Memorandum From: Lynn Zipf USEPA/ OW/ OST ph: ( 202) 566 1429 zipf. lynn@ epa. gov Jan Matuszko USEPA/ OW/ OST ph: ( 202) 566 1035 matuszko. jan@ epa. gov To: 304( m) Record ( EPA Docket Number OW 2003 0074)

Date: August 10, 2004 Re: : Revisions to TWFs for Dioxin and its Congeners and Recalculated TWPEs for OCPSF and Petroleum Refining In a memorandum dated December 3, 2003 ( Zipf, 2003), EPA described revisions it intends to make in its Toxic Weighting Factor ( TWFs) methodology. Revised TWFs were not available, however, in time to use them broadly in EPA's 2004 annual review of promulgated effluent guidelines and industrial activities not regulated by existing guidelines. EPA completed the revision of TWFs for dioxin and its congeners as described in this memorandum in July, 2004. These revisions and the resulting TWFs are presented in this memorandum. The revised TWFs were used to recalculate the toxicity weighted dioxin discharges for two categories for which EPA conducted detailed reviews. The recalculated toxic weighted pound equivalents ( TWPE) for these two categories, Organic Chemicals, Plastics, and Synthetic Fibers ( OCPSF, including chloralkali chlorine manufacture) and Petroleum Refining, are also presented in this memorandum.

Revisions to TWFs for Dioxin and its Congeners EAD has updated the TWFs for dioxin and its congeners to be consistent with EPA's methodologies and policies. As noted in the memorandum to the record dated August 18, 2004 ( Zipf, 2004) EPA retained the use of the 1985 slope factor for 2,3,7,8 tetrachlorodibenzo pdioxin but revised the slope factors for other congeners using the 1998 World Health Organization Toxic Equivalency Factors ( Van den Berg, et al., 1998). As discussed below, EPA has further revised the TWFs for dioxin and its congeners to incorporate congener specific Bioaccumulation Factors ( BAFs) as well as incorporating the updated fish consumption intake rate in the 2000 Methodology for Deriving Human Health Criteria ( U. S. EPA, 2000).

Revisions to Bioaccumulation Factors The BAFs in Table 10 of Great Lakes Water Quality Initiative Technical Support Document for the Procedure to Determine Bioaccumulation Factors ( U. S. EPA, 1995) are lipid normalized and Page 2 freely dissolved based BAFs, also known as " Baseline BAFs." These baseline BAFs were developed as described in EPA's Methodology for Deriving Ambient Water Quality Criteria for the Protection of Human Health Technical Support Document Volume 2: Development of National Bioaccumulation Factors ( EPA 2003). This process of lipid normalization and freely dissolved adjustment essentially ' convert' the " site specific" BAFs that were derived from Salmonids in the Great Lakes that have specific lipid content and organic carbon content, into values that are ready to extrapolate to other conditions, i. e. a national BAF. To do this, the lipid and freely dissolved parts need to be re adjusted to " national" values.

The first step is to convert the BAFs from the GLWQI Bioaccumulation TSD to " Baseline BAFs" using the national defaults for f

( fraction lipid) and f fd ( fraction dissolved) using the following equation:

National BAF TL n = [( Final Baseline BAF) TL * ( f

) TL n + 1] * f fd where:

Final Baseline BAF TL n = mean baseline BAF for trophic level " n" ( f

) TL n = fraction of tissue that is lipid in aquatic organisms at trophic level " n"

f fd = fraction of the total concentration of chemical in water that is freely dissolved The national default trophic level specific lipid fractions ( f

) TL n [ where f

= fraction lipid at trophic level ( TL) " n"] are the following:

Trophic Level National Default Values ( percentage)

2 1.9%

3 2.6%

4 3.0%

These national default lipid values can found in EPA 2003.

The f fd ( fraction freely dissolved) is calculated as follows:

f fd = 1 1 + POC * K ow + DOC * 0.08 * K ow Page 3 where:

f fd = fraction of the total concentration of chemical in water that is freely dissolved POC = concentration of particulate organic carbon in water ( kilograms of particulate organic carbon per liter of water)

DOC = concentration of dissolved organic carbon in water ( kilograms of dissolved organic carbon per liter of water)

K ow = n octanol water partition coefficient The national default values for POC and DOC are 0.5 mg/ L and 2.9 mg/ L respectively. The derivation of these values is explained in Section 6.3 of EPA 2003.

For example, the BAF from Table 10 in EPA, 1995 for 2,3,7,8 TCDD is 9.00e+ 06 for Trophic Level 4 ( salmonids); and the log K ow is 7.02. Given these two parameters, we are able to calculate the National BAF for a given trophic level.

The first step would be to calculate the fraction of the total concentration of 2,3,7,8 TCDD which is freely dissolved:

f fd = 1 1 + POC * K ow + DOC * 0.08 * K ow where: POC = 5.0 x10 7 kg/ L ( national default values) DOC = 2.9 x 10 6 kg/ L ( national default values)

Log K ow = 7.02 Kow = 107.02 = 10,471,285 so: f fd = 1 1 + 5.0 x10 7 kg/ L * 1.05e+ 07 + 2.9 x 10 6 kg/ L * 0.08 * 1.05e+ 07 f fd = 0.11541 The next steps is to insert this value for the freely dissolved fraction of 2,3,7,8 TCDD into the following equation:

National BAF TL n = [( Final Baseline BAF) TL * ( f

) TL n + 1] * f fd where: Page 4 HHOO ( µ g/ L)

70 kg x Risk Level ( dimensionless) x 1,000 µ g/ mg SF ( mg/ kg/ d)

1 x 0.0175 kg/ d x BAF ( L/ kg)

HHOO ( µ g/ L)

70 kg x 10  5 x 1,000 µ g/ mg 160,000 ( mg/ kg/ d)

1 x 0.0175 kg/ d x 31160.02 ( L/ kg)

HHOO ( µ g/ L)

8.02e  09 TWF

5.6 AQ  5.6 HHOO Final Baseline BAF TL n = 9.00e+ 06 ( Trophic Level 4) ( f

) TL n = for trophic level 4, .03 ( from Table of national default values)

f fd = 0.11541 so: National BAF TL 4 = [( 9.00 e+ 06) 4 * (. 03) 4 + 1] * 0.11541 National BAF TL 4 = 31160.02 To incorporate this revised BAF into the TWF methodology, you would use the following equation:

where:

HHOO = human health ( ingesting organisms only) value 70 kg = weight of person Risk Level = 10 5 SF = slope factor BAF = bioaccumulation factor 0.0175 kg/ d = fish consumption rate This equation incorporates the updated fish consumption number as well as the use of the BAF instead of the BCF. Both of these revisions have been used in the development of the 2000 Methodology for Deriving Human Health Criteria ( EPA 2000).

