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NPDES Monitoring Requirement 10 September 2001
<br /> Attachment D-2 -Dioxin and Furan Sampling
<br /> Section 3 of the State Implementation Plan requires that each NPDES discharger conduct
<br /> sampling and analysis of dioxin and dibenzofuran congeners. The required number and
<br /> frequency of sampling are as follows:
<br /> o Major NPDES Dischargers—once during dry weather and once during wet weather
<br /> for each of three years, for a total of six samples.
<br /> o Minor NPDES Dischargers—once during dry weather and once during wet weather
<br /> for one year during the three-year period, for a total of two samples.
<br /> Each sample shall be analyzed for the seventeen congeners listed in the table below.
<br /> High Resolution GCMS Method 8290, or another method capable of individually
<br /> quantifying the congeners to an equivalent detection level, shall be used for the analyses.
<br /> Sampling shall start during winter 2001/2002 and all analyses shall be completed and
<br /> submitted by 1 November 2004. Sample results shall be submitted along with routine
<br /> monitoring reports as soon as the laboratory results are available.
<br /> For each sample the discharger shall report:
<br /> o The measured or estimated concentration of each of the seventeen congeners
<br /> o The quantifiable limit of the test(as determined by procedures in Section 2.4.3, No. 5
<br /> of the SII')
<br /> o The Method Detection Level (MDL) for the test
<br /> o The TCDD equivalent concentration for each analysis calculated by multip`; 'ina tlic
<br /> concentration of each congener by the Toxicity Equivalency Factor(TEF) in the
<br /> following table, and summing the resultant products to determine the equivalefir
<br /> toxicity of the sample expressed as 2,3,7,8-TCDD.
<br /> Congener TEF
<br /> 2,3,7,8TetraCDD 1
<br /> 1,2,3,7,8-PentaCDD 1.0
<br /> 1,2,3,4,7,8-HexaCDD 0.1
<br /> 1,2,3,6,7,8-HexaCDD 0.1
<br /> 1,2,3,7,8,9-HexaCDD 0.1
<br /> 1,2,3,4,6,7,8-He taCDD 0.01 1
<br /> OctaCDD 0.0001
<br /> 2,3,7,8-TetraCDF 0.1
<br /> 1,2,3,7,8-PentaCDF 0.05
<br /> 2,3,4,7,8-PentaCDF 0.5
<br /> 1,2,3,4,7,8-HexaCDF 0.1
<br /> 1,2,3,6,7,8-HexaCDF 0.1
<br /> 1,2,3,7,8,9-HexaCDF 0.1
<br /> 2,3,4,6,7,8-HexaCDF 0.1
<br /> 1,2,3,4,6,7,8-He taCDF 0.01
<br /> 1,2,3,4,7,8,9-HeptaCDF 0.01
<br /> OctaCDF 0.0001
<br /> 1oft
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