Laserfiche WebLink
Iron (total recoverable) (Fe, trec) <br />Monitoring results suggest that downstream concentrations of total recoverable iron are <br />below the Numeric Standazd, and that Outfa11001 dischazges aze not worsening the <br />quality (total iron) of water in North Thompson Creek. The Numeric Standazd for iron, <br />total recoverable, is 1000 ug/I (chronic). <br />Lead (Pb) <br />There has been no monitoring for lead at the downstream monitoring location on North <br />Thompson Creek, thus there is no direct information to determine the current relationship <br />of downstream concentrations of lead with the Numeric Standazd. However, monitoring <br />information suggests that there is potential for a rise in lead concentrations between <br />upstream and downstream sampling locations, but that any such rise may not be as a <br />result of Outfa11001 dischazges. The Numeric Standazd for lead (Pb) (chronic) is 4.6 ug/1. <br />Lead was detected at 2 ug/1 in upstream baseline sampling of August 1981. <br />Concentrations of up to 17 ug/1 of lead were detected in baseline September 1978 Mine <br />No. 1 inflow samples, up to 68 ug/I in baseline Mine 3 inflows. However, lead was <br />undetected in an Outfa11001 sample of July 17, 2001. Lead was detected in a September <br />1978 baseline Spring 1 sample at a concentration of 22 ug/1, in a baseline Spring 2 sample <br />at a concentration of 18 ug/1, and a baseline Mine No. 2 mine water sample at 26 ug/1. <br />Manganese (Mn) <br />Monitoring results suggest that downstream manganese concentrations are below the <br />Numeric Standazd, but that Outfall 001 discharges aze higher in manganese than upstream <br />and downstream concentrations. The Numeric Standazd for manganese is 50 ug/1.On <br />September 8, 2002, manganese concentrations were at 20 ug/1 at both upstream and <br />downstream monitoring points. Untreated Mine 1 dischazge of September 8, 2002 had a <br />manganese concentration of 60 ug/I. Untreated Mine 3 dischazge had a manganese <br />concentration of 30 ug/1. The concentration of manganese in the Outfall No. 1 discharge <br />was 50 ug/1. The average baseline concentration of manganese in Spring 1 was 429 ug/1. <br />The average baseline concentration of manganese in Spring 2 was 565 ug/1. <br />Mercury (llg} <br />There has been no continuous or recent monitoring for mercury at the downstream <br />monitoring location on North Thompson Creek, thus there is no duect information to <br />determine the relationship of current downstream concentrations of mercury with the <br />Numeric Standazd. Mercury was undetected in an Outfa11001 sample of July 17, 2001. <br />The Numeric Standazd for mercury is 0.01 ug/1. Mercury was detected at less than 0.1 <br />ug/1 in baseline upstream and downstream measurements. <br />27 <br />