The toxic weighting factor would be calculated using the following equation: Page 5 TWF

5.6 0.000001  5.6 8.02e  09 TWF

7.04e  08 It should be noted, though, that this procedure does not follow the recommendations in EPA, 2000 precisely because Baseline BAFs for 2,3,7,8 TCDD are not available for trophic level 2 & 3. Therefore, all of the 17.5 grams/ day fish consumption was apportioned to trophic level 4 only. Two approaches were considered for deriving the overall BAF. One approach would apportion the 17.5 grams of fish eaten per day among trophic levels 4, 3, and 2 as described in the 2000 Methodology for Deriving Human Health Criteria ( EPA, 2000). Data on U. S. consumers of fish and shellfish indicate significant consumption of organisms in these trophic levels. The second approach would apportion all fish intake to trophic level 4. EPA selected the latter approach based on the availability of data recognizing that either of the approaches is suitable for this screening level analysis. EPA notes there was little difference between the values derived using either approach.

The results of these recalculations are presented in Table 1 at the end of this memorandum.

Recalculation of TWPEs for OCPSF and Petroleum Refining Section 4.2 of Technical Support Document for the 2004 Effluent Guidelines Program Plan ( EPA, 2004) describes how EPA estimated pollutant loadings, including its use of TWFs to estimate TWPEs. Section <IP_ADDRESS> describes how TWPEs were calculated for dioxins and dioxin like compounds. The TWFs presented in TSD Table 4 2 were used to estimate the dioxin TWPEs presented in Sections 5, 6, and 7 of the TSD. These dioxin TWPEs were used in EPA's 2004 annual review of promulgated effluent guidelines.

After EPA revised the TWFs for dioxin and its congeners, EPA recalculated the TWPEs for the OCPSF and Petroleum Refining Categories and recreated the tables included in the TSD using the recalculated TWPES. These revised tables are attached to this memorandum. Attachment A contains the tables for OCPSF and Attachment B contains the tables for Petroleum Refining.

These updated TWPE estimates do not change EPA's earlier conclusions regarding revision of OCPSF and Petroleum Refining effluent limitations guidelines and standards.

For OCPSF, the recalculated TWPE continue to demonstrate that dioxin discharges from the vinyl chloride and chlor alkali manufacturing sectors are significant.

For petroleum refining, while these tables reflect increased dioxin TWPE estimates, the issue Page 6 remains that for refineries, TWPE estimates are based on dioxin concentrations close to the analytical minimum level. Further, the highest estimated TWPE was calculated for an effluent sampled only once, with all detected congener concentrations below the Method 1613b minimum level. See Section 7 of the TSD ( EPA, 2004) for additional discussion.

Recalculation of Dioxin TWPEs for Other Categories EPA notes that because of time constraints, it only recalculated dioxin TWPEs for the OCPSF and Petroleum Refining categories. In future planning cycles, EPA will use its revised TWFs to calculate all dioxin TWPEs.

Revisions to TWFs for Other Pollutants In its December 3, 2003 memorandum ( Zipf, 2003), EPA described revisions it intends to make in its TWFs methodology. This memo proposes the same revisions for all chemicals that are put forth here for dioxin and its congeners. The methodological revisions detailed in the December 3, 2003 memorandum will be completed for as many chemicals as possible in the next planning cycle.

References:

U. S. EPA, 1995. Great Lakes Water Quality Initiative Technical Support Document for the Procedure to Determine Bioaccumulation Factors . EPA 820 B 95 005.

U. S. EPA, 2000. Methodology for Deriving Human Health Criteria. EPA 822 B 00 004.

U. S. EPA, 2003. Methodology for Deriving Ambient Water Quality Criteria for the Protection of Human Health Technical Support Document, Volume 2: Development of National Bioaccumulation Factors. EPA 822 R 03 030. Office of Water, Washington, D. C.

U. S. EPA, 2004. Technical Support Document for the 2004 Effluent Guidelines Program Plan.

Van den Berg, et al., 1998. Toxic Equivalence Factors ( TEFs) for PCBs, PCDDs, PCDFs for Humans and Wildlife, Environ. Health Perspect. 106: 775 792.

Zipf, Lynn. 2003. Memorandum: Revisions to EAD's Toxic Weighting Factor Methodology. December 3, 2003. EPA Docket Number OW 2003 0074. ( DCN 708)

