2021-01-14_REVISION - M1977300 ‎(3)‎

• Permit No: M1977300
• IBM Index Class Name: REVISION
• Doc Date: 1/14/2021
• Doc Name: Adequacy Review Response #3
• From: Colorado Legacy Land
• To: DRMS
• Email Name: AME
• Media Type: D
• Archive: No

COLORADO LEGACY LAND
SCHWARTZWALDER MINE
TABLE E-4. MINE PERMIT#M-1977-300,QUARTERLY SURFACE WATER AND GROUNDWATER SAMPLE SUMMARY
Surface Water Quality
Surface Water Quality Standards(CDPHE,2018)A Standard,Segment 17b,
Ralston Creek
(CDPHE,2019)B Colorado
Anal to CAS No. Units Z Aquatic Life 2 Groundwater Sample Analytical Detection Sample Suite
Y Human Health Aquatic Life (Dissolved Quality Standards Type Method(s) Limit Name
(Total Concentrations) (Dissolved Concentrations) Concentrations) (CDPHE,2016)c
Domestic Chronic
Water Agriculture Water+ Acute 30-Day Acute Chronic
Supply Fish 1-Day Average
General Properties and Field Parameters
400 mg/1 or 1.25 times
Total Dissolved Solids TDS mg/L _ the background level, Grab SM2540C 20 Sample Suite#3
whichever is least
restrictive
Total Suspended Solids - mg/L - Grab SM2540D 5 Sample Suite#3
Field Parameter-Temperature Temp °C - Sample Suite#3
Field Parameter-Conductivity µS/cm - Sample Suite#3
Field Parameter-pH pH unitless 6.5-9.0 6.5-8.5 N/A- Field Parameter Sample Suite#3
Field Parameter-ORP mV - Sample Suite#3
Field Parameter-Dissolved DO mg/L 6.0-7.0
0 en 3 Sam le Suite#3
Major Ions
Total Alkalinity(as CaCO3) CASID10001 mg/L _ Grab SM2320B- 2 Sample Suite#3
Bicarbonate(as CaCO3) 3983-19-5 mg/L - Grab Titration Sample Suite#3
Calcium 7440-70-2 mg/L _ - _ Grab M200.7 ICP 0.1 Sample Suite#3
Chloride 7782-50-5 mg/L 0.25 - 250 250 Grab SM4500 0.5 Sample Suite#3
Fluoride 16984-48-8 mg/L _ - - 4 Grab SM450OF 0.11 Sample Suite#3
Magnesium 7439-95-4 mg/L - _ Grab M200.7 ICP 0.2 Sample Suite#3
Potassium 7440-09-7 mg/L Grab M200.7 ICP 0.2 Sample Suite#3
Sodium 7440-23-5 mg/L _ - _ Grab M200.7 ICP 0.2 Sample Suite#3
D516-02/-07/-
Sulfate mg/L 250 Grab 11 1 Sample Suite#3
14808-79-8 0.25 250 Turbidimetric
Nutrients/Other
Boron 7440-42-8 mg/L 0.75 0 Grab M200.7 ICP 0.02 Sample Suite#3
Nitrate+Nitrite Total N mg/L 10 10 Grab M365.3 2.02 Sample Suite#5
Phosphate 14265-44-2 mg/L - - - Grab Calculation Calculation Sample Suite#3
Phosphorus 7723-14-0 mg/L 0.11 - 0.11 - Grab M365.1 0.01 Sample Suite#3
Cyanide(weak acid dissociable) 57-12-5 mg/L 0.005 - 0.2 Grab SM4500 0.003 Sample Suite#3
JANUARY 2021 31 AMENDMENT 5