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Mr. Ed Padilla <br />Page 2 <br />2. 'Page 19, Section 11.1.5 (Drainage)- To demonstrate adequacy <br />of final drainage design, a discussion of the impacts of <br />recent high rainfall events and seasons should be provided <br />and compared with the design event. In addition, the effect <br />of proposed FML installation in the pit area on drainage <br />should be assessed. (14 CCR 17778) <br />3. Page 21, paragraph 1- revise Final Plans to state that <br />"final design and construction quality assurance (CQA) plans <br />and specifications shall be submitted to the reviewing <br />agencies for approval." (14 CCR 17773 and 17774) <br />4. Page 27, Section 111.2.4 (Landfill Gas Monitoring)- Final <br />Plans state in paragraph 2 that if Phase 1 gas monitoring <br />shows "significant levels" of methane gas, a Phase 2 program <br />will be implemented. "Significant levels" should be defined. <br />A more detailed proposed Phase 2 program should be submitted <br />for approval, if necessary, with the Phase 1 final report. <br />In addition, if Phase 2 is necessary, monitoring of trace <br />gases should be conducted pursuant to 14 CCR 17783.9. <br />5. Page 15, paragraph 5- Given the discussion of <br />compressibility of auto shredder residue on page 16, <br />paragraph 3, relative compaction of 90% for the foundation <br />layer may be difficult to attain and should be noted. <br />6. Page 4, paragraph 2- permeability citation appears in error - <br />suggest deleting or correcting second sentence. <br />If you have any questions, please contact me at (916) 255-1198. <br />Sincerely, <br />4Scott Walker, Manager <br />Closure and Remediation Branch North Section <br />Permitting and Enforcement Division <br />CC: Dr. Gail J. Wiggett, Central Valley Regional Water Quality <br />Control Board <br />Mr. Tim Crandall, Kleinfelder, Sacramento <br />