Dames & Moore, 1999 - USDA Forest Service

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TABLE 7.2.4-8a HAZARD QUOTIENTS FOR MULE DEER HOLDEN MINE RllFS DAMES 8 MOORE JOB NO. 17693005619 UCL Total Dose (mglkglday) . TRV HQ Metal Surface Subsurface TP-1 TP-2 TP-3 Dust Lagoon' M. Yard' (mglkglday) Surface Subsurface TP-1 TP-2 TP-3 Dust Lagoon' M. Yard' Cadm~um 0014 0.055 0.014 0.015 0.012 0.012 0.245 0.078 5.84 0.002 0.003 0.002 0.002 0.042 0.013 0.042 0.013 Copper 0.550 3.272 0.635 0.532 0.522 0.555 4.01 1 1.472 8.58 0.074 0.062 0.061 0.065 0.467 0.1 72 0.467 0.172 Lead 0.200 0.281 0.352 0.259 0.243 0.201 1.478 2.372 7.44- 0.047 0.035 0.033 0.027 0.199 0.319 0.199 0.319 Zinc 4.430 2.611 1.598 1.310 1.235 1.136 40.021 12.686 57.29 0.028 0.023 0.022 0.020 0.699 0.221 0.699 0.221 ' = Maximum Dose H:\Holden\DraR final n rpnS-Aeco ra\tablesU.(0599R (Deer) 7/28/99
TABLE 7.2.4-9 HAZARD QUOTIENTS FOR DEER MICE HOLDEN MINE RllFS DAMES 8 MOORE JOB NO. 17693405419 Metal Surface Cadmium 0.08 Copper 3.17 Lead 1.15 Zinc 26.14 ' = Maximum Dose Subsurface 0.32 18.85 1.62 22.10 TP-1 0.08 3.66 2.03 9.80 UCL Total Dose (mglkglday) TP-2 0.09 3.06 1.49 8.19 TP-3 0.07 3.01 1.40 9.01 Dust 0.07 3.20 1.16 7.84 Lagoon' 1.38 22.65 8.35 285.74 M. Yard' 0.44 8.31 13.39 79.79 TRV (mglkglday) 10.1 170.8 16.2 323.3 Surface 0.01 0.02 0.07 0.08 Subsurface 0.03 0.1 1 0.10 0.07 TP-1 0.01 0.02 0.13 0.03 TP-2 0.01 0.02 0.09 0.03 HQ TP-3 0.01 0.02 0.09 0.03 Dust 0.01 0.02 0.07 0.02 Lagoon' 0.14 0.13 0.52 0.88 M. Yard* 0.04 0.05 0.83 0.25
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I DAMES & MOORE A DAMES & MOORE GRO
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DAMES & MOORE .. A DAMES 8 MOORE GR
Page 6 and 7:
INTRODUCTION The olden Mine was ope
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The Forest Service implemented site
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Remainder of Year - After the sprin
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' Water Portal Drainage quality mea
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Groundwater discharge from the tail
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Trout An intermediate potential ris
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Windblown Tailings Material The ero
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Lucerne Bar Sampling Additional sed
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3.0 REMEDIAL INVESTIGATION METHODOL
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... 5.3 SURFACE WATER .............
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8.3.3 Surface Water ...............
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Table 4.6-3A - Table. 4.6-4 - Table
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Table 7.1-1 - Table 7.1-5 - Table 7
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Table 7.2.4-2D - Table 7.2.4-3 - Ta
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Figure 4.2-2 - Figure 4.2-3 - Figur
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Figure 5.3-9 - Figure 5.3-10 - Figu
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Figure 6.5-9 - Figure 6.5-10 - Figu
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ACRONYM AND ABBREVIATION GLOSSARY @
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1.0 INTRODUCTION The .Holden Mine i
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sediment reference location" includ
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Volumes 11,111. and IV Section 4.0
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. . . . .................. ........
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2.1 SITE DESCRIPTION The Holden Min
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~:\wpdaca\005\rc~o~iol&n-2~i~-0.dae
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2.5 SUMMARY OF ISSUES OF POTENTIAL
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G:\tupdata\005\repomUloldm-t\riU-O.
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1986 1988 1988 1989 Science Applica
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piemmeter water samples as Service.
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G:\~at~\00SLeporuUIoIden-2~V4.d0~ 1
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SOURCE: Wtem et al., 1992 USGS Chda
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3.0 REMEDIAL INVESTIGATION METHODOL
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wilderness boundary with the intent
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The test pits were excavated utiliz
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were transferred to AutoCAD maps of
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3.2.1 Streamflow Suweys Streamflow
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Site. Samples collected for dissolv
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' chromium, copper, iron, lead, mag
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elevated metals based on field scre
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Wolman pebble counts), occurrence a
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Assessment by Mining Consultant The
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discussions of the 1992 data have n
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VelocityDepth - influences benthic
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To the extent practical, electrosho
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Proportion of individuals as top ca
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provide adequate data to cany forwa
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3.1 1 TASK 11 - DATA EVALUATION 3.1
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3.11.4.2 Two-Dimensional Groundwate
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TABLE 3.0-1 KEY OF SITE FEATURES 8
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TABLE 3.2-1 ANALYTICAL PROGRAM FOR
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TABLE 3.2.2 ANALYnCAL PROORAM FOR G
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TABLE 1.24 ANALYTICAL PROGRAM FOR G
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TABLE 3.24 ANALmCAL PROORAM FOR GRO
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SOURCE: USGS Topographic Map, State
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- Figure 3.0-3 DAMES & MOORE HOLDEN
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Figure 3.1-2 DAMES & MOORE ! RI SOI
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Fill (2) Vent (1) SOURCE: Base map
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SOURCE: Base map information from U
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SOURCE: WIteffi et a/., 1992 USGS C
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DAMES & MOORE Figure 3.4-2 FLOCCULE
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i I i .4 i ,i i i\ i '.\ i \ \ i I
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4.1.2 Site Surface Features Referri
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Hydroelectric Plant Electrical powe
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Water seepage emanates, in the spri
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'7 ~t the Site, approximately mid-w
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system delineated by ditches and re
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Section I-I' and shows the six tunn
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The uppermost stopes within the min
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make up the earth's surface. The st
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silver, and included 34,000 tons of
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strength was determined by Hart Cro
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gravels are variable in thickness a
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wetlands and adjacent to Railroad C
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Several faults have been mapped in
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the coefficient of Friction. Geomor
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The groundwater levels used for the
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Tailings pile 3 is situated near th
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vertical extent of the underground
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from the roof, then evaluating the
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4.2.8 Potential Borrow Source Areas
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for good quality riprap would neces
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May and June, which coincide with t