Zipf, Lynn 2004. Memorandum: Slope Factors for Dioxin Congeners. August 18, 2004. EPA Docket Number OW 2003 0074. Page 7 Table 1 Comparison of Toxic Weighting Factors for Dioxin and its Congeners kg* ug/ mg Slope Factor Value ( mg/ kg d) 1 Old FI * BCF ( L/ d) Updated FI * BAF ( L/ d) % Change Old HHOO New HHOO % Change Freshwater Aquatic Life Chronic Old TWF New TWF % Change 2,3,7,8 TCDD 0.7 160,000 325 545.30 67.8 1.35e 08 8.02e 09  40.4 0.000001 421,600,000 703,584,499 66.9 1,2,3,7,8 PCDD 0.7 160,000 325 541.35 66.6 1.35e 08 8.08e 09  40.0 0 416,000,000 692,931,538 66.6 1,2,3,4,7,8 HxCDD 0.7 16,000 325 183.58  43.5 1.35e 07 2.38e 07 77.0 41,600,000 23,498,504  43.5 1,2,3,6,7,8 HxCDD 0.7 16,000 325 74.66  77.0 1.35e 07 5.86e 07 335.3 41,600,000 9,556,087  77.0 1,2,3,7,8,9 HxCDD 0.7 16,000 325 82.78  74.5 1.35e 07 5.29e 07 292.6 41,600,000 10,595,715  74.5 1,2,3,4,6,7,8 HpCDD 0.7 1,600 325 32.12  90.1 1.35e 06 1.36e 05 911.7 4,160,000 411,193  90.1 OCDD 0.7 16 325 7.70  97.6 1.35e 04 5.68e 03 4119.5 0.001 47,200 6,586  86.0 2,3,7,8 TCDF 0.7 16,000 325 342.11 5.3 8.41e 07 1.28e 07  84.8 0.00019 6,688,213 43,819,385 555.2 1,2,3,7,8 PCDF 0.7 8,000 325 119.26  63.3 1.70e 06 7.34e 07  56.8 3,294,118 7,632,827 131.7 2,3,4,7,8 PCDF 0.7 80,000 325 870.80 167.9 1.70e 07 1.00e 08  94.1 32,941,176 557,309,038 1591.8 1,2,3,4,7,8 HxCDF 0.7 16,000 325 45.00  86.2 8.41e 07 9.72e 07 15.6 6,658,740 5,760,600  13.5 1,2,3,6,7,8 HxCDF 0.7 16,000 325 110.23  66.1 8.41e 07 3.97e 07  52.8 6,658,740 14,109,162 111.9 1,2,3,7,8,9 HxCDF 0.7 16,000 325 369.60 13.7 8.41e 07 1.18e 07  85.9 6,658,740 47,308,608 610.5 2,3,4,6,7,8 HxCDF 0.7 16,000 325 400.04 23.1 8.41e 07 1.09e 07  87.0 6,658,740 51,204,604 669.0 1,2,3,4,6,7,8 HpCDF 0.7 1,600 325 6.70  97.9 8.41e 06 6.53e 05 676.4 665,874 85,769  87.1 1,2,3,4,7,8,9 HpCDF 0.7 1,600 325 237.03  27.1 8.41e 06 1.85e 06  78.1 665,874 3,033,965 355.6 OCDF 0.7 16 325 10.32  96.8 8.41e 04 4.24e 03 404.0 0.008 7,359 2,021  72.5 Attachment A OCPSF Tables TWPEs Recalculated using Revised TWFs for Dioxin and Its Congners A  1 Table 3 8 ( revised). OCPSF Pollutant Load Discharged to Surface Water in 2000 by SIC Code1 ( TWPE calculated with 7/ 27/ 04 dioxin TWFs)

SIC Code SIC Code Name TRI PCS Pounds TWPE Pounds TWPE 2821 Plastic Materials and Synthetic Resins 5,000,000 530,289 252,000,000 489,000 2823 Cellulosic Man Made Fibers 438,000 29,200 499,000,000 60,700 2824 Other Synthetic Organic Fibers 1,740,000 2,420 13,100,000 3,290 2865 Cyclics, Dyes, and Pigments 2,470,000 950,000 54,100,000 324,000 2869 Organic Chemicals, Not Elsewhere Classified 44,400,000 30,229,898 1,590,000,000 1,280,000 Total Reported TWPE for OCPSF Category 54,000,000 31,700,000 2,410,000,000 2,110,000 Sources: PCSLoads2000 and TRI2000 databases. Notes: Numbers updated from SIC code totals from the proposed Notice, 12/ 31/ 03, because of data corrections described in Section 2.0 of this chapter. 1The pollutant load discharged to surface water was estimated by TRI Releases 2000 using pollutant releases to directly to surface water and transfers to publicly owned treatment works ( POTWs), taking POTW removals into account.

Table 3 11 ( revised). Top Pollutants Reported Discharged in 2000 for the OCPSF Category ( TWPE calculated with 7/ 27/ 04 dioxin TWFs)

Pollutant Reported Data Source Pounds Reported TWPE Reported Dioxin and dioxin like compounds TRI 3.27 ( 1,480 grams) 30.3 million Polycyclic aromatic compounds TRI 2,020 941,000 Aniline TRI 85,600 120,400 A  2 Table 8 3 ( revised). Pollutants of Concern for Stand Alone Chlor Alkali Manufacturers1 ( TWPE calculated with 7/ 27/ 04 dioxin TWFs)

Pollutant lb/ yr TWPE % of Total TWPE for Source Source # Facilities Reporting Pollutant Median per Facility Load TRI Pollutants Dioxin and dioxinlike compounds 0.0086 509,828 98 TRI 3 0.0019 Mercury 69 8,078 1.5 TRI 5 12 Chlorine 3,578 1,742 0.3 TRI 2 1,789 Sodium nitrite 3,000 1,120 0.2 TRI 1 NA PCS Pollutants Sulfide, Total as S 21,944 61,456 53 PCS 1 NA Total residual chlorine 46,043 22,422 19 PCS 10 328 Mercury, Total as Hg 165 19,314 17 PCS 8 20 Chloride 166,221,615 4,047 4 PCS 3 39,583,393 Benzo( a) pyrene 0.90 3,855 3 PCS 1 NA Copper, Total as Cu 3,705 2,322 2 PCS 7 76 Sources: PCSLoads2000 and TRIReleases2000 Databases. 1May manufacture additional chemicals, but do not manufacture EDC, VCM, or PVC. A  3 Table 8 4 ( revised). Pollutants of Concern for Stand Alone EDC/ VCM Manufacturers ( No Chlor Alkali) ( TWPE calculated with 7/ 27/ 04 dioxin TWFs)

Pollutant lb/ yr TWPE % of Total TWPE for Source Source # Facilities Reporting Pollutant (% with PVC Operations) Median per Facility Load ( Annual lbs/ facility)

TRI Pollutants Dioxin and dioxinlike compounds 0.0013 9,360 97 TRI 1 NA Chlorine 347 169 2 TRI 1 NA PCS Pollutants Copper, Total as Cu 51 32 71 PCS 1 NA Chromium, Total as Cr 102 8 17 PCS 1 NA Zinc, Total as Zn 108 5 11 PCS 1 NA Sources: PCSLoads2000 and TRIReleases2000 Databases. A  4 Table 8 5 ( revised). Pollutants of Concern for Integrated Chlor Alkali and Vinyl Facilities ( Manufacturers of Chlor Alkali and EDC/ VCM, May Also Produce PVC) ( TWPE calculated with 7/ 27/ 04 dioxin TWFs)

