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TMDL Document for COURTOIS CREEK

TMDL ID: 39258 TMDL Name: COURTOIS CREEK
State/Tribe: Missouri TMDL Date: 09/17/2010
EPA Action: EPA Approved Comments: "NOTE FOR POLLUTANT LEAD(18): NO PUBLIC MEETINGS. MOS IS IMPLICIT DUE TO CONSERVATIVE ASSUMPTIONS. WLA IS ASSIGNED AS ONE TOTAL VALUE OF 0.12 LBS/DAY IN INDIAN CREEK, 0.01 LBS/DAY IN TRIBUTARY TO INDIAN AND 0.78 LBS/DAY IN COURTOIS CREEK. LA IS ZERO AT LOW FLOW (80-100 PERCENT FLOW EXCEEDANCES). VALUE LISTED IS THE 60 PERCENT FLOW EXCEEDANCE FROM THE LDC (0.13,0.02,0.91). NOTE FOR POLLUTANT ZINC(21): NO PUBLIC MEETINGS. MOS IS IMPLICIT DUE TO CONSERVATIVE ASSUMPTIONS. WLA IS ASSIGNED AS ONE TOTAL VALUE OF 4.11 LBS/DAY IN INDIAN CREEK, 0.41 LBS/DAY IN TRIBUTARY TO INDIAN AND 29.12 LBS/DAY IN COURTOIS CREEK. LA IS ZERO AT LOW FLOW (80-100 PERCENT FLOW EXCEEDANCES). VALUE LISTED IS THE 60 PERCENT FLOW EXCEEDANCE FROM THE LDC (4.79,0.48,34.02)."