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Rating Calculations Referring to Ta
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with little or no braiding. Upstrea
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Discharge in Railroad Creek was mon
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model predicted a 100-year flood at
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The data logger, or transducer, was
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submerged at high water levels. Flo
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this, it is possible that the snow
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4.3.5 Basin Average Climatic Water
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surface erosional features provide
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* The D50 equation is obtained from
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effect of a 0.05-foot stage increas
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discussed in' Section 6.8.2 of this
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Observations During Aquatic snorkel
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covers limited portions of the Site
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Bedrock Bedrock underlies the entir
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high as 0.1 to 0.2 feet per foot (F
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Generalized Site-Wide Groundwater R
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4.4.3.5 Groundwater Uses Groundwate
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Reach 1 Since there are no observed
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evaluated on the basis of judgment
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and only started flowing afier seve
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interceptor ditches likely carry pr
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The inflow of groundwater in the fo
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Accuracy The accuracy of the bedroc
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aquifer from the portal drainage, o
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Reference Reaches RC-10. Railroad C
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accessed, including the RM-3 "Dan's
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The banks are relatively nonvegetat
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Ratio of Shredder Functional Feedin
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without scrapers and organisms requ
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present at RC-6, RC-I, RC-3, SFAC-I
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and stumps with bark piles surround
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Tailings Piles A flock of violet-gr
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4.6.3 Threatened or Endangered Spec
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Background Information Grizzly bear
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anadromous populations occurring in
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Creek drainage, they are more commo
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R16E S7). These species include an
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Page 255 and 256:
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TABLE 4.1 -1 KEY OF SITE FEATURES 8
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Pitchblende Sericite Biotite Source
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TABLE 4.2-2a EROSION POTENTIAL RANK
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TABLE 4.2-4 RIP-RAP CONDITION RANKI
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TABLE 4.24 BORROW SOURCE EVALUATION
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TABLE 4.3-1 AVERAGE MONTHLY FLOW PE
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TABLE 4.33 AVERAGE MONTHLY POTENTIA
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TABLE 4.3& SURFACE WATER FIELD PARA
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TABLE 4.3da SURFACE WATER flELD PAR
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TABLE 4.3-5 MONTHLY STREAMFLOW AVER
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NA = not measured NF = no flow S =
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TABLE 4.34b AVERAGE MONTHLY WATER B
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Station RC- I RC-4 RC-9 Copper Cree
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Hydrostratigraphic Unit SoilIFill C
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TABLE 4.4-2 GROUNDWATER FIELD PARAM
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Page 289 and 290:
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Stream Reach RC-4 to RC-7 RC-7 to R
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TABLE 4.4-6 RESULTS OF OCTOBER 1998
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Seep SP-8 was observed flowing in l
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TABLE 4.448 SEEPAGE FIELD PARAMETER
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TABLE 4.4- SEEPAGE FIELD PARAMETERS
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TABLE 4.4-9 REACH 1 SITE-SPECIFIC W
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Habitat Variable Stream Velocity an
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a TABLE 4.6-2A BENTHIC MACROINVERTE
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TABLE 4.6-2C DISTRIBUTION FIT FOR M
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TABLE 4.6-3 TROUT POPULATION ESTIMA
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Date September 9 September 10 Septe
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TABLE 4.6-6 . HERPETOFAUNA LIKELY T
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North-aspect Slope Sharp-shinned ha
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! I TABLE 4.6-10 MAMMAL SPECIES OBS
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CLIENT PRI VILECED AND CONFIDENTlA
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TABLE 4.6-13 U.S. FOREST SERVICE SU
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TABLE 4.6-15 SURVEY AND MANAGE SPEC
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. . ; SOURCE: Wen et al., 1992 ,, .
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SOURCE: Base mrlp information from
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____------ ---_ SOURCES: Base map i
Page 331:
Page 334 and 335:
' Railroad Creek SOURCES: Northwest
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- Approximate f' Plan View Outline
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' DAMES LEGEND - Approximate extent
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- LEGEND Approximate extent of unde
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LEGEND ==s Approximate extent of un
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- E 2f W . E Volcanic Arc Cascadia
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,.' \ /- i \\ \ i i \ \..--A j \ /.
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DMES & MOORE Figure 4.2-6a HOLDEN M
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0.7 D.8 D. 9 E.0 E.l E.2 E.3 E.4 E.
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LEGEND Bedrock F WEST SOURCE: North
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G NORTH .- C u C al Alluvial rn Rew
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File: g:/l7693005mA-4st.slp Glacial
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3.24 3.23 X 3.22 w n 3.21 c .W 3.20
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DAMES & MOORE A aAMES & MOORE GROUP
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SOURCE: Base map inADrmatim from US
Page 366 and 367:
Figure 4.2-21 d HOLDEN MINE SUBSIDE
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* r- Job DAMES & MOORE A DAMES 8 MO
Page 370:
SOURCE: Golder and Associates, 1990
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SOURCE: Base nmp inlbnaficxl from U
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SOURCE: Wters et al., 1992 0 2.5 5
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D. 7 0.8 SOURCES: Base map informaf
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SOURCE: Base map inlbrmatim lrom US
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0.00 I I I I I I April May June Jul
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DAMES & MOORE A DAMES 6. MOORE GROU
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1.80 - 1 .. --.- -- 0.9 1.60 - ! Po
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Note: No data available for June 19
Page 392:
: g ; . - . .... . -._. ........ .