Pollutant lb/ yr TWPE % of Total TWPE for Source Source # Facilities Reporting Pollutant (% with PVC Operations) Median per Facility Load ( Annual lbs/ facility)

TRI Pollutants Dioxin and dioxinlike compounds 3.24 29,562,274 > 99 TRI 9 0.005 Hexachlorobenzene 41 29,691 0.10 TRI 3 18 Chlorine 9,399 4,577 0.02 TRI 6 568 Copper compounds 3,345 2,097 0.01 TRI 4 163 PCS Pollutants Total residual chlorine 43,608 21,237 46 PCS 9 723 Vinyl chloride 49,982 5,793 13 PCS 1 NA Chromium, hexavalent 10,614 5,433 12 PCS 1 NA Copper, total as Cu 5,060 3,172 7 PCS 11 228 Phenolics, total recoverable 82,460 2,309 5 PCS 1 NA Mercury, total recoverable 12.2 1,425 3 PCS 1 NA Mercury, total as Hg 11.7 1,368 3 PCS 3 1.9 Lead, total as Pb 582 1,303 3 PCS 4 81 Chloride 46,191,7 50 1,125 2 PCS 1 NA Sources: PCSLoads2000 and TRIReleases2000 Databases. A  5 Table 8 7 ( revised). Dioxin Releases Reported by OCPSF Facilities to TRI for 2000 and 2001 ( TWPE calculated with 7/ 27/ 04 dioxin TWFs)

Site Name Location Discharge Status 2000 2001 2000 Basis for Estimate g TM17 TWPE ( lb eq) g TM17 TWPE ( lb eq)

Atofina Petrochemicals La Porte, TX Direct 0.079 1,847 0 0 O Celanese Acetate Narrows, VA Direct 0.014 941 0 0 C, M, O Condea Vista Baltimore, MD Direct 0.010 1.93 0 0 M, O Indirect 0.0034 0.66 0 0 M, O Cytec Industries Wallingford, CT Direct 3.00 448,66 4 1.00 149,582 M, O Dow Freeport, TX Direct 562.12 297,39 3 708 6,862 M, O Midland, MI Direct 5.69 5,443, 311 2 49,465 C, M, O Plaquemine, LA Direct 745.86 4,521, 356 512 2,685,7 90 M, O DuPont Chamber Works Deepwater, NJ Direct 0.20 63 0 0 M, O Formosa Plastics Point Comfort, TX Direct 0.61 6,948 0 0 M Baton Rouge, LA Direct 0.0018 30 0 0 M, O Geismar Vinyls ( Borden) Geismar, LA Direct 0.61 9,360 0 0 C, M, O Georgia Gulf Plaquemine, LA Direct 82.78 4,485, 615 0 0 M, O Occidental Chemical Convent, LA Direct 0.80 107,12 5 0 0 O, M Occidental Chemical Corp Ingleside, TX Direct 1.60 7,668 1 5,801 M Hahnville, LA Direct 0.86 31,952 14 2,441,1 81 M, O Niagara Falls, NY Direct 0.24 1,202 0 0 M, O Indirect 0.00054 2.71 0 0 M, O Oxy Vinyls La Porte VCM Plant La Porte, TX Direct 2.33 251,78 8 1 108,083 M, O PPG Industries, Inc. Lake Charles, LA Direct 74.79 14,738 ,433 42 7,600,9 26 M, O Table 8 7 ( revised) Continued Site Name Location Discharge Status 2000 2001 2000 Basis for Estimate g TM17 TWPE ( lb eq) g TM17 TWPE ( lb eq)

A  6 Natrium, WV Direct 2.81 476,67 1 2 339,716 M Sasol North America, Inc. Westlake, LA Direct 0.20 8,592 0 0 E, M, O Velsicol Chemical Corp Memphis, TN Indirect 4.14 65,590 5 73,472 DNR Source: TRIReleases2000 database, 2001 National TRI Data. Notes: DNR indicates that the facility did not respond to this question in the 2000 TRI. M   Estimate is based on monitoring data or measurements. C   Estimate is based on mass balance calculations, such as calculation of the amount of wastes entering and leaving process equipment. E   Estimate is based on published emission factors, such as those relating release quantity to through put or equipment type ( e. g., air emission factors). O   Estimate is based on other approaches such as engineering calculations ( e. g., estimating volatilization using published mathematical formulas) or best engineering judgment. This would include applying an estimated removal efficiency to a treatment, even if the composition of the waste before treatment was fully identified through monitoring data.

Table 8 8 ( revised). Dioxin Loads Reported by OCPSF Facilities to PCS for 2000 ( TWPE calculated with 7/ 27/ 04 dioxin TWFs)

Facility Parameter lbs/ yr PCS TWPE Formosa Plastics Corporation, La Porte, TX 2,3,7,8 TCDD ND ND Dow Chemical Midland, TX 2,3,7,8 TCDD ND ND Oxychem Lake Charles Plant 2,3,7,8 TCDD ND ND Dover Chemical Corporation 2,3,7,8 TCDD ND ND Chlorinated Dibenzo p dioxins, Effluent 0.00011 2,355 Source: PCSLoads2000 database. ND  not detected. A  7 Table 8 10 ( revised). CCC Data for Dioxin Discharges from Facilities Manufacturing Chlorine or Chlorine Related Products for 2000 ( TWPE calculated with 7/ 27/ 04 dioxin TWFs)

Company Facility Location Dioxin Water Release ( g TEQ) TWPE ( lb eq)

