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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

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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The use of the BLM to predict the bioavailability and toxicity of copper to aquatic organisms under site-specific conditions... View the full answer

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