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STATE C~ CGIII IIIIIIIIIIIIIIIJ <br />DIVISION OF MINERALS AND GEOLOGY <br />I)cpenmrN of N.~nu,il KcN rurcc~ <br />I t l i $hrrm,ln til., Kunm ! I S <br />Ornvrr, CnlnruJu NI1 41 t <br />VhuM•'. 1111 41 156h- 45b i <br />F/1X' I t0 b II {!.171110 <br />November 12, 1997 <br />Martin Jones <br />Western Aggregates, inc. <br />11728 .Hwy 93 <br />Boulder, CO 80303 <br />RE: Western Aggregate Pits -Weed Control, Corrective Actions <br />Permit No. M-94-045 Section 16 Sand & Gravel Pit <br />Permit No. M-88-108 Lightweight Aggregate Mine & Plant <br />Deaz M r. Jones: <br />I~~~~ <br />I~EPAIITMENT OF <br />NATURAL <br />RESOURCES <br />kny Rnnier <br />Grnwnnr <br />lanu•~ ti. Luchhrad <br />Ev~ue.r Ding ou <br />Mu harl y EunX <br />u~~~.~nn o~r~rn, <br />In response to recent discussions between you and the Division concerning corrective actions <br />listed itt the Division's October 2l, 1997 inspection reports for the Section 16 Sand & Gravel Pit <br />and the Lightweight Aggregate Mine & Plant, I have listed below a clarification of the requested <br />corrective actions. It is the Division's position that these corrective actions are necessary to <br />ensure I:llat the permitted sites aze in compliance with Rule 3.1.10(6) of the Construction Material <br />Rules 8: Regulations. I have attached a copy of Rule 3.1.10(6) for your review. <br />CORRECTIVE ACTIONS <br />Western Aggregates, Inc. will submit an application for a technical revision for each permitted <br />site by December 3l, 1997 which consists of a weed management plan for diffuse knapweed and <br />any other prohibited noxious weed species present at the Section 16 Sand & Gravel Pit and the <br />Lightweight Aggregate Plant & Mine. The weed management plan(s) will include a list of <br />control methods to be implemented, a schedule for implementation of the control methods, and a <br />monitoring program for evaluating the success of control methods used. Western Aggregates, <br />[nc. will make a reasonable attempt to implement control measures. such as chemical or <br />mechanical control, at each permitted site during the 1998 field season to facilitate the control of <br />diffuse knapweed and any other noxious weeds present. Western Aggregate, Inc. will submit a <br />description of weed control methods that were applied at each permitted site during the 1998 <br />field season in the Annual Report(s) for 1998. <br />