WORK PLANS - Laserfiche WebLink

Home Browse Search

Environmental Bio-Systems,Inc. www.ehsinfo.com Since 1989 , 707 View Point Road Mill Valley, CA 94941 TEL: 415-381=5195;FAX: 415-381-5816; e-mail- augerpro@sbcglobal.net . "Quantification of the potential impacts of other remediation technologies on ISCO effectiveness may be supported by collecting and sending in specific samples for laboratory analytical and bench-scale tests prior to completing the ISCO feasibility analysis or design. The types of analytical tests will vary depending on the chemicals j known or suspected of being utilized previously or expected to be used,the type of ' oxidant potentially to be used, and the local geology/geochemistry." "The difficulty in using bench-scale studies to estimate field-scale oxidant demands may be explained by the high degree of subsurface heterogeneity and the oxidant demand testing protocol"(page 51). • There are no standards for bench testing,nor are detailed methodologies described in the ITRC document (ITRC, .2005): The ITRC guidance manual has been reviewed and procedures will be performed in a similar manner to the ITRC In- Situ Chemical Oxidation guidance document (ITRC.com). Bench testing details Details:on injection of oxidants will not be described in the bench test workplan or addendum (this letter), as the results of the bench tests may preclude the use of ozone. If ozone is selected as a remedial option, details on the methods, and variations (if any) from the ITRC description, will be noted. I • With ozone, pH adjustment is typically not a major concern, as it is for Fenton's Reagent. Nonetheless, EBS will note the quantities of acids, or.other chemicals, to be utilized for pH control.and the expected impact on water quality; i • EBS agrees that the ozone bench-scale test and microbiological bench-scale test j results can be reported in the same report of findings with a recommendation of both, one or the other, or neither, for potential use on the site. • Bioaugmentation is rarely recommended until the full evaluation of the I indigenous microbial communities is evaluated and, tested in the laboratory and in the field. A detailed description and justification of bioaugmentation, if warranted,will be submitted to the appropriate regulatory agencies for review and , approval; prior to any bioaugmentation, process. Bioaugmentation is not li recommended at this time. i Please call me at 415-.381-5195 if you have anyquestions. Sincerely, James A. Jacobs, P.G.#4815, C.H.G.#88 Chief Hydrogeologist f Main Office:229 Tewksbury Ave.,Point Richmond,CA 94801 Tel:510-232-2728;Fax:510-232-2823;May 20,2006 4