TMDL Documents

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TMDL  

TMDL Pollutant: Lead

Total Waste Load Allocation: .78      Total Load Allocation: .13
Explicit Margin Of Safety:      Implicit Margin Of Safety: Y
Units for Total Waste Load Allocation and Total Load Allocation: LBS/DAY      TMDL Pollutant Source Type: Point/Nonpoint Source
TMDL End Point: "WATER QUALITY STANDARDS ATTAINMENT: THE APPLICABLE MISSOURI WQS FOR THE LEAD AND ZINC TMDLS IS: 10 CSR 20-7.031(4)(B)1 WATER CONTAMINANTS SHALL NOT CAUSE THE CRITERIA IN TABLES A AND B TO BE EXCEEDED. CONCENTRATIONS OF THESE SUBSTANCES IN BOTTOM SEDIMENTS OR WATERS SHALL NOT HARM BENTHIC ORGANISMS AND SHALL NOT ACCUMULATE THROUGH THE FOOD CHAIN IN HARMFUL CONCENTRATIONS, NOR SHALL STATE AND FEDERAL MAXIMUM FISH TISSUE LEVELS FOR FISH CONSUMPTION BE EXCEEDED. CURRENT LEAD AND ZINC CRITERIA FOR THE PROTECTION OF AQUATIC LIFE USE ARE EXPRESSED IN DISSOLVED FORM IN UNITS OF MICROGRAMS PER LITER (UG/L). THESE CRITERIA ARE HARDNESS DEPENDENT AND CALCULATED FROM THE FORMULAS SHOWN BELOW FROM TABLE A OF 10 CSR 20-7.031: DISSOLVED LEAD ACUTE = E(1.273*LN(HARDNESS) -1.460448)*( 1.46203-(LN (HARDNESS)*0.145712)) = UG/L CHRONIC = E(1.273*LN(HARDNESS) - 4.704797)*( 1.46203-(IN (HARDNESS)*0.145712)) = UG/L DISSOLVED ZINC ACUTE = E(0.8473*LN(HARDNESS)+0.884211)* 0.978 = UG/L CHRONIC = E (0.8473*LN(HARDNESS) +0.785271)* 0.986 = UG/L WHERE ""E"" IS THE BASE OF THE NATURAL LOGARITHM (APPROXIMATELY 2.718) AND ""LN"" IS THE NATURAL LOGARITHM. THE APPLICABLE MISSOURI WQS FOR HARDNESS ARE: HARDNESS 50?74 75?99 100?124 125?149 150?174 175?199 200?224 225?249 250+ LEAD UG/L ACUTE 30 47 65 82 100 118 136 154 172 CHRONIC 1 2 3 3 4 5 5 6 7 ZINC UG/L ACUTE 65 92 117 142 165 188 211 233 255 CHRONIC 59 84 107 129 151 172 193 213 233 THE 25TH PERCENTILE HARDNESS VALUE MUST BE USED TO CALCULATE HARDNESS-DEPENDENT METALS CRITERIA (PER 10 CSR 20-7.031). 25TH PERCENTILE HARDNESS LEAD ZINC ACUTE CHRONIC ACUTE CHRONIC COURTOIS CREEK 170 MG/L 114 UG/L 4.5 UG/L 184 UG/L 168 UG/L INDIAN CREEK 225 MG/L 154 UG/L 6 UG/L 233 UG/L 213 UG/L TRIBUTARY TO INDIAN CREEK 154 UG/L 6 UG/L 233 UG/L 213 UG/L TRIBUTARY TO INDIAN CREEK RUNS FOR 0.3 MILES AND IS ENTIRELY CONTAINED WITHIN WASHINGTON COUNTY, AND IS CONTAINED WITHIN THE INDIAN CREEK WATERSHED. HARDNESS DATA FOR TRIBUTARY TO INDIAN CREEK WAS NOT AVAILABLE. THE INDIAN CREEK VALUES ARE REPRESENTATIVE OF THE ENTIRE INDIAN CREEK WATERSHED INCLUDING TRIBUTARY TO INDIAN CREEK. THE WATER QUALITY TARGETS FOR LEAD AND ZINC WILL BE BASED ON THE CHRONIC CRITERIA TO ENSURE AQUATIC LIFE WILL BE PROTECTED FROM ACUTE AND CHRONIC TOXICITY. TARGETS (BOLDED IN THE TABLE ABOVE) FOR COURTOIS CREEK ARE 4.5 UG/L FOR LEAD AND 168 UG/L FOR ZINC. TARGETS FOR INDIAN CREEK AND THE TRIBUTARY TO INDIAN CREEK ARE 6 UG/L FOR LEAD AND 213 UG/L FOR ZINC. THE BENEFICIAL USES FOR BOTH INDIAN CREEK (1946) AND TRIBUTARY TO INDIAN CREEK (3663) ARE: LIVESTOCK AND WILDLIFE WATERING PROTECTION OF WARM-WATER AQUATIC LIFE PROTECTION OF HUMAN HEALTH (FISH CONSUMPTION) WHOLE BODY CONTACT RECREATION - CATEGORY B THE BENEFICIAL USES FOR COURTOIS CREEK (1943) ARE: LIVESTOCK AND WILDLIFE WATERING PROTECTION OF COOL-WATER AQUATIC LIFE PROTECTION OF WARM-WATER AQUATIC LIFE PROTECTION OF HUMAN HEALTH (FISH CONSUMPTION) WHOLE BODY CONTACT RECREATION - CATEGORY A SECONDARY CONTACT RECREATION COURTOIS CREEK (12 MILES IN CRAWFORD COUNTY ONLY) IS INCLUDED AS AN OUTSTANDING STATE RESOURCE WATER (10 CSR 20-7 TABLE (E)). FOR SEGMENT 1946 (INDIAN CREEK), THE LCS AT MEDIAN FLOW (60 PERCENT FLOW EXCEEDANCE), ARE 0.25 AND 8.9 POUNDS PER DAY (LBS/DAY) DISSOLVED LEAD AND DISSOLVED ZINC, RESPECTIVELY. FOR SEGMENT 3663 (TRIBUTARY TO INDIAN CREEK), THE LCS AT MEDIAN FLOW (60 PERCENT FLOW EXCEEDANCE), ARE 0.03 AND 0.89 LBS/DAY DISSOLVED LEAD AND DISSOLVED ZINC, RESPECTIVELY. FOR SEGMENT 1943 (COURTOIS CREEK), THE LCS AT MEDIAN FLOW (60 PERCENT FLOW EXCEEDANCE), ARE 1.69 AND 63.14 LBS/DAY DISSOLVED LEAD AND DISSOLVED ZINC, RESPECTIVELY. NUMERIC TARGET(S): THE APPLICABLE MISSOURI WQS FOR THE LEAD AND ZINC TMDLS IS: 10 CSR 20-7.031(4)(B)1 WATER CONT"

