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D <br /> Chevron USA Inc. <br /> Page 2 <br /> Review of -Work plan-Submitted_March_ 17, x989 and Addendum 5-30-89: <br /> I. The plan addendum does not propose a sampling plan of soils <br /> during construction of the borings. Plate 2 was not <br /> included in the workplan. <br /> We recommend at least one continuous core drilling in order <br /> to illustrate, in cross-sectional diagrams, the site <br /> stratigraphy. <br /> 2 . Chevron shall complete and return the "Authorization to <br /> Release" form. <br /> a <br /> 3 . Resubmit the monitoring well permit with the appropriate <br /> signature of the driller or the driller's agent. <br /> 4 . Attached is the Minimum Laboratory Verification chart for <br /> reference in preparing the sampling plan for soils and <br /> ground water. <br /> 5. Guidance documents for use in preparing workplans and <br /> subsequent assessment reports are the LUFT Field Manual and <br /> Tri-Regional Boards Staff Recommendations. <br /> These concerns shall be addressed in 'a revised workplan or ! <br /> addendum for continued field investigative work. This work plan <br /> shall be submitted to San Joaquin Environmental Health Division <br /> and the Regional Water Quality Control Board of concurrent review <br /> no later than August 28, 1989. <br /> 1 <br /> If you have any questions, please contact Diane Hinson of my I <br /> staff at 468-3450 <br /> Jogi Khanna, M.D. , M.P.H. r <br /> Hee Of icer <br /> r8onalinot�i,Director <br /> Environmental Health Division <br /> RV/DSH:ma <br /> 1 <br /> cc: RWQCB-G. Boggs: w/attachments . <br /> Dames & Moore: w/attachments <br /> J. Palmer <br /> 1 <br /> s <br />