Page 395 and 396:
LEGEND ..-.-.-.-.- Freewater surfac
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SOURCE: Base map inlbrmation from U
Page 400:
' D. 7 . 0.8 D. 9 E.0 E. 1 E.2 E.3
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C 0 % iil f 3192 - 3190 - 3188 3186
Page 406:
, -.I p./ ,/' i i .\ i i i -.-. i '
Page 409:
~ob NO. 1769300~019 Infiltration to
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Overland . Flow Areawest of Site Ov
Page 414:
' SOURCE: Base map information from
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D. 9 E.0 E.2 E.3 E.4 0.7 SOURCE: Ba
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...... -.: - - ........... 3790 ,.-
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DRAFT FINAL Remedial Investigation
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(RAOs) section of the Feasibility S
Page 427 and 428:
Also included in WAC 173-201A are p
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MTCA defines the methods and descri
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The historical data for samples col
Page 433 and 434:
groundwater was encountered at appr
Page 435 and 436:
were below MTCA levels with the fol
Page 437 and 438:
sampling rounds, the field filter b
Page 439 and 440:
Department of Ecology samples colle
Page 441 and 442:
data sets where the total value was
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5.3.1.3 Summary Based on the statis
Page 445 and 446:
adjacent to the Site were not neces
Page 447 and 448:
RC-4 is located downstream of the p
Page 449 and 450:
RC-2 is'located immediately downstr
Page 451 and 452:
In May 1997, copper (21.5 pg5) in t
Page 453 and 454:
Data collected from upstream statio
Page 455 and 456:
of water exiting from the portal. S
Page 457 and 458:
5.3.4.3 Historical Portal Drainage
Page 459 and 460:
parameters did not indicate seasona
Page 461 and 462:
The portal drainage was sampled at
Page 463 and 464:
and sodium were not evaluated as th
Page 465 and 466:
preliminary report 1997). Sample lo
Page 467 and 468:
time frame. The concentration of ea
Page 469 and 470:
5.4.2.4 Waste Rock Piies Seep sampl
Page 471 and 472:
Seep data were compared to MTCA gro
Page 473 and 474:
The data for seeps associated with
Page 475 and 476:
in wells TP1- 1A. TPl-2A, TPI-3A, T
Page 477 and 478:
5.4.2.8 Lucerne Well The well at th
Page 479 and 480:
Ninemile Creek) with a correspondin
Page 482 and 483:
During the mine reclamation activit
Page 484 and 485:
TABLE 5.0-1 KM OF SITE FEATURES 8 M
Page 486 and 487:
Page 488 and 489:
Page 490 and 491:
TABLE 5.2-1 SUMMARY OF RI SOlL ANAL
Page 492 and 493:
TABLE 5.2-1 SUMMARY OF Rl SOIL ANAL
Page 494 and 495:
TABLE 5.23 SUMMARY OF HISTORICAL SO
Page 496 and 497:
TABLE 5.24 SUMMARY OF HISTORICAL TA
Page 498 and 499:
TABLE 5.2-5 SUMMARY OF RI TAILINGS
Page 500 and 501:
TABLE 5.2-6 POTENTIAL COMPOUNDS OF
Page 502 and 503:
TABLE 5.51 SURFACE WATER AREA BACKG
Page 504 and 505:
. . .. . . . .....-a .---.-I--u,. C
Page 506 and 507:
TABLE 5.3-2 Aluminum Data Points, B
Page 508 and 509:
TABLE 5.34 Beryllium Data Points. B
Page 510 and 511:
TABLE 5.3-6 Chromium Data Points. B
Page 512 and 513:
TABLE 5.34 lron Data Points. Backgr
Page 514 and 515:
TABLE 5.3-10 Magnesium Data Points,
Page 516 and 517:
TABLE 5.3-12 Selenium Data Points,
Page 518 and 519:
TABLE 5.3-14 Zinc Data Points, Back
Page 520 and 521:
TABLE 5.3-16 Statistical Summary -F
Page 522 and 523:
TABLE 5.3-18 SUMMARY OF RI SURFACE
Page 524 and 525:
h:\holden\drafi final nrpt\SS\TaMes
Page 526 and 527:
TmLE 5.240 STATION RG2 AND P ROXW S
Page 529 and 530:
TABLE 5.3-20 h:\holden\draft final
Page 531:
TPBLE 5.3-21 STATION RCJ AHD PROXBS
Page 534 and 535:
TABLE 5.3-21 SUMMARY OF RI WATER QU
Page 536 and 537:
TABLE 5.3-24 SUMMARY OF SURFACE WAT
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h V~olden\draR final nrpt\S-5\Table
Page 540 and 541:
Page 542 and 543:
Page 544 and 545:
TABLE 5.3-28 SUMMARY OF RI WATER QU
Page 546 and 547:
TABLE 5.529 SUMMARY OF RI WATER QUA
Page 548 and 549:
TABLE 5.3-30 SUMMARY OF RI PORTAL D
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TABLE 5.W1 SUMMPRY OF HISTORICAL WA
Page 552:
TABLE 5.592 SUMMARY OF RI WATER QUA
Page 556 and 557:
TABLE 5.3-35 TABLE 5.355 SUMMARY OF
Page 558 and 559:
TABLE 5.358 SUMMARY OF WATER QUALIT
Page 560 and 561:
n.\holden\draR Rnal r1rpt\S-5\tabIe
Page 562 and 563:
TABLE 5.4-1 SUMMARY OF RI GROUNDWAT
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TABLE 5.4-1 SUMMARY OF Rl GROUNDWAT
Page 566 and 567:
TABLE 5.4-2 SUMMARY OF RI SEEPAGE W
Page 568 and 569:
TABLE 5.4-2 SUMMARY OF R1 SEEPAGE W
Page 570 and 571:
TABLE 5.4-2 SUMHAW OF RI SEEPAGE WA
Page 572 and 573:
TABLE 5.43 HlSTORlCAL SUMMARY OF GR
Page 574 and 575:
TABLE 5.4-4 HISTORICAL SUMMARY OF S
Page 576 and 577:
TABLE 5.44 HISTORICAL SUMMARY OF SE
Page 578 and 579:
TABLE 5.44 HISTORICAL SUMMARY OF MI
Page 580 and 581:
TABLE 5.5-1 SUMWRY Of HISlORlcbl DA
Page 582 and 583:
TABLE 5.5-2 SUMMARY OF FALL 1998 SE
Page 584 and 585:
TABLE 5.61 SUWAARY OF 1997 FERRICRE
Page 586 and 587:
D.7 D.8 SOURCE: Base map informatio
Page 588:
Scale in Feet Irene Lode Figure 5.2
Page 593 and 594:
i i Wilderness i I i I i I P.J i i
Page 595 and 596:
Date -+-- Discharge (cfs) 4'- ~lumi
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DAMES & MOORE A oAW 6 MooRE GROUP C
Page 599 and 600:
-+- pischarge (cfs) I t hardness 1
Page 601 and 602:
-I Job NO. 17693-005-01 9 .----. Ma
Page 603 and 604:
160 -.- May-Zinc --- September-Zinc
Page 606:
SOURCE: Base map infomtim horn USFS
Page 609:
D.8 D. 9 E.0 ..... E.2 E.3 E.4 a D.
