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Ms . Bazeley <br /> June 5 , 1996 <br /> Page 4 <br /> (2) Pages 11 and 12 . "Stabilization period" . Mass removal <br /> rates do not vary by more than 2a during four weekly monitoring <br /> events and when VOC vapor concentrations do not vary by more than <br /> 20% over four weekly monitoring events . <br /> DTSC Comment : As stated in DTSC comment #2 , the 20o VOC <br /> vapor concentrations variation should be changed to 2% so that it <br /> will be consistent with the proposed 211 removal rates . <br /> 9 . Figures to illustrate the hypothetical scenarios for the SVE <br /> operations need to be provided as required in the DTSC' s April 4 , <br /> 1996 letter. <br /> If you have questions, please call me at (916) 323-3372 or <br /> Mr. Jerry Marcotte at (916) 322-9224 . <br /> Sincerely, <br /> U�iC vt, <br /> Jean Young <br /> Hazardous Substances Engineer <br /> Site Mitigation Program <br /> cc : Attached service list <br />