necessary, h'1 <br /> Monitoring and sampling would continue as cutrently underway(monthly), if required. <br /> �w� <br /> If you have any questions or comments,please contact our office at (209)467-1,006.0 _I" kclt ( �OVA <br /> Sincerely, <br /> Advanced GeoEnvironmental,Inc. <br /> A . <br /> William R. Little <br /> Senior Project Geologist <br /> California Registered Geologist No 7473 <br /> cc: Lodi. CC12, LLC <br /> 837 Shaw Road,Stockcon,CaliFornia 95215 <br /> Telephone(2'09) 467-1006 FAX(209)467-1118 <br />