Dow Plaquemine, LA 7.71 11,948,539 Dow Freeport, TX 6.91 10,708,742 Dow Midland, MI 0.037 57,341 Formosa Plastics Delaware City, DE 0 0 Formosa Plastics Point Comfort, TX 0 0 Formosa Plastics Corp Louisiana Baton Rouge, LA 0 0 Geismar Vinyls Geismar, LA 0 0 Georgia Gulf Plaquemine, LA 0.023 35,644 Georgia Gulf Lake Charles LLC Westlake, LA 0 0 Occidental Chemical Convent, LA 0.00204 3,161 Occidental Chemical Company Delaware City, DE 0.00013 201 Occidental Chemical Corp and Oxymar Ingleside, TX 0.181 280,504 Occidental Chemical Corporation Hahnville, LA 1.08 1,673,725 Occidental Chemical Corporation Mobile, AL 0.000036 56 Occidental Chemical Corporation Niagara Falls, NY 0.01 15,497 Oxy Vinyls Deer Park Chlor alkali Plant Deer Park, TX 5.400E 01 836,863 Oxychem Muscle Shoals, AL 8.65E 08 0.134 Oxychem Castle Hayne, NC 0 0 OxyChem Grand Island, NY1 0 0 OxyVinyls Battleground Chlor alkali Plant LaPorte, TX 4.830E 0 749 Oxyvinyls Deer Park VCM Deer Park, TX 0.0308 47,732 Oxyvinyls La Porte VCM Plant La Porte, TX 0.00643 9,965 PPG Lake Charles, LA 8.98 13,916,715 PPG Industries, Inc. Natrium/ New Martinsville, WV 0.193 299,101 Vulcan Chemical Geismar, LA 0 0 Wichita, KS 0 0 Sources: CCC web page, Individual CCC reports. 1The Oxychem Grand Island facility is not included in the OCPSF Dioxin Discharging Group because it is a R& D A  8 center. The facility was closed in December 2001. A  9 Table 8 11 ( revised). Dioxin Congeners Detected in Raw Wastewater from EDC/ VCM Operations1 ( TWPE calculated with 7/ 27/ 04 dioxin TWFs)

Dioxin Congener Detected Maximum Concentration2 ( ng/ L) TEF 1,2,3,4,6,7,8 HpCDD 880 0.01 1,2,3,4,6,7,8 HpCDF 43,000 0.01 1,2,3,4,7,8,9 HpCDF 12,000 0.01 1,2,3,4,7,8 HxCDD 52 0.1 1,2,3,6,7,8 HxCDD 91 0.1 1,2,3,7,8,9 HxCDD 110 0.1 1,2,3,4,7,8 HxCDF 5,300 0.1 1,2,3,6,7,8 HxCDF 1,200 0.1 1,2,3,7,8,9 HxCDF 1,200 0.1 2,3,4,6,7,8 HxCDF 430 0.1 2,3,4,7,8 PeCDF 230 0.5 2,3,7,8 TCDD 17 1 2,3,7,8 TCDF 82 0.1 Toxic Equivalency of Mixture ( ng TEQ/ L) 1,537.00 TWPE of Mixture ( TWPE/ L) 0.69 Notes: 1Source: Best Demonstrated Available Technology ( BDAT) Background Document for Chlorinated Aliphatics Production Wastes  K173, K174, K175, EPA OSW, July 1999. 2Maximum concentration detected in wastewater from six facilities. EPA OSW sampled the influent to biological treatment from chlorinated aliphatics manufacturers, all of which manufacture EDC/ VCM in addition to other chlorinated aliphatics. The samples were analyzed using EPA Method 1613. A  10 Table 8 12 ( revised). Focus Group 3 Industry Analytical Data on Dioxin in Wastewater ( TWPE calculated with 7/ 27/ 04 dioxin TWFs)

Type of Wastewater Number of Facilities with Data Concentration, pg TEQ/ L Minimum TWPE/ MGal2 Range of Flows, MGD1 Range Median Range Media n Raw Wastewater Chlorine Gas Condensates, Prior to Wastewater Treatment 9 238  35,674 6,198 1,089  188,827 25,794 0.008  0.217 EDC Quench Water, Prior to Wastewater Treatment 2 10,231  18,537 14,384 3,305  31,390 17,348 0  0.194 Treated Effluent Wastewater Treated Process Wastewater Effluent, Including Chlor Alkali Wastewater Only 7 0.508  535 66.5 0.91  3,075 241 1.49  17.2 Treated Process Wastewater Effluent, Including Chlor Alkali, EDC, VCM, and Other Organics Operations 2 0.000104  110 55.2 0.0000023  636 318 11.6 Treated Process Wastewater Effluent Including EDC, VCM, and Other Organic Operations 6 3.12  174 34.3 2.11  658 92 0.77  39.4 Treated Process Wastewater Effluent, Including PVC Operations Only 1 0.333 NA 0.26 NA NA Source: Industry Responses to EPA Data Request June 2004. Notes: 1Flows from four facilities were excluded from flow ranges to protect confidential business information. Also, some facilities providing flow data did not provide analytical data, and visa versa. 2To calculate TWPE, for concentrations below detection limits, EPA assumed the value to be zero. This represents the minimum TWPE based on industry data. A  11 Table 8 13 ( revised). Wastewater Dioxin Discharges from Focus Group 3 Based On Industry Data ( TWPE calculated with 7/ 27/ 04 dioxin TWFs)

Product Type Number of Facilities with Data Total Annual Dioxin Discharge grams TEQ TWPE1 Stand Alone Manufacturers of Chlor Alkali 2 1.76 2.6 million Stand Alone Manufacturers of EDC, VCM, and Other Organic Operations 0 NR NR Integrated Manufacturers of Chlor Alkali, EDC, VCM, and Other Organics Operations 7 10.1 8.9 million Manufacturers of PVC Only 0 NR NR Notes: 1TWPE were calculated using measured congener concentrations; therefore, the grams TEQ were not used to calculate the TWPE. For concentrations below detection limits, EPA assumed the concentration to be zero. NR = none reported Table 8 14 ( revised). Comparison of Wastewater Dioxin Discharges from Focus Group 3 ( TWPE calculated with 7/ 27/ 04 dioxin TWFs)