NPDES Allocation for Pollutant: Lead
NPDES ID Other Non PCS Identification Waste Load Allocation Units
MO0000086
0
 LBS/DAY
MO0055751
0
 LBS/DAY
MO0103420
0
 LBS/DAY
MOG490268
0
 LBS/DAY
MOR108711
0
 LBS/DAY
MOR22A227
0
 LBS/DAY


Listed Water Causes of Impairment for Lead
Click on the underlined Waterbody ID for a Waterbody Report. Click on the underlined "Waterbody Map" literal for a map of the Assessment Unit.
Waterbody ID Waterbody Name Map Cycles Listed Cause(s) of Impairment Addressed
MO-1943 COURTOIS CREEK Data Unavailable 2006, 2008, 2012 Metals (other than Mercury)
MO_1943 COURTOIS CREEK Waterbody Map 2006, 2008, 2012 Lead

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TMDL Pollutant: Zinc

Total Waste Load Allocation: 29.12      Total Load Allocation: 4.79
Explicit Margin Of Safety:      Implicit Margin Of Safety: Y
Units for Total Waste Load Allocation and Total Load Allocation: LBS/DAY      TMDL Pollutant Source Type: Point/Nonpoint Source
TMDL End Point: "WATER QUALITY STANDARDS ATTAINMENT: THE APPLICABLE MISSOURI WQS FOR THE LEAD AND ZINC TMDLS IS: 10 CSR 20-7.031(4)(B)1 WATER CONTAMINANTS SHALL NOT CAUSE THE CRITERIA IN TABLES A AND B TO BE EXCEEDED. CONCENTRATIONS OF THESE SUBSTANCES IN BOTTOM SEDIMENTS OR WATERS SHALL NOT HARM BENTHIC ORGANISMS AND SHALL NOT ACCUMULATE THROUGH THE FOOD CHAIN IN HARMFUL CONCENTRATIONS, NOR SHALL STATE AND FEDERAL MAXIMUM FISH TISSUE LEVELS FOR FISH CONSUMPTION BE EXCEEDED. CURRENT LEAD AND ZINC CRITERIA FOR THE PROTECTION OF AQUATIC LIFE USE ARE EXPRESSED IN DISSOLVED FORM IN UNITS OF MICROGRAMS PER LITER (UG/L). THESE CRITERIA ARE HARDNESS DEPENDENT AND CALCULATED FROM THE FORMULAS SHOWN BELOW FROM TABLE A OF 10 CSR 20-7.031: DISSOLVED LEAD ACUTE = E(1.273*LN(HARDNESS) -1.460448)*( 1.46203-(LN (HARDNESS)*0.145712)) = UG/L CHRONIC = E(1.273*LN(HARDNESS) - 4.704797)*( 1.46203-(IN (HARDNESS)*0.145712)) = UG/L DISSOLVED ZINC ACUTE = E(0.8473*LN(HARDNESS)+0.884211)* 0.978 = UG/L CHRONIC = E (0.8473*LN(HARDNESS) +0.785271)* 0.986 = UG/L WHERE ""E"" IS THE BASE OF THE NATURAL LOGARITHM (APPROXIMATELY 2.718) AND ""LN"" IS THE NATURAL LOGARITHM. THE APPLICABLE MISSOURI WQS FOR HARDNESS ARE: HARDNESS 50?74 75?99 100?124 125?149 150?174 175?199 200?224 225?249 250+ LEAD UG/L ACUTE 30 47 65 82 100 118 136 154 172 CHRONIC 1 2 3 3 4 5 5 6 7 ZINC UG/L ACUTE 65 92 117 142 165 188 211 233 255 CHRONIC 59 84 107 129 151 172 193 213 233 THE 25TH PERCENTILE HARDNESS VALUE MUST BE USED TO CALCULATE HARDNESS-DEPENDENT METALS CRITERIA (PER 10 CSR 20-7.031). 