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Management Plnn for Test Area Construction Activities is enclosed. More <br />information on the specific BMPs will be provided later. <br />66. Describe the wastewater discharges from the test mine site and furure discharges. Provide <br />a copy of the CDPHE permit and Discharge Monitoring Reports. Was monitoring required? [f <br />so, were the permit limits met? <br />Please note that there will be no wastewater discharge in the commercial phase. The <br />reference to potential future discharges in the Mine Plan was unclear but meant to <br />address continuing discharges under test phase operations which may overlap in <br />time with commercial construction. <br />There are currently ten surface water discharge outfalls permitted under a CDPS <br />permit. Nine of the outfalls are associated with well drilling for discharge of drilling <br />water. These outfalls are rarely used because drilling water is usually contained in a <br />pit and is not discharged to the surface. One outfnll is associated with the <br />Experimental Test Mine facility. It was used early in the test phase to discharge <br />water from the ponds when the liner was first being tested. This outfall is currently <br />used far a low flow discharge from the boiler feedwater system. Quarterly Discharge <br />Monitoring Reports are submitted to CDPHE and EPA. Although there have been <br />occasional sampling problems, permit levels have been met over the nearly 2 years <br />of surface water discharge monitoring. <br />Wastewater discharges during commercial operations will be routed to on-site <br />evaporation ponds. <br />Meteorology and Air Quality <br />67. modeling protocols/procedures/program descriptions for both sites modeled (Piceance and <br />Pazachute) <br />By letter dated March 17, 1998, Steigers Corporation submitted to Mr. Chuck <br />Machovec of the Air Pollution Control Division (APCD) of CDPHE a document <br />demonstrating the representativeness of the meteorological data collected in 1984 at <br />Occidental Oi[ Shale Tract Cb for application to the Piceance Site commercial mine <br />facilih~ (copy enclosed). By rnerno dated April 1, 1998, APCD approved use of the <br />proposed meteorological data for dispersion modeling purposes and the use of <br />mixing height date from Grand Junction, Colorado. APCD nlso approved the use of <br />Cb site sigma-theta measurements to determine Pasquill-Gifford stability classes <br />(copy enclosed). These npproved meteorological data nre currently being used in <br />modeling analyses for tl:e Picearsce Site cornrnercinl facility. <br />On-site nir gstnlih~ and meteorological data were collected !nj Unocal during 1989. <br />Tl:is or:-site meteorological data set has been discussed with APCD and received <br />28 <br />