1994-11-08_REVISION - M1980244 - Laserfiche WebLink

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~: N17~18'94 1802 No .009 P.04 You are also in receipt of our letter of October 24, 1994 in which we directed no dozer movement without Golder Associates' approval. Then, though we have not completed writing the response required by Dr. Pendlecon's November 2, 1994 memorandum from which this recommendation originated, we have directed routine evaluation of the source of Pad >y2 nutterial by Golder Associates QCA personnel as well as specific instructions to loader operators to avoid, or place aside, azeas of Pad Jig material that wntain excessive oversize rocks (> 1.5 inches). This sourcescontrol procedure is based on the results of four additional grain size sieve analyses conducted as QC samples of the material exposed on the active face of Pad 112. The sampling technique and locations were as directed by Dr. Pendleton. A11 tour samples were with specifications. The test data are being submitted with our letter responding to Dr. Pendleton's memorandum. All steps required as a result of Dr. Pendleton's memorandum and visit have been completed as has been discussed with you and other inspectors. As we discussed, not only is this request a return to our originally-accepted proposal to use Pad N2, but it also allows use of more ma'~erial that is generally smoother or more rounded than is freshly-crushed ore. Interface testing of both Pad N2 material and the Cresson ore has been successfully conducted. Approval of this request would allow CC&V to immediately cover the PLS with a protective 3-foot layer. CC&V also wishes to note that this change of source should extend to the Select Drain Cover Fill that is specified to surround the riser pipes. The numeric technical specification identifies the source of this crushed and screened material, as does the text of the CONSTRUCTION QUALITY ASSURANCE (CQA) PLAN, as the Cresson Mine. While that may yet be the case, it would be prudent to allow the source to also be Pad 112. The technical specification for this material would continue to be as approved. That existing specification is repeated below. 7. Select Drain Cover Fill -processed, free draining, poorly graded Cresson Ote placed azot:nd the vertical riser pipes conforming to the following SPECIFICATIONS: U.S. Standard Percent Passing Sieve Size by Dry Weight 1-inch 100 3/4-inch 30 - 70 1/2-inch 0 Plasticity Index: 0 In view of your request that this be submitted as a Technical Revision to the subject permit, the fee for z Technical Revision, in the ar,:ount of 5875, is enclosed. 3