Laserfiche WebLink
RAMAGE <br /> ENVIRONMENTAL I-f,l 7` Sa`cr'amento Office <br /> is 9 U,� _'9 pl4f40 ntova Way, Suite 200 <br /> Rancho Murieta, CA 95683 <br /> + Tel�(95A;­3250 V <br /> ENVIRON r l l �`r. <br /> IVISION <br /> June 5, 1998 304 E Weber Ave Third Floor <br /> P 0 Box 388,Stockton, CA 95201-0388 <br /> Phone (209)488-3420 <br /> Mr Harlan Knoll, Sr R E H SWApproveo <br /> FACgIIMILE AND REGULAR MAIL <br /> San Joaquin County PHS/EHD <br /> 304 East Weber Avenue, 3'd Floor ®Approved with changes See Remarks <br /> Stockton,CA 95201-0388 ® Disapprovrd See Remarks <br /> Rem <br /> S W R- <br /> Re Addendum to PAR/CAP Submittal a <br /> San Joaquin Catholic Cemetery, Stockton, Cahf <br /> USTCF Claim#1092 <br /> Date 1 gY <br /> Dear Mr Knoll <br /> Approval of those plans extends only to that <br /> It was a pleasure to speak with you this week regarding y '�`l". l 1T1 PPgV14 s W&g15���ifeirtn but <br /> Q1 or approve any Omiss'O l <br /> Assessment Report and Corrective Action Plan (PAR/CA C C18V1a I Ufr@mentS of State laltdS or <br /> oCC 4 dmanncm <br /> The CAP portion of the PAR/CAP outlined proposed met�odsor the implementation of soil vapor <br /> . extraction(SVE) via existing wells VW-1, VW-2, VW-3 and VW-4 The technical basis for the SVE <br /> design criteria was data obtained from a previously performed vapor extraction pilot test In addition,the <br /> CAP portion of the PAR/CAP also proposed the design,permitting and implementation tasks necessary <br /> to initiate SVE and remove source gasoline hydrocarbons from beneath the subject site investigation <br /> area <br /> In response to your comments, this addendum document addresses the following concerns <br /> • A comparison of other remedial technologies on a performance and cost basis <br /> • The integration of air sparging into the proposed CAP <br /> REMEDIAL TECHNOLOGY COMPARISON <br /> This portion of the addendum briefly describes other remedial technologies that were evaluated prior to <br /> selecting SVE as a hydrocarbon source removal technique for the subject site <br /> Direct Excavation <br /> The removal of soil impacted with gasoline hydrocarbons would require extensive excavation adjacent to <br /> the mausoleum building to a minimum depth of approximately 40 feet below ground surface(bgs) While a <br /> detailed cost estimate was not developed for this option, a remedial excavation program would require 1) <br /> the installation of a shoring system, 2)excavation of approximately 5,000 cubic yards(cy)of soil beyond <br /> and beneath the mausoleum structure, 3)on-site treatment of excavated soil(or offsite disposal)and 4) <br /> backfill and compaction of the excavation Ramage Environmental estimates that such a program would <br /> • cost approximately$100-$120/cy or about $500,00-$600,000 For obvious economic reasons,this option <br /> was not given further consideration <br />