Product Group TRI ( 2000 Data) CCC ( 2000 Data) Industry Responses1 Number of Facilities Reporting g TM 17 TWP E Number of Facilities Reporting g TEQ TWP E Number of Facilities Reporting g TE Q TWP E2 Stand Alone Chlor Alkali 3 3.91 509,82 8 7 1.28 2.0 millio n 2 1.76 2.6 millio n Stand Alone EDC/ VCM 1 0.61 9,360 2 0 0 0 NC NC Integrated Chlor Alkali and EDC/ VCM 9 1,470 29,562 ,274 11 24 37 millio n 7 10.1 8.9 millio n Stand Alone PVC 0 0 0 0 0 0 0 NC NC Total 13 1,480 30 millio n 21 26 39 millio n 9 12 11.6 millio n Notes: A  12 1Some facilities provided one year of data ( not necessarily for 2000), and others provided multiple years of data. See [ DCN TBD] in the administrative record for details on how EPA calculated annual discharge. 2TWPE were calculated using measured congener concentrations; therefore, the grams TEQ were not used to calculate the TWPE. NC = not calculated. The facilities providing concentration data did not provide flows; therefore, grams of dioxin discharged could not be estimated. A  13 Table 8 15 ( revised). Listing of Facilities Manufacturing Chlor Alkali, EDC, VCM, and PVC ( TWPE calculated with 7/ 27/ 04 dioxin TWFs)

Site Name Location Discharg e Type Product( s) Manufactred4 Dioxin and Dioxin Like Compounds Reported for 2000 Additional Products Made, Comments,

and Previous Company Names Chlor Alkali ( Na and Cl) K and Cl Recover Chlorine by Other Means EDC VCM PVC TRI5 CCC6 g/ yr TWPE/ y r g/ yr TEQ TWPE/ yr Stand Alone Chlor Alkali Manufacturers Ashta Ashtabula,

OH Mercury cell Plastics, Coatings,

Polyurethanes and Industrial Chemicals Bayer Baytown, TX Membrane & HCl cells DuPont Niagara Falls,

NY Downs sodium GE Plastics Burkville, AL Diaphragm & membrane GE Plastics Mount Vernon, IN Diaphragm Kuehne Kearny, NJ Membrane Chlorine Institute lists location as Delaware City, DE,

but environmental data only exist for Kearny, NJ Occidental Chemical Company Delaware City, DE Mercury Cell 0.00013 201 Occidental Chemical Corporation Hahnville, LA Direct Diaphragm & membrane 0.86 31,952 1.08 1,673,725 Location also noted as Taft on CCC web site. A  14 Table 8 15 ( revised) Listing of Facilities Manufacturing Chlor Alkali, EDC, VCM, and PVC ( Continued)

( TWPE calculated with 7/ 27/ 04 dioxin TWFs)

Site Name Location Discharg e Type Product( s) Manufactred4 Dioxin and Dioxin Like Compounds Reported for 2000 Additional Products Made, Comments,

and Previous Company Names Chlor Alkali ( Na and Cl) K and Cl Recover Chlorine by Other Means EDC VCM PVC TRI5 CCC6 g/ yr TWPE/ y r g/ yr TEQ TWPE/ yr Occidental Chemical Corporation Mobile, AL Direct Membrane Membra ne 0.000036 56 Occidental Chemical Corporation Niagara Falls,

NY Both ( dioxin reported as indirect) Diaphragm 0.24 1,205 0.01 15,497 Olin Augusta, GA Mercury cell Olin Charleston,

TN Mercury cell Olin McIntosh, AL Diaphragm Believe this is the same plant as the jointly ventured Olin/ PolyOne McIntosh plant.

Sunbelt/ Olin McIntosh, AL Believe this is the same plant as the jointly ventured Olin/ PolyOne McIntosh plant.

Olin Niagara Falls,

NY Membrane Oxychem Muscle Shoals, AL Mercury cell Mercury cell 8.65E 08 0.134 A  15 Table 8 15 ( revised) Listing of Facilities Manufacturing Chlor Alkali, EDC, VCM, and PVC ( Continued)

( TWPE calculated with 7/ 27/ 04 dioxin TWFs)

Site Name Location Discharg e Type Product( s) Manufactred4 Dioxin and Dioxin Like Compounds Reported for 2000 Additional Products Made, Comments,

and Previous Company Names Chlor Alkali ( Na and Cl) K and Cl Recover Chlorine by Other Means EDC VCM PVC TRI5 CCC6 g/ yr TWPE/ y r g/ yr TEQ TWPE/ yr Pioneer Henderson,

NV Diaphragm Pioneer St. Gabriel,

LA Mercury cell Pioneer:

IDLED 2002 Tacoma, WA Diaphragm & membrane Idled 02/ 02 according to Chlorine Institute.

PPG Industries, Inc. Natrium/ New Martinsville,

WV Direct Diaphragm & mercury 2.81 476,671 0.19 299,101 Vulcan Port Edwards,

WI Mercury cell Vulcan4 Wichita, KS Direct Diaphragm & membrane

Georgia Pacific Green Bay,

WI Diaphragm Georgia Pacific Muskogee,

OK Membrane Georgia Pacific Rincon, GA Membrane Chlor Alkali and EDC/ VCM Manufacturers ( May Also Manufacture PVC)

Dow Plaquemine,

LA Direct Diaphragm Yesb Yesb 746 4,521,35 6 7.71 11,948,53 9 A  16 Table 8 15 ( revised) Listing of Facilities Manufacturing Chlor Alkali, EDC, VCM, and PVC ( Continued)

( TWPE calculated with 7/ 27/ 04 dioxin TWFs)

Site Name Location Discharg e Type Product( s) Manufactred4 Dioxin and Dioxin Like Compounds Reported for 2000 Additional Products Made, Comments,

and Previous Company Names Chlor Alkali ( Na and Cl) K and Cl Recover Chlorine by Other Means EDC VCM PVC TRI5 CCC6 g/ yr TWPE/ y r g/ yr TEQ TWPE/ yr Dow Freeport, TX Direct Diaphragm & membrane Magnesiu m Yesb Yesb 562 297,393 6.91 10,708,74 2 Dow Chemical at Oyster Creek is considered part of the Freeport Plant.

