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GENERAL34630
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GENERAL34630
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Last modified
8/24/2016 7:56:00 PM
Creation date
11/23/2007 7:59:59 AM
Metadata
Fields
Template:
DRMS Permit Index
Permit No
C1981025
IBM Index Class Name
General Documents
Doc Date
7/28/2003
Doc Name
Proposed Decision & Findings of Compliance For RN4
Permit Index Doc Type
Findings
Media Type
D
Archive
No
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Boron (B) <br />The Numeric Standard for boron is 0.75 mg/1. There was baseline, but there has been no <br />continuous or recent monitoring, for boron. There has been no monitoring of Outfall 001 <br />discharges for Boron. Boron was detected in baseline upstream, downstream, and Mine <br />No. 1 inflows, all at concentrations below the Numeric Standazd. Thus boron Numeric <br />Standazds aze likely not exceeded in North Thompson Creek. <br />Chloride (Cl) <br />Monitoring results suggest that the Numeric Standazd for chloride is not exceeded in <br />downstream flows. The Numeric Standazd for chloride (Cl) is 250 mg/1. On September 8, <br />2002, chloride concentrations rose from an upstream value of 12.04 mgll to a downstream <br />value 22.4 mg/1. The Outfal1001 discharge with a chloride concentration of 60.2 mg/I <br />may have contributed to this rise. <br />Sulfate (SOa) <br />Monitoring results suggest that Outfal1001 dischazges may have an effect on <br />concentrations of sulfate in North Thompson Creek, but that downstream sulfate <br />concentrations are below the Numeric Standazd. The Numeric Standazd for sulfate (SOa) <br />is 250 mg/I.On September 8, 2002, the concentration of sulfate in North Thompson <br />Creek rose from 30.14 mg/1 above the mine to 44.5 below the mine. These concentrations <br />aze typical of fall analyses for the last five yeazs, and may indicate an effect on North <br />Thompson Creek from Outfa11001 and other inflows. The concentration of sulfate in <br />Outfa11001 has been consistently high. September 8, 2002 untreated Mine 1 dischazge <br />had a sulfate concentration of 288.4 mg/1, untreated Mine 3 dischazge a concentration of <br />198.8 mg/l, and Outfa11001 a sulfate concentration of 234.8 mg/1. <br />Metals <br />Arsenic (As) <br />There has been no continuous or recent monitoring for azsenic at the downstream <br />monitoring location on North Thompson Creek, thus there is no duect information to <br />determine the relationship of downstream concentrations of azsenic with the Numeric <br />Standazd. However, baseline monitoring suggests that downstream azsenic is below the <br />Numeric Standard. The Numeric Standard for azsenic (As) is 50 ug/1(acute, total <br />recoverable). Arsenic was undetected in baseline upstream, downstream, and Mine No. <br />and Mine No. 3 inflow samples. <br />25 <br />
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