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Immediately upon notification of the discharge, a TCC surface crew was dispatched to the pond to seal the riser <br />by wrapping it with brattice cloth to stop further discharge of coal fines to Foidel Creek. Simultaneously, <br />Environmental Staff proceeded downstream on Foidel Creek to determine the downstream extent of migration of <br />coal fines with normal low-flows in the stream, placing anchored booms at six downsveam locations in the <br />sveam to filter and capture coal fines to prevent their further migration. Significant coal fines deposition <br />occurred in the first 2,000 Peet of the stream from the discharge point. Suspended coal fines (black water) were <br />carried downstream approximately 2.8 miles by normal sveamflows to a marshy area (appears to be a subsided <br />area) in the vicinity of a road crossing of the rail-line behind the original Ashley Ranch house. There was no <br />Further evidence of coal fines migration beyond this point (based on visual Wrbidity observations). Further, there <br />were no significant water quality impacts noted downsveam beyond this marshy area. <br />Water samples were obtained at both the discharge of Sedimentation Pond E (prior to sealing the riser) and just <br />downstream of the limit of the visible coal fines migration. The downstream sample was cleat After setting for <br />24-hours, the coal fines had settled out of the "worst-case" discharge sample from Pond E, resulting in a slightly <br />turbid decant water in the upper portion of the sample bottle. The initial samples were sent-out yesterday for <br />water quality analysis. The Environmental Staff conducted regular monitoring/sampling of [he minor flow at the <br />Pond E discharge and at several downstream points on Foidel Creek. Analytical data was provided to CDRMS. <br />In compliance with applicable reporting requirements of both our CDPS discharge permit and our Mining and <br />Reclamation Permit, the unanticipated discharge was been reported to the CHPHE-WQCD and CDRMS within <br />24 hours of the detection of the discharge. TCC also made initial contact with USACE re: emergency permitting <br />of clean-up activities in the sveam channel, and with the Colorado Division of Wildlife re: potential aquatic <br />habitat concerns. It was confirmed that the only material discharged was water, coal fines, and a flocculant. <br />Review of the MSDS sheet for the flocculant and a subsequent conversation with, and a-mail from the floc <br />manufacturer have confirmed that Che flocculant is non-hazardous, non-toxic, and does not have adverse effects <br />on aquatic life. This information has been forwarded to the responsible agencies. <br />Subsequent remediation steps included: 1) Isolation, dewatering, and clean-out of the coal fines in Pond E; 2) <br />Reestablishment of runoff treatment capacity for Pond E. Surface crews placed a trash pump near the outlet of <br />Pond E and pumped decant water from the contained slung back to the thickener. A longitudinal earthen berm <br />was then established in Pond E to accomplish Steps 1 and 2. CDRMS granted field approval to construct the <br />berm as a "pond maintenance" activity. The coal fines were isolated, and allowed to continue to dry-out, with <br />pumping of decant water from the surface. The partially dewatered coal fines were allowed to freeze and then to <br />removed them for disposal on the coal refuse pile. This work was completed in January 2007. <br />3) Clean-up of coal fines deposited in the proximate portion of Foidel Creek. Environmental Staff constructed a <br />high pressure hose system with a 300 gallon tank. A small vacuum tanker truck was hired to remove coal fine <br />material and dispose of it in a section of the refuse pile. The Pond E discharge channel was cleaned using the <br />high pressure water system. Coal fines were washed off the banks of Foidel Creek and eventually driven into <br />small basin areas, where the vacuum track and TCC Environmental personnel could remove the fines. Clogged <br />culverts were cleaned using the vacuum hose in conjunction with the high pressure water system. Final cleanup <br />was completed by mid-October 2006. <br />For additional detail, please refer to abatement communications for NOV CV-2006-006 <br />3.8 2006 Inflow Survey <br />The annual inflow survey was performed during November. During the 2006 inflow study, flow rates and Held <br />parameters were recorded for measurable inflows from the accessible areas of the underground mine. Results of <br />the 2006 survey are presented on Figure 117, 2006 Inflow Study Mined Area (in map pouch at back of report). <br />13 <br />