Georgia Gulf Plaquemine,

LA Direct Diaphragm Yesb Yesb Yesb 82.78 4,485,61 5 0.02 35,644 PPG Lake Charles,

LA Direct Diaphragm & mercury Yesb Yesb 75 14,738,4 33 8.98 13,916,71 5 Occidental Chemical Corp and Oxymar Ingleside, TX Direct Diaphragm Yesc Yesc 1.60 7,688 0.18 280,504 Occidental and Oxymar are the same plant and are located in Gregory, TX,

( Corpus Christi or Ingleside, TX  all listings are the same location). EDC Plant temporarily idled since June 2001 Occidental Chemical Convent, LA Direct Diaphragm Yesb 0.80 107,125 0.00204 3,161 Formosa Plastics Point Comfort, TX Direct Membrane Yesb Yesb Yesb 0.61 6,948

Formosa Plastics Corp Louisiana Baton Rouge,

LA Direct Diaphragm Yesb Yesb Yesb 0.001 8 30   A  17 Table 8 15 ( revised) Listing of Facilities Manufacturing Chlor Alkali, EDC, VCM, and PVC ( Continued)

( TWPE calculated with 7/ 27/ 04 dioxin TWFs)

Site Name Location Discharg e Type Product( s) Manufactred4 Dioxin and Dioxin Like Compounds Reported for 2000 Additional Products Made, Comments,

and Previous Company Names Chlor Alkali ( Na and Cl) K and Cl Recover Chlorine by Other Means EDC VCM PVC TRI5 CCC6 g/ yr TWPE/ y r g/ yr TEQ TWPE/ yr Oxyvinyls La Porte VCM Plant La Porte, TX Direct Yesa Yesa 2.33 251,788 0.00643 9,965 Also known as Geon of La Porte, TX and Formosa Plastics.

OxyVinyls Battleground Chlor Alkali Plant La Porte, TX Direct Diaphragm 4.830E

04 749 Oxy Vinyls Deer Park PVC Plant Deer Park, TX No reported discharg e Yesa Same NPDES permit as Oxy Vinyls Deer Park VCM Plant Oxyvinyls Deer Park VCM Deer Park, TX Direct Yes Yesb Yesb 0.031 47,732 Also known as Occidental Chemicals Deer Park VCM Plant and Geon.

Oxy Vinyls Deer Park Chlor Alkali Plant Deer Park, TX Direct 5.400E

01 836,863 Temporarily idled since December 27,

2001 Vulcan Geismar, LA Direct Diaphragm Yesb

Vulcan/ Mitsui Membrane Westlake Monomers Calvert City,

KY Direct Membrane Yesb Yesb Formerly a Goodrich Facility.

Stand Alone EDC/ VCM Manufacturers ( May Also Manufacture PVC) A  18 Table 8 15 ( revised) Listing of Facilities Manufacturing Chlor Alkali, EDC, VCM, and PVC ( Continued)

( TWPE calculated with 7/ 27/ 04 dioxin TWFs)

Site Name Location Discharg e Type Product( s) Manufactred4 Dioxin and Dioxin Like Compounds Reported for 2000 Additional Products Made, Comments,

and Previous Company Names Chlor Alkali ( Na and Cl) K and Cl Recover Chlorine by Other Means EDC VCM PVC TRI5 CCC6 g/ yr TWPE/ y r g/ yr TEQ TWPE/ yr Borden Chemical ( Geismar Vinyls) Geismar, LA Direct Yesc Yesc Yesc 0.61 9,360   Giesmar Vinyls purchased Borden's EDC/ VCM/ PVC plant in 2003 Georgia Gulf Lake Charles LLC Westlake, LA Transfer to Sasol N. A. 8 Yesa Yesa   Also known as Condea Vista Chemical Corp and Vista Chemical.

Location sometimes listed as Lake Charles.

Stand Alone PVC Manufacturers Certainteed Corp. Westlake, LA Direct Yesc Colorite Specialty Resins Burlington, NJ Direct Yesb Same plant as Geon and Polyone in Burlington.

Dow Texas City Plant Texas City,

TX Indirect Yesc Formerly Union Carbide  merged with Dow in 2001.

Formosa Plastics Delaware City, DE No reported discharg e Yesb   Also known as Georgia Gulf.

Formosa Plastics Illiopolis, IL Direct Yesc Purchased from Borden in 2002 A  19 Table 8 15 ( revised) Listing of Facilities Manufacturing Chlor Alkali, EDC, VCM, and PVC ( Continued)

( TWPE calculated with 7/ 27/ 04 dioxin TWFs)

Site Name Location Discharg e Type Product( s) Manufactred4 Dioxin and Dioxin Like Compounds Reported for 2000 Additional Products Made, Comments,

and Previous Company Names Chlor Alkali ( Na and Cl) K and Cl Recover Chlorine by Other Means EDC VCM PVC TRI5 CCC6 g/ yr TWPE/ y r g/ yr TEQ TWPE/ yr Georgia Gulf Aberdeen, MS Indirect Yesb Georgia Gulf Chemicals &

Vinyls L. L. C. Oklahoma City, OK No reported discharg e Yesc Occidental Chemical Corp. Pottstown, PA Indirect Yesb Oxy Vinyls Louisville,

KY No reported discharg e Yesc Formerly PolyOne Oxy Vinyls Pedricktown,

NJ Direct Yesb Formerly PolyOne Oxy Vinyls L. P. Pasadena PVC Plant Pasadena, TX Direct Yesc Polyone Corp. Burlington, NJ No reported discharg e Yesb Vinyl compounding site  closed in 2002 Polyone Corp. Henry, IL No reported discharg e Yesc Also known as Geon. Site Name Location Discharg e Type Product( s) Manufactred4 Dioxin and Dioxin Like Compounds Reported for 2000 Additional Products Made, Comments,

and Previous Company Names Chlor Alkali ( Na and Cl) K and Cl Recover Chlorine by Other Means EDC VCM PVC TRI5 CCC6 g/ yr TWPE/ y r g/ yr TEQ TWPE/ yr Shin tech Inc. Addis, LA Direct Yesc Purchased from Borden in 2002 Shintech Inc. Freeport, TX Direct Yesc Vygen Ashtabula,

OH No reported discharg e Yesc Appears to be closed as of 1993 Westlake PVC Corp. Calvert City,

KY Direct Yesc Westlake PVC Corp. Pensacola, FL No reported discharg e Yesc Appears to be closed.