Page 613 and 614:
SOURCE. Base map information frwn U
Page 620:
SOURCE: Base map inlomtim frwn USFS
Page 631:
SOURCE: Base map inlbrmatim from US
Page 636 and 637:
Approximate Scale in Feet DAMES & M
Page 638 and 639:
LEGEND -- -A O Ferr~crete, floccule
Page 640 and 641:
Subsection 6.4 presents general Sit
Page 642 and 643:
.LXOdW RI WNId W@Md 11:V:6661 'LZ A
Page 644 and 645:
snowmelt on the adjacent valley slo
Page 646 and 647:
1XCH3d Ill I V N U ~ I l:O!6661 b ~
Page 648 and 649:
63.1.1 Sulfide Mineral Oxidation Th
Page 650 and 651:
a IXOdIM Ill WW UVXCI%M 11:P!6661 '
Page 652 and 653:
Co-precipitation. Sorption. 633.1 D
Page 654 and 655:
Eh Control on Preeipitation/Dissoln
Page 657 and 658:
6.4.1 Evidence of Iron Sulfide Mine
Page 659 and 660:
to the underground mine workings, r
Page 661 and 662:
The pH to copper relationship (Figu
Page 663 and 664:
' 6.5.1 Air and Water Movement Asso
Page 665 and 666:
not originating h m the underground
Page 667 and 668:
sulfate discharged from the portal
Page 669 and 670:
decreases also, aiding in the disso
Page 671 and 672:
West Waste Rock Pie, Mill Building,
Page 673 and 674:
Mixing of Seeps with Railroad Creek
Page 675 and 676:
through diffusion. This is indicate
Page 677 and 678:
MINTEQA2 indicates that the seep wa
Page 679 and 680:
In order to provide comparative flo
Page 681 and 682:
main source of zinc load (82 percen
Page 683 and 684:
source areas was estimated from flo
Page 685 and 686:
Monitoring of seeps from drill hole
Page 687 and 688:
(i.e., portal drainage) for cadmium
Page 689 and 690:
Upstream of the tailings piles, sig
Page 691 and 692:
Source controls reflect the differe
Page 693 and 694:
a. H:\Holden\Draft TABLE 6.0-1 KEY
Page 695 and 696:
Page 697 and 698:
Page 699:
i V'6 SZP C0'0 pea? t-38~0 sfiw i18
Page 702 and 703:
Table 6.64 Loadlng Calculations - A
Page 704 and 705:
Job NO. 17693-005-01 9 Draft Final
Page 707 and 708:
1500 Ventilator Portal (Elev. 3454)
Page 709 and 710:
Job NO. 17693-005-019 - - - - LEGEN
Page 711 and 712:
SOURCE: SRK Oxidant I 2+ H+ SO 2+ +
Page 713:
SOURCE: SRK DWVES & MOORE A oAW 6 M
Page 716:
SOURCE: SRK Trace elements are co-p
Page 719 and 720:
J O NO. ~ 17693-005-019 10000 -f 0
Page 721 and 722:
DAMES & MOORE A DAMES 6 MOORE GROUP
Page 723 and 724:
10 -1: - I e@ i ! 1 I 1 -1 i --- I
Page 725 and 726:
I * pi-- Tailings Pile 1 Tailings P
Page 728 and 729:
DAMES & MOORE A DAMES a MOORE GROUP
Page 730 and 731:
DAMES & MOORE A DAMES 6 MOORE GROUP
Page 732 and 733:
SOURCES: SRK H Flushing Reduced Som
Page 734 and 735:
SOURCES: SRK 'nfi""On Limited Air M
Page 736 and 737:
Figure 6.5-5 DAMES & MOORE 1997 POR
Page 739 and 740:
Page 741 and 742:
SOURCE: SRK Oxidation limit Mn++ Fe
Page 743:
Direct Precipitation IXMES & MOORE
Page 746 and 747:
Infiltration of Snowmelt and Interm
Page 748 and 749:
Notes: Water Runon and Direct Preci
Page 750 and 751:
Surface Water Runon and Direct Prec
Page 752 and 753:
SOURCE: SRK L DAMES ,& MOORE A DAME
Page 754 and 755:
SOURCE: SRK 10 -i DAMES & MOORE + H
Page 756 and 757:
(* 6.0 TRANSPORT AND FATE OF COMPOU
Page 758 and 759:
1 I .J Quartz-rich layeis of 40 per
Page 760 and 761:
Crystalline crusts were observed in
Page 762 and 763:
I ( 4. -.- h .*, Evidence of signif
Page 764 and 765:
Predicted saturation indices (SI) f
Page 766 and 767:
Another iron sulfide mineral at the
Page 768 and 769:
. .. . .I.- ..9 6 If water flow is
Page 770 and 771:
pH Control on Precipitation~Dissolu
Page 772 and 773:
summer. Efflorescence occurs when w
Page 774 and 775:
6.4.1 Evidence of Iron Sulfide Mine
Page 776 and 777:
to the underground mine workings, r
Page 778 and 779:
The pH to copper relationship (Figu
Page 780 and 781:
6.5.1 Air and Water Movement Associ
Page 782 and 783:
.._/ not originating from the under
Page 784 and 785:
,' sulfate discharged from the port
Page 786 and 787:
decreases also, aiding in the disso
Page 788 and 789:
.: ._..I $ . .,'. Seasonal s , - We
Page 790 and 791:
. ., Miring of Seeps with Railroad
Page 792 and 793:
through diffusion. This is indicate
Page 794 and 795:
MlNTEQA2 indicates that the seep wa
Page 796 and 797:
In order to. provide comparative fl
Page 798 and 799:
main source of zinc load (82 percen
Page 800 and 801:
,:..' -- . source areas was estimat
Page 802 and 803:
Monitoring of seeps from drill hole
Page 804 and 805:
,' .... . control and buffering by
Page 806 and 807:
, ; . ..' , . .. .. -. . ..&. .< .
