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Weiland Inc. <br /> J Line 7, 2019 <br /> Page 5 of 7 <br /> (4) You must indicate the projected amount from each of the sources of water to supply the project water <br /> requirements for the mining operation and reclamation. <br /> (5) You must affirmatively state that the Operator/Applicant has acquired(or has applied for) a National Pollutant <br /> Discharge Elimination System(NPDES)permit from the Water Quality Control Division at the Colorado <br /> Department of Health, if necessary. <br /> The permittee will need to acknowledge the following: <br /> DRMS will require a minimum of 5 quarters of groundwater level monitoring data (preferably collected monthly <br /> from wells identified as OW-1 through OW-9 and EW-1, 2 and 3 on the reclamation map) to establish <br /> "background"water levels in the vicinity prior to the commencement of dewatering at the site. DRMS will also <br /> require well construction information for all monitoring wells. <br /> The permittee will also need to commit to monthly monitoring of these locations daring ruining operations, not <br /> just prior to mining and following reclamation as specified in the application. <br /> Pre-mining water levels (minimum of 5 quarters)should be evaluated to determine the most appropriate well <br /> specific "trigger levels"for any proposed mitigation activity (increased monitoring, modification to pumping, <br /> French drains, etc.). When sufficient data has been collected to establish defensible well specific "trigger <br /> levels", the trigger level data and possible mitigation options for exceedances shall be submitted by the permittee <br /> to DRMS in the form of a Technical Revision for approval. Please farther define "30%of historic"as used in <br /> Exhibit G as provided. <br /> Anv permanent groundwater level mitigation measures(such as French drains, etc.) will require submittal of a <br /> Technical Revision to the permit which will include the design specifications for DRMS approval prior to <br /> installation. <br /> A groundwater samplingplan will need to be submitted by the permittee to collect pre-mining water quality data <br /> (constituents from Tables I through 4 of"The Basic Standards for Ground Water')from several monitoring <br /> locations. This data will be used to establish "background"concentrations which may be needed in the fixture to <br /> demonstrate that the site is in compliance with Water Quality Control Commission 5 C.C.R. 1002-41, Regulation <br /> No. 41 - The Basic Standards for Groundwater. It will be especially useful to document the pre-mining conditions <br /> if"naturally occurring"concentrations of any Table 1-4 analytes are elevated above table value standards. This <br /> sampling plan may be inchxded in the application, or as a subsequent Technical Revision,for DRMS review and <br /> approval. <br /> EXHIBIT L -Reclamation Costs (Rule 6.4.12): All information necessary to calculate the costs of reclamation <br /> must be submitted and broken down into the various major phases of reclamation. You must provide sufficient <br /> information to calculate the cost of reclamation that would be incurred by the state. <br /> As previously stated, costs for removal of the low water crossing as well as installation of armored inlet/oaxtlet <br /> flood control structures will need to be included in the provided estimate. The reclamation cost estimate will be <br /> reviewed by DRMS when all other adequacy issues have been addressed. <br />