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URS Operating Services,In — ARR fur ESVCIima�� <br /> START.EPA Region Vill + <br /> Revision: 01 <br /> Contract No.68-W5-0031 Dates 04/1998 <br /> Pa:e 8 of 37 <br /> 6.0 SURFACE WATER AND SEDIMENT PATHWAY <br /> 6.1 SURFACE WATER AND SEDIMENT SAMPLE LOCATIONS <br /> BACKGROUND: <br /> Surface water and sediment samples for establishing upgradient values for the Tenmile mining <br /> district were collected from Kokomo Creek(CMCX-SW/SE-B 1),Searle Creek(CMCX-SW/SE-B2), <br /> Tucker Creek(CMCX-SW/SE-B3),Clinton Creek(CMCX-SW/SE-B4), Mayflower Creek(CMCX- <br /> SW/SE-B5), and Humbug Creek(CMCX-SW/SE-B6) (Figures 1 - 4) (Tables 3, 4, and 5). The <br /> highest value for each element in. samples from all upgradient sample locations was used for <br /> establishing a site-wide upgradient value for comparison to the Tenmile mining district. <br /> Upgradient surface water and sediment samples were collected from the east interceptor canal <br /> (CMCX-SW/SE-EI) and the west interceptor canal (CMCX-SW/SE-WI) (Figures I through 4) <br /> (Tables 3,4,and 5). The values for these two upgradient sample locations were combined with the <br /> values for the upgradient sample locations for the Tenmile mining district. The highest value for <br /> each element of all upgradient sample locations(Tenmile mining district and Climax Mine proper) <br /> was used for establishing a site-wide upgradient value for comparison to the Climax Mine proper. <br /> DOWNSTREAM: <br /> Target samples along Tenmile Creek were collected downstream of the CM outfall(CMCX-SNV/SE- <br /> T1),and at every one-mile increment(i.e., 1.1,2.1,3.1,4.1...)for approximately 12.1 downstream <br /> miles where Tenmile Creek flows into Dillon Reservoir(Figures 1 -4). Refer to Table 2 for sample <br /> locations and rationale. <br /> 6.2 SURFACE WATER AND SEDIMENT ANALYTICAL RESULTS <br /> The surface water and sediment sample analytical results are reported in Tables 3 through 12. <br /> Laboratory data and validation comments may be found in Appendix C, under separate cover. <br /> 75-51119.00 <br /> F:\START\CLIMAX\Final.ARR\CLIMAX.TX7.«pd:bas <br />