Page 808 and 809:
-- (i,e., portal drainage) for cadm
Page 810 and 811:
Page 812 and 813:
Page 814 and 815:
Page 816 and 817:
T.bk abi Losding WNlatlons - R d W
Page 818 and 819:
TABLE 6.6-3 LOADING CALCULATIONS -
Page 820 and 821:
J O NO. ~ 17693-005-019 Draft Final
Page 824 and 825:
Approximate -1 % Grade for 15OPLeve
Page 826 and 827:
LEGEND SP14 Seep sample location P-
Page 828 and 829:
Oxidant I ZnS H20 (transport mechan
Page 830:
Figure 6.3-4a I SOURCE: SRK Figure
Page 835 and 836:
0 RC 1 0 RC4 A RC7 X RC2 0 RC5 Tail
Page 837 and 838:
0 RC 1 0 RC4 A RC7 X RC2 0 RC5 Tail
Page 839 and 840:
0 RC 1 RC4 A RC7 X RC2 0 RC5 Tailin
Page 841 and 842:
1000 -: 0 RC 1 RC4 A RC7 X RC2 0 RC
Page 843:
P A DAMES MOORE GROUP COMPANY ' + 0
Page 846 and 847:
I ARC7 XRC 2 I I ORC5. Tailings Pil
Page 848 and 849:
ORC 1 ORC 4 ARC 7 XRC2 ORC 5 Tailin
Page 850:
SOURCES: SRK Northwest Geophpysrcal
Page 853 and 854:
Date Figure 6.5-5 DAMES & MOORE 199
Page 855 and 856:
. . . . . . . . . . . . . . . . . .
Page 857 and 858:
0 Acidity Addition Water Runon end
Page 859:
SOURCE: SRK Oxidation limit Mn++ Fe
Page 862 and 863:
In~Vtratim to Grwndwater . Base of
Page 864:
Note: Some flow lost into plane of
Page 868:
Approximate Scale in Feet SOURCE: O
Page 871 and 872:
SOURCE: SRK 1 L 'i +- Holden P-5 (B
Page 873 and 874:
7.0 BASELINE RISK ASSESSMENT Both a
Page 875 and 876:
7.1.1.2 Site-Specific Human Health
Page 877 and 878:
Surface Water Historic and 1997-199
Page 879 and 880:
environment. IHSs were selected for
Page 881 and 882:
Railroad Creek can be utilized by v
Page 883 and 884:
Exposure Routes expected to be redu
Page 885 and 886:
and the USFS guard station. Holden
Page 887 and 888:
No Method A levels are available fo
Page 889 and 890:
7.133 Screening Level Evaluation of
Page 891 and 892:
they are not expected to present an
Page 893 and 894:
Sediment Railroad Creek and Site Hi
Page 895 and 896:
the ventilator portal drainage is n
Page 897 and 898:
are based on different mechanistic
Page 899 and 900:
Selection of.Target Risk and Hazard
Page 901 and 902:
Noncarcinogens: Inhalation of Air w
Page 903 and 904:
where: PEF = Particulate emission f
Page 905 and 906:
arsenic in the USFS guard station s
Page 907 and 908:
Use of toxicity criteria (CPFs and
Page 909 and 910:
7.1.5.4 Surface Water and Fish Surf
Page 911 and 912:
identify dismbutions of compounds o
Page 913 and 914:
most abundant species in Railroad C
Page 915 and 916:
mechanisms, PCOCs originating from
Page 917 and 918:
copper, lead, and zinc is shown in
Page 919 and 920:
Measurement Endpoints Measurement e
Page 921 and 922:
to the extrapolation to low hardnes
Page 923 and 924:
concentration that contains the bio
Page 925 and 926:
Lupinus bicolor, and Trijolium praf
Page 927 and 928:
Although certain benthic invertebra
Page 929 and 930:
estimated from the available liver
Page 931 and 932:
of between a low of 34 ha. for does
Page 933 and 934:
Little Brown Bat The little brown b
Page 935 and 936:
Since none of the UCL concentration
Page 937 and 938:
, Hazard quotients for osprey consu
Page 939 and 940:
appropriate metric for protection o
Page 941 and 942:
Table 7.2.4-1 1A shows that red-tai
Page 943 and 944:
7.2.5 SOURCES OF UNCERTAINTY Limita
Page 945 and 946:
laboratory studies to field exposur
Page 947 and 948:
I I tailings piles difficult. Likew
Page 949 and 950:
other mine sites where plants &re s
Page 951 and 952:
TABLE 7.0-1 . KEY OF SITE FEATURES
Page 953 and 954:
Page 955 and 956:
Page 957 and 958:
' TABLE 7.18 STATISTICAL ANALYSJS A
Page 959 and 960:
TABLE 7.14 STAnSTlCAL EVALUATION AN
Page 961 and 962:
TABLE 7.14 STATISTICAL EVALUATION A
Page 963 and 964:
TABLE 7.14 STATISTICAL EVALUATION A
Page 965 and 966:
TABLE 7.14 COMPARISON OF SEDIMENTAR
Page 967 and 968:
H:Wolden\Drafl final ri rpt\S-7\Hhr
Page 969 and 970:
TABLE 7.14 SURFACE WATER AREA BACKG
Page 971 and 972:
H.Wolden\drafl final rirpt\S-7WhraU
Page 973 and 974:
TABLE 7.1-E SURFACE WATER AREA BACK
Page 975:
TABLE T.1-F STATISTICAL ANALYSIS AN
Page 978 and 979:
TABLE 7.1 -F STATISTICAL ANALYSIS A
Page 980:
H.Wolden\dratl hnal rirpnsrpns7Whra
Page 983 and 984:
TABLE 7.10 STATISTICAL ANALYSIS AND
Page 985 and 986:
Page 987 and 988:
TABLE 7.144 STATISTICAL ANALYSIS AN
Page 989 and 990:
Page 991 and 992:
TABLE 7.144 STATISTICAL ANALYSIS AN
Page 993 and 994:
Xluo sanlm pawlap uo paseq aJe suo!
