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Dividend Development Corporation October 23, 1991 <br /> Addendum Remediation Workplan, Page 6 <br /> Biotreatment of the. contaminated soils is expected to proceed over <br /> a duration of four (4) to six (6) months. Biotreatment progress <br /> shall be periodically monitored by analyzing representative samples <br /> from the treated soil for Total Petroleum Hydrocarbon (TPH) content <br /> using EPA Test Method- 418. 1. . - <br /> In <br /> ethod418. 1. .In addition to periodic progress analysis or soils, approximately <br /> eight (8) to twelve (12) representative confirmatory soil samples <br /> shall be analyzed from the biotreated' soils prior to cessation of <br /> biotreatment operations. These soil samples shall be analyzed <br /> using both EPA Test Methods 418. 1 (TPH) and 8020 (BTXE) . <br /> j <br /> CLOSING COMMENTS: <br /> TTI hopes that the aforementioned additiones to the workplan are <br /> agreeable to the RWQCB.. If any .questions arise, , please contact <br /> Adam Zipp, Ph.D. - at 114/668-1669. <br /> The memorandum from . Mr. Higgins mentioned the eventual intent of <br /> the RWQCB to question Santa Fe Pacific Pipeline Partners LTD about <br /> the possible petroleum,hydrocarbon- contamination coming from their <br /> _property, which is located hydrologically up-gradient from Tracy <br /> North. This action is supported. <br /> Sincerely, <br /> Toxic Techno-logy, Inc. <br /> Adam P. Zip , Ph. D. <br /> Chairman <br /> JF/cjt <br /> Enclosure <br /> cc: Mike Higgins <br /> RWQCB <br /> j <br /> Toxic Technology, Inc. <br />