40 CFR Part 136, Appendix D to Part 136 - Precision and Recovery Statements for Methods for Measuring Metals

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View PDF at GPO Pt. 136, App. D
Appendix D to Part 136—Precision and Recovery Statements for Methods for Measuring Metals
Two selected methods from “Methods for Chemical Analysis of Water and Wastes,” EPA-600/4-79-020 (1979) have been subjected to interlaboratory method validation studies. The two selected methods are for Thallium and Zinc. The following precision and recovery statements are presented in this appendix and incorporated into Part 136:
Method279.2
For Thallium, Method 279.2 (Atomic Absorption, Furnace Technique) replace the Precision and Accuracy Section statement with the following:
Precision and Accuracy
An interlaboratory study on metal analyses by this method was conducted by the Quality Assurance Branch (QAB) of the Environmental Monitoring Systems Laboratory—Cincinnati (EMSL-CI). Synthetic concentrates containing various levels of this element were added to reagent water, surface water, drinking water and three effluents. These samples were digested by the total digestion procedure, 4.1.3 in this manual. Results for the reagent water are given below. Results for other water types and study details are found in “EPA Method Study 31, Trace Metals by Atomic Absorption (Furnace Techniques),” National Technical Information Service, 5285 Port Royal Road, Springfield, VA 22161 Order No. PB 86-121 704/AS, by Copeland, F.R. and Maney, J.P., January 1986.
For a concentration range of 10.00-252 µg/L
X = 0.8781(C) − 0.715
S = 0.1112(X) 0.669
SR = 0.1005(X) 0.241
Where:
C = True Value for the Concentration, µg/L
X = Mean Recovery, µg/L
S = Multi-laboratory Standard Deviation, µg/L
SR = Single-analyst Standard Deviation, µg/L
Method289.2
For Zinc, Method 289.2 (Atomic Absorption, Furnace Technique) replace the Precision and Accuracy Section statement with the following:
Precision and Accuracy
An interlaboratory study on metal analyses by this method was conducted by the Quality Assurance Branch (QAB) of the Environmental Monitoring Systems Laboratory—Cincinnati (EMSL-CI). Synthetic concentrates containing various levels of this element were added to reagent water, surface water, drinking water and three effluents. These samples were digested by the total digestion procedure, 4.1.3 in this manual. Results for the reagent water are given below. Results for other water types and study details are found in “EPA Method Study 31, Trace Metals by Atomic Absorption (Furnace Techniques),” National Technical Information Service, 5285 Port Royal Road, Springfield, VA 22161 Order No. PB 86-121 704/AS, by Copeland, F.R. and Maney, J.P., January 1986.
For a concentration range of 0.51-189 µg/L
X = 1.6710(C) 1.485
S = 0.6740(X) − 0.342
SR = 0.3895(X)− 0.384
Where:
C = True Value for the Concentration, µg/L
X = Mean Recovery, µg/L
S = Multi-laboratory Standard Deviation, µg/L
SR = Single-analyst Standard Deviation, µg/L
[77 FR 29833, May 18, 2012]

Title 40 published on 2014-07-01

The following are only the Rules published in the Federal Register after the published date of Title 40.

For a complete list of all Rules, Proposed Rules, and Notices view the Rulemaking tab.

  • 2014-08-19; vol. 79 # 160 - Tuesday, August 19, 2014
    1. 79 FR 49001 - National Pollutant Discharge Elimination System (NPDES): Use of Sufficiently Sensitive Test Methods for Permit Applications and Reporting
      GPO FDSys XML | Text
      ENVIRONMENTAL PROTECTION AGENCY
      Final rule.
      These final regulations are effective September 18, 2014. For judicial review purposes, this final rule is promulgated as of 1:00 p.m. Eastern Time, on September 2, 2014, as provided in 40 CFR 23.2.
      40 CFR Parts 122 and 136

Title 40 published on 2014-07-01

The following are ALL rules, proposed rules, and notices (chronologically) published in the Federal Register relating to 40 CFR 136 after this date.

  • 2014-08-19; vol. 79 # 160 - Tuesday, August 19, 2014
    1. 79 FR 49001 - National Pollutant Discharge Elimination System (NPDES): Use of Sufficiently Sensitive Test Methods for Permit Applications and Reporting
      GPO FDSys XML | Text
      ENVIRONMENTAL PROTECTION AGENCY
      Final rule.
      These final regulations are effective September 18, 2014. For judicial review purposes, this final rule is promulgated as of 1:00 p.m. Eastern Time, on September 2, 2014, as provided in 40 CFR 23.2.
      40 CFR Parts 122 and 136