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I <br /> DANTE NOMELLINI <br /> PAGE 2 <br /> engineering calculations used to determine the design specifications , to PHS- <br /> EHD by March 18 , 1996 . The design specifications should include the specific <br /> locations and construction details for any additional remedial wells needed (these <br /> should also be presented in cross-section format) . <br /> The comments made regarding the regulatory unacceptance of bioremediation <br /> technology is correct but the unacceptance of this technology is mainly due to the <br /> absolute uncertainty of the overall effectiveness of bioremediation when compared to <br /> other remedial technologies , especially at sites with gross contamination . In addition , <br /> the constant regulatory diligence at sites where this technology has been proposed <br /> has revealed several bogus companies promising bioremediation effectiveness that <br /> ultimately proved costly and untrue . Therefore , before bioremediation is approved for <br /> use at this site , an evaluation as to its effectiveness specific for this site will be <br /> required and all monitoring needed to confirm this evaluation will be mandatory . <br /> PHS- EHD will initiate public participation for this site, as required pursuant to the <br /> Corrective Action Regulations , after the receipt of an acceptable addendum to the <br /> CAP . <br /> If you have any questions or wish to discuss this letter in more detail , please contact <br /> Linda Turkatte , Senior REHS , at (209) 468-3441 . <br /> Donna Heran , REHS , Director <br /> Environmental Health Division <br /> 4 a <br /> Linda A. Turkatte , Senior REHS Diane M . Hinson , REHS <br /> Site Mitigation Unit Supervisor <br /> Enclosure <br /> c: CVRWQCB , Beth Thayer <br /> c: SWRCB Cleanup Fund , George Lockwood <br /> c : Advanced GeoEnviron mental , Kevin McKibben <br />