Laserfiche WebLink
Cadmium (Cd). A total of 10 Southfield samples were analyzed for cadmium. <br />The average value of these samples was -0.1 ppm -with no high or low <br />values. The suspect level for cadmium in the Montana guidelines is 1.0 <br />ppm. Due to these low values, no problems with toxicity or groundwater <br />quality are anticipated. <br />Chloride lCl). A total of 10 Southfield samples were analyzed for <br />chloride. The average value of these samples was 8 ppm with a range of <br />6 ppm in a Jack O'Lantern roof sample, (SR-50), and a Red Arrow floor <br />sample, (SR-50), to 15 ppm in a Red Arrow roof sample, (SR-50). These low <br />concentrations are not expected to result in revegetation toxicity or <br />adversely impact groundwater quality. <br />Coaoer (Cul. A total of 10 Southfield samples were analyzed for copper. <br />The average value of these samples was 2.1 ppm with a low of 0.4 ppm in <br />a Red Arrow roof sample, (SR-46), and a high of 4.8 ppm in a Jack <br />O'Lantern roof sample, (SR-46). The upper limit for ,copper toxicity as <br />addressed by the Montana regulations, is considered to be 40 ppm. No <br />problems with toxicity or groundwater quality are anticipated. <br />Fluoride (-F1. A total of 10 Southfield samples were analyzed for <br />fluoride. The average value of these samples was 5 ppm with a low of 2 <br />ppm in a Red Arrow roof sample, (SF-50), and a high of 10 ppm in a Jack <br />O'Lantern floor sample, (SF-49). No limits for fluoride have been <br />established. However, due to the relatively low values, no problems with <br />revegetation toxicity or groundwater quality are anticipated. <br />Iron Fe A total of 10 Southfield samples were analyzed for iron. The <br />average value of these samples was 69 ppm with a low of 29 ppm in a Jack <br />O'Lantern floor sample, (SR-49), and a high of 92 ppm in a Jack O'lantern <br />roof sample, (SR-50). Due to the alkaline nature of both the strata and <br />groundwater, no significant dissolution of the iron is expected. While <br />no specific suitability guidelines for iron exist, no problems with <br />revegetation toxicity or groundwater quality are anticipated. <br />