Page 995 and 996:
TABLE 7.14 STAllSllCM ANALYSIS AND
Page 997 and 998:
TABLE 7.1 J MSTORKM AJR MONITORING
Page 999 and 1000:
TABLE 7.1-1 AREA AND NATURAL BACKGR
Page 1002 and 1003:
TABLE 7.1-4 TOXICITY CRITERIA AND B
Page 1004 and 1005:
TABLE 7.14 HUMAN HEALTH SCREENING O
Page 1006 and 1007:
TABLE 7.14 HUMAN HEALTH SCREENING O
Page 1008 and 1009:
TABLE 7.1-10 HUMAN HEALTH SCREENING
Page 1011 and 1012:
Page 1013 and 1014:
TABLE 7.1-15 HUMN HEALTH SCREENING
Page 1015 and 1016:
Page 1017 and 1018:
Page 1019 and 1020:
TABLE 7.1 -21 HUMAN HEALTH SCREENIN
Page 1021 and 1022:
Page 1023 and 1024:
Page 1025 and 1026:
Page 1027 and 1028:
TABLE 7.1-29 HUMANHEALTHSCREENINGOF
Page 1029:
Page 1032 and 1033:
Page 1034 and 1035:
TABLE 7.1-36 EXPOSURE PATHWAYS AND
Page 1036 and 1037:
TABLE 7.1 -38 TOXICITY CRITERIA AND
Page 1038 and 1039:
TABLE 7.1.40 SITE-SPECIFIC METHOD C
Page 1040 and 1041:
TABLE 7.142 CALCUIATION OF CANCER R
Page 1042 and 1043:
Constituent Aluminum Arsenic Acute
Page 1044 and 1045:
Constituent Chromium Copper Acute T
Page 1046 and 1047:
Constituent Selenium Zinc Gasoline
Page 1048 and 1049:
TABLE 7.2.2-1A STATISTICAL ANALYSIS
Page 1050 and 1051:
H.\Holden\Draft final ri rpt\S_7\ec
Page 1052 and 1053:
TABLE 7.2.2-162 STATISnCAL ANALYSIS
Page 1054 and 1055:
TABLE 7.2.2-1C COMPARISON OF TOTAL
Page 1056 and 1057:
TABLE 7.2.2-1C =b COMPARISON OF SED
Page 1058 and 1059:
'a TABLE I 7.2.2-1D SUMMARY OF RI F
Page 1060 and 1061:
TABLE 7.2.2-1E STATISTICAL ANALYSIS
Page 1062 and 1063:
TABLE 7.2.2-1F STATISTICAL ANALYSIS
Page 1064 and 1065: TABLE 7.2.2-1F STATISTICAL ANALYSIS
Page 1066 and 1067: TABLE 7.2.2-1F STATISTICAL ANALYSIS
Page 1068 and 1069: TABLE 7.22-1G STATISTICAL ANALYSIS
Page 1070 and 1071: TABLE 7.22-10 STAT~SMAL ANALYSIS AN
Page 1072 and 1073: - - -. TABLE 7.2.2-1H STATISTICAL A
Page 1074 and 1075: TABLE 7.2.2-1H STATISTICAL ANALYSIS
Page 1076 and 1077: TABLE 7.2.2-1 H STATISTICAL ANALYSI
Page 1078 and 1079: TABLE 7.2.2-1H STATISTICAL ANALYSIS
Page 1080 and 1081: TABLE 7.2.2-2 (CONTINUED) SPECIES O
Page 1082 and 1083: TABLE 7.2.2-4 SUMMARY OF REPRESENTA
Page 1084 and 1085: TABLE 7.2.3-1B RESULTS OF PEER-REVI
Page 1086 and 1087: TABLE 7.2.3-2B RESULTS OF PEER-REVI
Page 1088 and 1089: TABLE 7.2.3-3B SOIL CONCENTRATIONS
Page 1090 and 1091: , TABLE 7.2.3-4B TOXICITY REFERENCE
Page 1092 and 1093: " Metal C Atscnic Cadmium Copper Le
Page 1094 and 1095: TABLE 7.2.3-8 DOSES TO OSPREY CONSU
Page 1096 and 1097: Biota Plants Cd Cu Pb Zn Earthworms
Page 1098 and 1099: TABLE 7.2.3-12 DOSES TO MULE DEER H
Page 1100 and 1101: TABLE 7.2.3-14 DOSES TO MINK CONSUM
Page 1102 and 1103: TABLE 7.2.3-16 DOSES TO RED-TAILED
Page 1104 and 1105: TABLE 7.2.3-18 DOSES TO BAT HOLDEN
Page 1106 and 1107: TABLE 7.2.4-2a HAZARD QUOTIENTS FOR
Page 1108 and 1109: TABLE 7.2.4-2D a HAZARD QUOTIENTS F
Page 1110 and 1111: TABLE 7.2.4-4 HAZARD QUOTIENTS FOR
Page 1112 and 1113: TABLE 7.2.4-6a HAZARD QUOTIENTS FOR
Page 1116 and 1117: TABLE 7.2.4-10a HAZARD QUOTIENTS FO
Page 1118 and 1119: TABLE 7.2.4-12a HAZARD QUOTIENTS FO
Page 1120 and 1121: TABLE 7.2.4-14 HAZARD QUOTIENTS FOR
Page 1122 and 1123: Figure 7.0-2 HDA~VE~~LMOORE RAILROA
Page 1124 and 1125: I SOURCE RELEASE EXPOSURE . MECHANI
Page 1126 and 1127: MEDIA FIGURE 7.1-3 FLOW CHART ILLUS
Page 1128 and 1129: I I 8.1 INTRODUCTION 8.0 DISCUSSION
Page 1130 and 1131: 8.2.2 Geology 8.2.2.1 Railroad Cree
Page 1132 and 1133: The bedrock in the mine has been ma
Page 1134 and 1135: Railroad Creek and Copper Creek. Th
Page 1136 and 1137: where Railroad Creek flows directly
Page 1138 and 1139: A 500-year event was not analyzed,
Page 1140 and 1141: i flow associated with two seeps ad
Page 1142 and 1143: Western Portion of Site Undermound
Page 1144 and 1145: native soil is of higher permeabili
Page 1146 and 1147: Macroinvertebrate sampling included
Page 1148 and 1149: Above Tenmile Creek Confluence (RC-
Page 1150 and 1151: Reference Reaches - Stehekin River
Page 1152 and 1153: 3 during the 1997 investigation ind
Page 1154 and 1155: Subsurface Soils Cadmium, copper, a
Page 1156 and 1157: Station' RC-4 RC-7 RC-2 RC-5 RC-10
Page 1158 and 1159: 8.3.4.1 Western Portion of Site Dur
Page 1160 and 1161: 0 mine, Honeymoon Heights, the wast
Page 1162 and 1163: I . During The water from the west
Page 1164 and 1165:
a The Copper Creek diversion accoun
Page 1166 and 1167:
8.5.2.1 Trout An intem~ediate poten
Page 1168 and 1169:
i SOURCE: Walten et al., 1992 USGS
Page 1170 and 1171:
Page 1172 and 1173:
NOTE: This cross section is general
Page 1174 and 1175:
D.7 D. 8 D. 9 E.0 SOURCE: Base map
Page 1176 and 1177:
9.2.2 Site Surface WaterIGroundwate
Page 1178 and 1179:
9.2.4.1 Portal Drainage The chemica
Page 1180 and 1181:
Groundwater discharge from the tail
Page 1182 and 1183:
The combined results of the ERA and
Page 1184 and 1185:
9.2.11 . Winston Home Sites Fuel St
Page 1186 and 1187:
SOURCE: USGS Topographic Map, State
Page 1189 and 1190:
Page 1191 and 1192:
10.0 PROJECT SCHEDULE The, schedule
Page 1193 and 1194:
I ATSDR. 1990. Toxicological profil
Page 1195 and 1196:
Dames & Moore, 1998b. Phase I11 Rem
Page 1197 and 1198:
Ebbutt,%F. 1956. Letter Report to V
Page 1199 and 1200:
';i 1 Products, Shale-oils and Soot
Page 1201 and 1202:
Leland, H.V. and J.L. Carter. 1984.
