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Dames & Moore, 1999 - USDA Forest Service

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TABLE 5.1-1<br />

PRELIMINARY CHEMICAL SPECIFIC ARARS (APPLICABLE AND REGULATORY)<br />

HOLDEN MINE RllFS<br />

DAMES 6 MOORE JOB NO. 17693005419<br />

Parameters<br />

m<br />

' PCBs - Polychlorinated Biphenyls as total (seven arochlon)<br />

"Individual Arochlon<br />

NE - Nol Established<br />

NA - Nol Available<br />

1 - Area Background values based on Statistical Analysis per MTCA using data wlleded fmm Railroad Creek drainage in 1998.<br />

2 . Yakima Basin 901h Percentile Values. Washington Department of Emlogy "Nalural Background Soil Metals Concentrations in Washington Slate'. Oclober 1994<br />

3 - Model Toxics Contml Acl (MTCA) Melhod A. Toxic?, Cleanup Program. amended 1196 (Chapter 173-340 WAC)<br />

4 - Model Torics Conbcl Acl Cleanup Levels and Risk Calculation (CLARCII). 2/96. Method B<br />

5 - Area background values based on Statistical Analysis per MTCA using data wlleded fmm lhe Railroad Creek and Stehekin walersheds. historically and during lhe RI.<br />

Values for dissolved chromium. selenium. silver, and lhallium and total selenium and lhallium are provided as < values as these metals were not detected above this level. The value for total uranium is based on the maximum concenbation.<br />

6 - Based on Torics Criteria for Those Slates Not Complying with Clean Walw Acl Sedion 303(c)(2)(B). at 40 CFR Par( 131.36 (b)(l)<br />

Cadmium. chromjum. copper. lead. nickel, silver (acute only), and zinc are hardness coneded for dual hardness values per sample. For purposes of lhis lable. the values are based on a 25 ppm hardness value.<br />

7 - MCLs (Maximum Contaminant Levels). Drinking Waler Regulations and Heallh Advisories. Ofice of Wer. US EPA. 10196<br />

8 - Sewndary MCLs (Marimurn Contaminant Levels). Drinking Water Regulations and Heallh Advisories. Ofice ct Water. US EPA. 10196<br />

9 - Reference wncentations based on Statistical Analysis per MTCA using data collected from lhe Steheki area during 1998.<br />

10 - Value shown is maximum concenlralion as h e 901h percentile was not calculable.<br />

1 I - Washington Department cf Ewlogy. 1997 Creation and Analysis of Freshwater Sedimenl Ouality Values in Washington State: Freshwater Sediment Quality Value based on ShlS values.<br />

12 - Long el al. (1995Iwilh the exceptions of iron and manganese khich are from P e~ud<br />

el al. (1993)<br />

13 - Values are referenced in WAC 173201A as par1 of lhe EPA'Quality Criteria for Water 1986' publication EPA 44015S001. May 1.1986.<br />

ER-M Effeds ratio- median (OCcasionally causes adverse effeds).<br />

ER-M Effeds ratio- low (rareIy causes adverse effects).<br />

TABLE 5.1-1<br />

PRELIMINARY CHEMICAL SPECIFIC ARARS<br />

(APPLICABLE AND REGULATORY)<br />

40.W 20.000

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