Laserfiche WebLink
Steve Ronzone <br /> Page 3 <br /> Analysis for these bacteria should be included in the proposal . <br /> The proposal should be submitted to PHS/EHD by September 1, 1995, <br /> for their review and comment, so the study can begin October 1, <br /> 1995 . <br /> CH2M Hill presented a table indicating the cost of remediation with <br /> an expanded air sparge/soil vapor extraction (AS/SVE) system was <br /> much higher than intrinsic bioremediation with the current AS/SVE <br /> system. The time to achieve background levels of contamination was <br /> shown to be greater than 30 years for both alternatives. PHS/EHD <br /> has observed sites remediated to background or near background <br /> levels in 5 to 6 years using vapor extraction. Therefore, it is <br /> the opinion of PHS/EHD, that the cost shown for an expanded AS/SVE <br /> system is too high. In addition, the radius of influence of the <br /> air sparge and vapor extraction wells has not been determined, so <br /> the number of additional wells required to remediate all of the <br /> contamination is not known. <br /> There was discussion about future reimbursement from the SWRCB <br /> Cleanup Fund Program for the site investigation and remediation. <br /> PHS/EHD recommends that you contact George Lockewood with the SWRCB <br /> Cleanup Fund Program at (916) 227-4424 , to discuss pre-approval of <br /> any proposed work, obtain approved cost estimates for work and to <br /> ascertain whether the costs of the "Intrinsic Study" work is <br /> eligible for reimbursement . <br /> If you have any questions or comments contact Margaret Lagorio at <br /> (209) 468-3449 . <br /> Donna Heran, REHS, Director <br /> Environmental Health Division <br /> Margaret Lagorio, Lead Senior REHS Diane*Hinson,Hinson, REHS <br /> Site Mitigation Unit Supervisor <br /> ML <br /> c : Del Monte - Soon Kim <br /> c : PARMACEAST - W L Simmons <br /> c: CH2M Hill - Bern Baumgartner <br /> c : CVRWQCB - Beth Thayer <br /> c : SWRCB - George Lockewood <br />