Page 1203 and 1204:
I Pacific Northwest Laboratory. 199
Page 1205 and 1206:
Seed, H.B., Idriss, I.M. and Arango
Page 1207 and 1208:
U.S. EnvirOnmcntal Protection Agenc
Page 1209 and 1210:
U.S.n.>.,. .F(zxli,st S::a;ice.. 19
Page 1211:
l#e~ehat~ihi& ~ati'onsi '~ol'c!en.~
Page 1214 and 1215:
7 MEMORANDUM Date: To: From: Subjec
Page 1216 and 1217:
INORGANICS ANALYSIS DATA SHEET Samp
Page 1218 and 1219:
Page 1220 and 1221:
G CHAIN-OF-CUSTODY RECORD WHITE COP
Page 1222 and 1223:
June 15, 1998 Surface Water, May 19
Page 1224 and 1225:
Page 1226 and 1227:
Page 1228 and 1229:
Page 1230 and 1231:
I INORGANICS ANALYSIS DATA SHEET TO
Page 1232 and 1233:
INORGANICS ANALYSIS DATA SHEET Synp
Page 1234 and 1235:
Page 1236 and 1237:
INORGANICS ANALYSIS DATA SHEET TOTA
Page 1238 and 1239:
- INORGANICS ANALYSIS DATA SHEET Sa
Page 1240 and 1241:
Page 1242 and 1243:
Page 1244 and 1245:
Page 1246 and 1247:
Page 1248 and 1249:
TOTAL METALS Lab Sample ID: W219AH
Page 1250 and 1251:
INORGANICS ANALYSIS DATA SHEET - DI
Page 1252 and 1253:
INORGANICS ANALYSIS DATA SHEET DISS
Page 1254 and 1255:
INORGANICS 'ANALYSIS DATA SHEET Sam
Page 1256 and 1257:
Page 1258 and 1259:
Page 1260 and 1261:
Page 1262 and 1263:
Page 1264 and 1265:
Page 1266 and 1267:
Page 1268 and 1269:
Page 1270 and 1271:
Page 1272 and 1273:
Page 1274 and 1275:
IKOXGANICS ANALYSIS DATA SHEET Lab
Page 1276 and 1277:
Final Report Laboratory Analysis of
Page 1278 and 1279:
Page 1280 and 1281:
QA Report - Method Blank Analyeis Q
Page 1282 and 1283:
QA Report - Matrix Spike/~atrix Spi
Page 1284 and 1285:
QA Report - Standard Reference Mate
Page 1286 and 1287:
@ TOTAL GASOLINE RANGE HYDROCARBONS
Page 1288 and 1289:
TOTAL DIESEL RANGE HYDROCARBONS WA
Page 1290 and 1291:
CHAIN-OF-CUSTODY RECORD , > >~LINQU
Page 1292 and 1293:
Page 1294 and 1295:
Sample No: RC-2 Lab .Sample ID: W21
Page 1296 and 1297:
@ QA Report - Replicate Analysis QC
Page 1298 and 1299:
QA Report - Laboratory Control Samp
Page 1300 and 1301:
TOTAL GASOLINE RANGE HYDROCARBONS w
Page 1302 and 1303:
TOTAL DIESEL RANGE HYDROCARBONS TPH
Page 1304 and 1305:
CHAIN-OF-CUSTODY RECORD WHITE COPY-
Page 1306 and 1307:
Page 1308 and 1309:
June 8,1998 Seep and Portal, May 19
Page 1310 and 1311:
June 8, 1998 Seep and Portal, May 1
Page 1312 and 1313:
1 DISSOLVED METALS Lab Sample ID: W
Page 1314 and 1315:
Page 1316 and 1317:
Page 1318 and 1319:
Page 1320 and 1321:
Page 1322 and 1323:
Page 1324 and 1325:
I a INORGANICS ANALYSIS DATA SHEET
Page 1326 and 1327:
Page 1328 and 1329:
Page 1330 and 1331:
.I.V. Lots 869-6 and 867-12 Lab Sam
Page 1332 and 1333:
INORGANICS ANALYSIS DATA SHEET DISS
Page 1334 and 1335:
TOTAL METALS Lab Sample ID: W222C L
Page 1336 and 1337:
METALS ANALYSIS DATA SHEET DISSOLVE
Page 1338 and 1339:
Sample No: P-1 Lab Sample ID: W222A
Page 1340 and 1341:
Sample No: VP-1 Lab Sample ID: W222
Page 1342 and 1343:
Page 1344 and 1345:
Final Report Laboratcrf Analysis of
Page 1346 and 1347:
Final Report Laboratory Analysie of
Page 1348 and 1349:
4D QA Report - Replicate Analysis Q
Page 1350 and 1351:
e QA Report - Laboratory Control Sa
Page 1352 and 1353:
Sample No: SP-27 Lab Sample ID: W26
Page 1354 and 1355:
QC Report No: W264-Dames & Moore Ma
Page 1356 and 1357:
QA Report - Standard Reference Mate
Page 1358 and 1359:
Page 1360 and 1361:
a,, MEMORANDUM Date: June 8,1998 To
Page 1362 and 1363:
June 8, 1998 Equipment Blank, May 1
Page 1364 and 1365:
Page 1366 and 1367:
Page 1368 and 1369:
MEMORANDUM Date: June 15,1998 To: R
Page 1370 and 1371:
. June 15,1998 Low Level Lead, May
Page 1372 and 1373:
" QC Summary for Dames and Moore Re
Page 1374 and 1375:
I fa I / - Froi~tler Geosciences In
Page 1376 and 1377:
Date: To: From: Subject: June 25, 1
Page 1378 and 1379:
June 25, 1998 Ventilator Portal, Ju
Page 1380 and 1381:
Page 1382 and 1383:
. Lab ' INORGANICS ANALYSIS DATA SH
Page 1384 and 1385:
Page 1386 and 1387:
December 1 1, 1998 Sediment Data, F
Page 1388 and 1389:
December 1 1, 1998 Sediment Data, F
Page 1390 and 1391:
Page 1392 and 1393:
Page 1394 and 1395:
