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Sample number Date collected Sample type Area Sampling Location Description EM-1 10/08/02 surface upper Northernmost upper waste pile at west end of...

Hello There...

Thank You so much for helping me. I worked on the Aquatic and HQ now for 5 days and still couldn't figure it out, so thanks for your time.


Did you happen to know how to do the Hazard Quotient ones?

Question: The hazard quotient for the surface-water concentration at site EB-1 relative to the acute surface-water toxicity limit (CMC) for copper at that site is ___________________________. Provide your answer to one decimal place (X.X). I need EB-1 thru OR-3.


For the Excel spreadsheet, here is the formula you should be using to calculate the CMC

(((0.9422)*(LN(H7))-1.7))*0.96


I hope that helps you figure out the CMC.


https://www.epa.gov/wqs-tech/supplemental-module-aquatic-life-criteria


https://www.epa.gov/wqc/national-recommended-water-quality-criteria-aquatic-life-criteria-table

Area Sampling Location Description EM-1 10/08/02 EM-2 10/08/02 EM-3 10/08/02 EM-4 10/08/02 EM-5 10/08/02 EM-6 10/08/02 EM-7 10/08/02 EM-8 10/08/02 Oxidized surface material. EM-9 10/08/02 Replicate of 02Ely7A EM-10 10/08/02 roast beds EM-11 10/09/02 EM-12 10/09/02 slag pile Composite of small pieces of slag at base of the pile. EM-13 10/08/02 Soil in wooded area at the top of the smoke flue. EM-14 06/27/00 EM-15 06/27/00 Flotation mill area. Sample number Date collected Sample type surface composite of soil upper waste piles Northernmost upper waste pile at west end of upper waste area. Area measures about 14.6 m (48 ft) (E-W) by 38.4 m (126 ft) (N-S); includes small pile at 24.4 m (80 ft) east of A1 beyond stand of trees. A1-A6-E1-E6 defines roughly rectangular area; A7 is location of small pile 24.4 m (80 ft) E of A1. Surface is littered with fist- to boulder-size oxidized ore and waste rock (subequal amounts). Country rock is shaley, greenish schist that forms smaller particles. surface composite of soil upper waste piles Southwestern upper waste pile below road. Samples 10 across x 3 high. At center line, area is about 43 m (140 ft) across by 15 m (50 ft) wide. Locally at west end area includes dump area below timber loading platform(?), wet areas, clayey at depth, white salts around base of rocks and on soil. surface composite of soil upper waste piles Boulder slope below road above flat top of area 02Ely2. Traversed across length and height of pile. Average boulder size 30 cm by 5 cm. Black, schistose ore with red oxidized surfaces and rusty- colored lichen coatings. surface composite of soil upper waste piles South-central part of upper waste dumps. Stonewall gully is the east end (break between waste rock on area 4 and more ore on area 5). Traversed 10 rows across ~EW (43 m) and 3 rows high (~NS). Top 2 rows on bench, 3rd row on accessible parts of slope. Trees at base of slope. Mine waste pile with abundant waste rock and little ore. Parts of slope covered with boulders; other parts are bare soil. surface composite of soil upper waste piles South-east corner of upper waste pile. Sampled 5 across (23 m across EW) x 6 vertical (49 m NS). Waste pile with ore, decomposed ore forms local black soil . Note salts forming on soil surface at east end (Relative Humidity 27%, Temperature ~17°C (63 °F) surface composite of soil upper waste piles Irregular, diamond-shaped area above the seeps. See air photo for extent. Sampled 6 x 5 stations. Heterogeneous area, local trees and roots, bare slope with ore, gray areas, yellow areas. surface composite of soil lower waste piles Lower waste piles above the road sampled 10 stations parallel to the road by 3 stations perpendicular to the road. Sample 02Ely9 is a replicate sample of the same area. grab sample lower waste piles Flotation mill tailings at north end of lower waste piles and east of mine access road intersection, downhill from cement foundation. Area of tailings appears to extend over a distance of about 25 m E-W along the mine access road and about 4 m in a N-S direction across the road to the stream edge. surface composite of soil lower waste piles surface composite of soil Partially roasted ore sampled 10 stations long by 3 stations wide (long = parallel to the road. Note that the old road runs through this area. Mostly red surface are. Locally, especially at the north end, very bright red. surface composite of soil smelter site Sampled 10 stations (parallel to the road) x 3 stations perpendicular to the road. Sampled in clearing between the stone wall and the road. surface composite grab soil sample soil around top of smoke flue surface composite of soil lower waste piles Lowest mine dump directly along Ely Brook on both sides of the road. Replicate sample of 98JH-Ely-EB sample area. surface composite of soil lower waste piles
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Copper Concentrations of Mine Waste Samples Sample Cu Cu mg/kg HQ resid. PRG-residential mg/kg 3100 3100 PRG-industrial mg/kg 41000 EM-1 3,680 1.19 EM-2 2,320 0.75 EM-3 5,660 1.83 EM-4 2,050 0.66 EM-5 3,250 1.05 EM-6 4,220 1.36 EM-7 7,020 2.26 EM-8 2,240 0.72 EM-9 6,940 2.24 EM-10 2,040 0.66 EM-11 2,780 0.9 EM-12 6,880 2.22 EM-13 45 0.01 EM-14 5,100 1.65 EM-15 2,400 0.77
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