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111 IIIIIIIIIIIII III <br />999 <br />PICKETWIRE PROCESSING, LLC <br />1311 BENTWOOD DRIVE <br />EVANSVILLE, INDIANA 47711 <br />August 5, 1999 <br />Ms. Carla Lenkey <br />Compliance Assurance/Enforcement Program <br />Water Quality Protection Section <br />Water Quality Control Division <br />4300 Cheny Creek Drive South <br />Denver, CO 80246-1530 <br />aE~E~vE~ <br />pCS 21 1999 <br />DNision of M,ne,als 8 Geology <br />RE: NPDES Discharge Monitoring Reports for Third Quarter 1999 <br />Dear Ms. Lenkey: <br />Attached are the NPDES Discharge Monitoring Reports for Third Quarter 1999 at the New Elk <br />Mine (Permit 000000906). During the quarter, discharge was recorded on four events from <br />sediment pond 007 as a result of precipitation received at the mine site (indicated by an *). <br />Precipitation recorded at the New Elk Mine rain gauge is as follows: <br />3 0 ~u~ July 5 0.8" July 20 1.3" July 25 0.5" <br />~~ / i~ <br />July 28 <br />Aug 3 <br />_0.4" Aug 1 <br />0.2" ~g 4~ <br />0.4" <br />0.8" <br />Aug 2 <br />10' <br />0.3" <br />0.7" <br /> <br />~~ ~"~ Au l5 _ <br />Set 15* Q_6" _ _ _ Aue Z l <br />0.6" Sept 16 0.4" <br />0.5" ~uQ 22* <br />Sept 20 0 7" <br />0.2" <br /> Sept 21 0.3" <br />With these precipitation events, Picketwire requests that the standards of TSS and Total Iron be <br />waived as al lowed in our permit. With this request, no exceedances ofthe remaining standards were <br />recorded. The design of this sedimentation pond includes a stand pipe with weep holes and a gate <br />valve on the discharge pipe. The valve is operated in the open position to allow storm water to pass <br />through the pond after settlement of solids occurs. The design parameters and stage-storage curve <br />for Pond 007 have been submitted previously for your information. The pond is designed to contain <br />the 10-year, 24-hour precipitation event of 2.9 inches. Prior to each discharge, the pond had <br />dewatered to at least the bottom of the weep holes. J„ly S • 8 <br /> ro •7 ~ <br />20 /.3 <br />_ <br />/5 <br />.b <br />25 •> <br />~! z I ,~f <br />zy • <br />µ z z •~ -3f- <br />2 • 3 I S . (o -1E <br /> <br />y ,z <br />q ~ <br />IL <br />.5 <br /> yo .z <br /> ~~ ,~ <br />