Page 1396 and 1397:
' INORGANICS ANALYSIS DATA SHEW Sam
Page 1398 and 1399:
Page 1400 and 1401:
e. INORGANICS ANALYSIS DATA SHEET S
Page 1402 and 1403:
Page 1404 and 1405:
Page 1406 and 1407:
Page 1408 and 1409:
INORQANICS ANALYSIS DATA SHEET Samp
Page 1410 and 1411:
@ INORGANIC ANALYSIS DATA SHEET TOT
Page 1412 and 1413:
INORGANICS ANALYSIS DATA SHBBT Samp
Page 1414 and 1415:
Page 1416 and 1417:
a Final Report Laboratory Analysis
Page 1418 and 1419:
0 Final Report Laboratory Analysie
Page 1420 and 1421:
a - Final Report Laboratory Analyei
Page 1422 and 1423:
Final Report Laboratory Analyeis of
Page 1424 and 1425:
a; Organic 3. - ., Final Report Lab
Page 1426 and 1427:
-. Final Report Laboratory Analysis
Page 1428 and 1429:
Final Report Laboratory Analyeis of
Page 1430 and 1431:
Final Report Laboratory Analyeie of
Page 1432 and 1433:
, @: Final Report Laboratory Analys
Page 1434 and 1435:
: QA Report - Method Blank Analyeie
Page 1436 and 1437:
QA Report - Matrix Spikq/Matrix Spi
Page 1438 and 1439:
Data Release Authorized: Reported:
Page 1440 and 1441:
Rosa Environmental and ~eechnlcal L
Page 1442 and 1443:
ROSA ENVIRONMENTAL & GEOTECHNICAL L
Page 1444 and 1445:
4 ROSA ENVIRONMENTAL & GEOTECHNICAL
Page 1446 and 1447:
Page 1448 and 1449:
f ROSA ENVIRONMENTAL & GEOTECHNICAL
Page 1450 and 1451:
Page 1452 and 1453:
Page 1454 and 1455:
ROSA ENVIRONMENTAL 8 GEOTECHNICAL L
Page 1456 and 1457:
-1m , ROSA ENVIRONMENTAL 8 GEOTECHN
Page 1458 and 1459:
ROSA ENVIRONMENTAL.& GEOTECHNICAL L
Page 1460 and 1461:
-. JII I I ROSA ENVIRONMENTAL & GEO
Page 1462 and 1463:
Matrlx I 1 Chain of Custody Record
Page 1464 and 1465:
main ot ~ustody Record Lake Washing
Page 1466 and 1467:
Chain of Custody Record 5 Parametrl
Page 1468 and 1469:
July 2, 1999 Sediment Data, Fall 19
Page 1470 and 1471:
INORGANICS ANALYSIS DATA SKBBT Samp
Page 1472 and 1473:
MEMORANDUM Date: December 8, 1998 T
Page 1474 and 1475:
1 Dccember 8, 1998 Background Soil
Page 1476 and 1477:
I INORGANICS ANALYSIS DATA SHEET Sa
Page 1478 and 1479:
* INORGANICS ANALYSIS DATA SHEET Sa
Page 1480 and 1481:
Page 1482 and 1483:
a , INORGANICS ANALYSIS DATA SHEET
Page 1484 and 1485:
' @, INORGANICS ANALYSIS DATA SHEET
Page 1486 and 1487:
Page 1488 and 1489:
Page 1490 and 1491:
Page 1492 and 1493:
Page 1494 and 1495:
0 INORGANICS ANALYSIS DATA SHEET Sa
Page 1496 and 1497:
0 INORGANICS ANALYSIS DATA SHEET Sa
Page 1498 and 1499:
Page 1500 and 1501:
' 0 INORGANICS ANALYSIS DATA SHEET
Page 1502 and 1503:
INORGANIC ANALYSIS DATA SHEET ' TOT
Page 1505 and 1506:
CHAIN-OF-CUSTODY RECORD >*" WHITE C
Page 1507 and 1508:
December 8, 1998 Lagoon Soil Sample
Page 1509 and 1510:
December 8, 1998 Lagoon Soil sample
Page 1511 and 1512:
Page 1513 and 1514:
Page 1515 and 1516:
Page 1517 and 1518:
Page 1519 and 1520:
Page 1521 and 1522:
Page 1523 and 1524:
Page 1525 and 1526:
Page 1527 and 1528:
Page 1529 and 1530:
Page 1531 and 1532:
DAMES & MOORE . A DAMES a MOORE GRo
Page 1533 and 1534:
G:\WPDATA\OOS\REPORTSWOLDEN-2WTable
Page 1535:
lnlilling - Emer qpqwktc a&r&iax fm
Page 1539 and 1540:
ROCK SRUCTURAL DATA FIELDSHEET JOB
Page 1541 and 1542:
; Comparisons RC-1' RC-4" IogRC-1'
Page 1543 and 1544:
G:\WPDATA\OOJ\REPORTSWOLDEN-ZWTable
Page 1545 and 1546:
' AXA WSECTA Capni idee Despaxia au
Page 1547 and 1548:
WCROINVERTEBRATE DENSITY CLIENT: DA
Page 1549 and 1550:
'MA Capni idae Dormria baunerni Meg
Page 1551 and 1552:
MCROINVERTEBRATE DENSITY CLIENT: DA
Page 1553 and 1554:
UCROINVERTEBRATE DENSITY CLIENT: DA
Page 1555 and 1556:
MACROINVERTEBRATE DENSITY CLIENT: D
Page 1557 and 1558:
m TR'CHOPTEiU lUCROlNVERTEBRATE DEY
Page 1559 and 1560:
Dugesfa sp. Polycelis cormeta Mid.
Page 1561 and 1562:
MACROINVERTEBRATE DENSITY CLIENT: O
Page 1563 and 1564:
Vial Number Order Taxa Site E-8 Eph
Page 1565 and 1566:
Slide Number DM 1097- 1 DM 1097- 1
Page 1567:
@ August 11,1997 Linda Krippner Dam
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Dames & Moore, 1999 - USDA Forest Service

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