25TH PERCENTILE HARDNESS LEAD ZINC ACUTE CHRONIC ACUTE CHRONIC COURTOIS CREEK 170 MG/L 114 UG/L 4.5 UG/L 184 UG/L 168 UG/L INDIAN CREEK 225 MG/L 154 UG/L 6 UG/L 233 UG/L 213 UG/L TRIBUTARY TO INDIAN CREEK 154 UG/L 6 UG/L 233 UG/L 213 UG/L TRIBUTARY TO INDIAN CREEK RUNS FOR 0.3 MILES AND IS ENTIRELY CONTAINED WITHIN WASHINGTON COUNTY, AND IS CONTAINED WITHIN THE INDIAN CREEK WATERSHED. HARDNESS DATA FOR TRIBUTARY TO INDIAN CREEK WAS NOT AVAILABLE. THE INDIAN CREEK VALUES ARE REPRESENTATIVE OF THE ENTIRE INDIAN CREEK WATERSHED INCLUDING TRIBUTARY TO INDIAN CREEK. THE WATER QUALITY TARGETS FOR LEAD AND ZINC WILL BE BASED ON THE CHRONIC CRITERIA TO ENSURE AQUATIC LIFE WILL BE PROTECTED FROM ACUTE AND CHRONIC TOXICITY. TARGETS (BOLDED IN THE TABLE ABOVE) FOR COURTOIS CREEK ARE 4.5 UG/L FOR LEAD AND 168 UG/L FOR ZINC. TARGETS FOR INDIAN CREEK AND THE TRIBUTARY TO INDIAN CREEK ARE 6 UG/L FOR LEAD AND 213 UG/L FOR ZINC. THE BENEFICIAL USES FOR BOTH INDIAN CREEK (1946) AND TRIBUTARY TO INDIAN CREEK (3663) ARE: LIVESTOCK AND WILDLIFE WATERING PROTECTION OF WARM-WATER AQUATIC LIFE PROTECTION OF HUMAN HEALTH (FISH CONSUMPTION) WHOLE BODY CONTACT RECREATION - CATEGORY B THE BENEFICIAL USES FOR COURTOIS CREEK (1943) ARE: LIVESTOCK AND WILDLIFE WATERING PROTECTION OF COOL-WATER AQUATIC LIFE PROTECTION OF WARM-WATER AQUATIC LIFE PROTECTION OF HUMAN HEALTH (FISH CONSUMPTION) WHOLE BODY CONTACT RECREATION - CATEGORY A SECONDARY CONTACT RECREATION COURTOIS CREEK (12 MILES IN CRAWFORD COUNTY ONLY) IS INCLUDED AS AN OUTSTANDING STATE RESOURCE WATER (10 CSR 20-7 TABLE (E)). FOR SEGMENT 1946 (INDIAN CREEK), THE LCS AT MEDIAN FLOW (60 PERCENT FLOW EXCEEDANCE), ARE 0.25 AND 8.9 POUNDS PER DAY (LBS/DAY) DISSOLVED LEAD AND DISSOLVED ZINC, RESPECTIVELY. FOR SEGMENT 3663 (TRIBUTARY TO INDIAN CREEK), THE LCS AT MEDIAN FLOW (60 PERCENT FLOW EXCEEDANCE), ARE 0.03 AND 0.89 LBS/DAY DISSOLVED LEAD AND DISSOLVED ZINC, RESPECTIVELY. FOR SEGMENT 1943 (COURTOIS CREEK), THE LCS AT MEDIAN FLOW (60 PERCENT FLOW EXCEEDANCE), ARE 1.69 AND 63.14 LBS/DAY DISSOLVED LEAD AND DISSOLVED ZINC, RESPECTIVELY. NUMERIC TARGET(S): THE APPLICABLE MISSOURI WQS FOR THE LEAD AND ZINC TMDLS IS: 10 CSR 20-7.031(4)(B)1 WATER CONT"

NPDES Allocation for Pollutant: Zinc
NPDES ID Other Non PCS Identification Waste Load Allocation Units
MO0000086
0
 LBS/DAY
MO0055751
0
 LBS/DAY
MO0103420
0
 LBS/DAY
MOG490268
0
 LBS/DAY
MOR108711
0
 LBS/DAY
MOR22A227
0
 LBS/DAY


Listed Water Causes of Impairment for Zinc
Click on the underlined Waterbody ID for a Waterbody Report. Click on the underlined "Waterbody Map" literal for a map of the Assessment Unit.
Waterbody ID Waterbody Name Map Cycles Listed Cause(s) of Impairment Addressed
MO-1943 COURTOIS CREEK Data Unavailable 2006, 2008, 2012 Metals (other than Mercury)
MO_1943 COURTOIS CREEK Waterbody Map 2006, 2008, 2012 Zinc

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