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27 n <br /> . Transit Mix Concrete Co. <br /> analyses does not indicated a material type for topsoil. Please explain this discrepancy <br /> and revise the stability analyses model as needed. <br /> Response: The topsoil material color has been revised so that the cross-section matches <br /> the legend. <br /> 11. The Section F stability analyses models cross-section profile for Phase 5 — Closure does <br /> not match the cross-section profile for the F 1 stockpile as represented in Section B-B' on <br /> Figure C-9b. Please explain this discrepancy and revise the stability analyses model as <br /> needed. <br /> Response: Section F for closure has been revised to better reflect the closure surface and <br /> to match Figure C-9b. The stability analyses and report have also been updated with the <br /> stockpile configuration. <br /> 12. As stated in the Recommendations section of Hitch Rack Ranch Quarry Waste Stockpile <br /> Stability Analyses, dated August 29, 2017, please commit to performing a site specific <br /> investigation, such as test pits, completed at the footprint of F 1 to confirm overburden <br /> thickness, material characteristics, and groundwater conditions, and submit the <br /> investigation report for Division review and approval through either the technical <br /> revision or amendment process, to occur subsequent to the issuance of the permit. <br /> Response: Transit Mix commits to collecting the geotechnical information and revising the <br /> geotechnical assessment with the site-specific information. Transit Mix will submit for <br /> Division review the data and results as a technical revision or amendment. <br /> 13. As stated in the Recommendations section of Hitch Rack Ranch Quarry Waste <br /> Stockpile Stability Analyses, dated August 29, 2017, please commit to collecting and <br /> testing samples of the overburden and topsoil stockpiles and perform testing for <br /> strength to determine their actual parameters, and submit the material parameters report <br /> for Division review and approval through either the technical revision or amendment <br /> process,to occur subsequent to the issuance of the permit. <br /> Response: Transit Mix commits to collecting the geotechnical information and revising the <br /> geotechnical assessment with the site-specific information. Transit Mix will submit for <br /> Division review the data and results as a technical revision or amendment. <br /> 14. As stated in the Recommendations section of Hitch Rack Ranch Quarry Waste Stockpile <br /> Stability Analyses, dated August 29, 2017, please commit to collecting and testing <br /> samples of the fines stockpile material and perform testing for strength to determine their <br /> actual parameters, and submit the material parameters report for Division review and <br /> approval through either the technical revision or amendment process, to occur subsequent <br /> to the issuance of the permit. <br /> Hitch Rack Ranch Quarry(M-2017-049) <br /> Response to Comments—March 9,2018 <br />