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to manage surface water events. No control systems will be necessary at Clear Creek because of the magnitude <br />of distances involved to the disposal site. <br />3.2.7 As-built construction documentation <br />Prior to discharging waste into the disposal facility, a report detailing the facility has been constructed in <br />accordance with the approved plan will be signed by a registered Colorado professional engineer. This report <br />will be submitted to the CDPHE and the governing local jurisdiction. <br />3.3.3 Quality assurance and quality control plan <br />A quality assurance and control plan will be instituted on-site to monitor the construction and maintenance of <br />all engineered structures. <br />3.3.4 Cover material requirements <br />After closure final grading, the impoundment area will be covered with 6" of municipal bio-solids. This will be <br />disked-in to augment the deposited solids for the establishment of soil capable of supporting re-vegetation. A <br />highland pasture grass seed suitable for mountain altitudes will be sowed together with fertilization and <br />irrigation until permanent vegetation is re-established. <br />3.3.5 Soil balance calculations <br />There are minimum naturally occurring topsoils in this area. Cover soils will be constructed as detailed in 3.3.4 <br />Cover material requirements. <br />3.3.6 Water availability <br />Water for the operations is obtained from the municipal water supply of the City of Idaho Springs. It is <br />delivered to the site by a 2" line by pumping and stored in a 50,000 gallon tank and/or open reservoir for use in <br />operations. Additionally, all process water is reclaimed by the means of a pontoon mounted pump from the <br />impoundment. Water consumed by the operation consists of losses due to evaporation and interstitial water in <br />• the porous spaces between the grains of waste (which is impossible to remove due to capillary pressure). Water <br />consumption is estimated at 6,700 gallons per day by evaporation and capillary losses. Additional water of 100- <br />200 gallons per day may be used for dust control on company owned roads. The tap from Idaho Springs is <br />capable of producing approximately 57,600 gallons per day and is adequate for all anticipated needs. <br />3.3.7 Leachate and landfill gas condensate management <br />There are no gas condensates produced by or within this proposed waste stream. The leachate will be managed <br />as described above in 3.2.5.D Leachate collection and removal systems. <br />2.4, 3.4 Recordkeeping <br />Records of the volumes of process materials and the resulting waste stream will maintained at the mill office; as <br />will a copy of the Operational Plan, Construction As-Build Drawings, and any monitoring well data. The daily <br />pH monitoring data logs will also be maintained for audit as the waste stream heavy metals content is in direct <br />correlation with the alkalinity of the process water. <br />2.2 Ground water monitoring plan <br />The EPA is actively monitoring the ground water discharge from the Big Five Tunnel. This tunnel is located <br />approximately 1,100 feet below the proposed disposal facility. The Operator will collect and store this data <br />quarterly. Additionally, the down gradient monitoring well will be checked quarterly, for a minimum of eight <br />quarters, and if ground water is encountered, analyzed for RCRA metals by a certified laboratory. <br />2.3 Explosive gas monitoring <br />There are no explosive gases generated by or within the waste stream. <br />2.5, 3.5 Closure Plan <br />As a part of normal operations, permanent control measures will be installed in 10 feet phased increments <br />(elevation height of one quarter of a terrace) which is estimated to occur every several months. This consists of <br />covering the impoundment area with a 6" blend of municipal bio-solids and wood chips. A geo-textile or jute <br />netting will then be applied to prevent water and wind erosion. This application will augment the deposited <br />21