Notes:

K and Cl stands for potassium and chlorine.

2Facilities may be regulated under additional effluent guidelines ( e. g., have operations in more than one point source category). This table shows which category would cover the process most likely generating the dioxin related discharges.

4Discharges all wastewater to a deep well.

5TRI dioxin TWPE are based on the congener specific distribution data in TRI. Where congener specific distribution data were not available, ERG used the average TWF for each product group: chlor alkali only, chlor alkali with EDC/ VCM, EDC/ VCM only, or PVC. For those sites not in an identified product, ERG used the median dioxin TWF of 6,666,667.

6CCC TWPE are based on a TWF of 421,600,000, which is the 2,3,4= 7,8 TCDD TWF, multiplied by the lbs TEQ. A dash () indicates that the facility reported 0 g TEQ to the CCC. Attachment B Petroleum Refining Tables TWPEs Recalculated using Revised TWFs for Dioxin and Its Congners B  1 Table 5 2 ( revised). Discharges Reported to the 2000 TRI for the Petroleum Refining Industry  Pollutants Comprising ~ 90% of the TWPE ( TWPE Calculated with 7/ 27/ 2004 Dioxin TWFs)

Pollutant Total Pounds Discharged Total TWPE Discharged Percent of Total TWPE Discharged TWPE Range per Reporting Refinery Average TWPE per Reporting Refinery Number of Reporting Refineries Dioxinsa 0.02 724,000 75% 218  272,300 40,212 17 PACsb 487 112,000 12% 460  40,400 5,900 19 Metals ( Top 5) c ( Vanadium Only) 98,200 76,000 ( 55,000) 8% ( 6%) 0.96  25,076 ( 3.7  25,076) 1316 ( 3,946) 42 ( 14)

TOTAL 98,702 912,000 95% 53 Source: EPA. TRI Releases 2000. a See Section 7.2 for a discussion on the calculation of TWPE. b See Section 6.2 for a discussion on the calculation of TWPE. c Top 5 metals include: Vanadium, Mercury, Selenium, Chromium, and Lead B  2 Table 7 2 ( revised). Petroleum Refineries Reporting Releases of Dioxins to 2000 TRI ( TWPE Calculated with 7/ 27/ 2004 Dioxin TWFs)

TRI ID Refinery Name City, State Direct Discharge ( grams/ yr) Direct Discharge ( TWPE) To POTW ( gr/ yr) After POTW a ( gr/ yr) After POTW a ( TWPE) Did Refinery Report Dioxin Congener Distribution?

77590MRTHNFOOTO Marathon Ashland Petroleum L. L. C. Texas City, TX 2 272,299         98221SHLLLWESTM Tesoro Northwest Co. Anacortes, WA 5.1999 97,127

70669CNCLKOLDSP Conoco Lake Charles Refy. Westlake, LA 0.5392 73,412         07036XXN 1400P Bayway Refining Co. Linden, NJ 0.254 63,720

43616SHLCM4001C Bp Oil Co. Toledo Refy. Oregon, OH 0.286 53,150

94802CHVRN841ST Chevron Prods. Co. Richmond Refy. Richmond, CA 0.34 45,598

90245CHVRN324WE Chevron Usa Prods. Co. El Segundo, CA 0.33 30,114

74603CNCPN1000S Conoco Inc. Ponca City Refy. Ponca City, OK 0.1809 24,627         59101CNCBL401SO Conoco Inc. Billings Refy. Billings, MT 0.1616 21,996         08066MBLLCBILLI Valero Refining Co. N. J. Paulsboro, NJ 0.09 12,253         00851HSSLVLIMET Hovensa L. L. C. Christiansted, VI 0.0693 9,441         80022CNCDN5801B Conoco Denver Refy. Commerce City, CO 0.06 8,169         39567CHVRNPOBOX Chevron Prods. Co. Pascagoula Refy. Pascagoula, MS 0.035 4,765         62454MRTHNMARAT Marathon Ashland Petroleum L. L. C. Robinson, IL 0.03 4,084         00654PHLPSPHILI Chevron Phillips Chemical Puerto Rico Guayama, PR 0.0022 297         70602CTGPTHIGHW Citgo Petroleum Corp. Lake Charles, LA 0.0016 218         79905CHVRN6501T Chevron Usa El Paso Refy. El Paso, TX     0.11 0.0187 2,546   Source: EPA, TRI Releases 2000.

a. Mass transferred to POTW, that is ultimately discharged to surface waters. Accounts for POTW removals. B  3 Table 7 3 ( revised). Petroleum Refineries Reporting 2,3,7,8 TCDD to the 2000 PCS ( TWPE Calculated with 7/ 27/ 2004 Dioxin TWFs)

NPDES ID Refinery Name City, State Direct Discharge ( milligrams/ yr) Direct Discharge ( TWPE/ yr)

AL0055859 Shell Oil Mobile Saraland, AL 0 0 CA0004961 Tesoro Refining Martinez, CA 0.664 a 1029.96 WI0003085 Murphy Oil USA Inc Superior, WI 0 0 Source: EPA, PCS Loads 2000. a Refinery reports TCDD equivalents. B  4 Table 7 6 ( revised). Dioxin Concentrations Measured in U. S. Petroleum Refinery Final Effluent ( TWPE Calculated with 7/ 27/ 2004 Dioxin TWFs)

Facility Source Results 2,3,7,8

TCDD ( pg/ L) TEQ ( pg/ L) Measured TWPE ( lb eq)

Tesoro Northwest Company Anacortes, WA WA DOE ( 1) March 8, 2000  split sample analyzed by two labs. Results shown average two results. Five congeners detected by at least one lab, including 1,2,3,4,6,7,8 HpCDF by both labs.

August 30, 2000  split sample analyzed by two labs. Results shown average two results. Nine congeners detected by at least one lab, including 1,2,3,4,6,7,8 HpCDF by both labs. < 3 < 4 3.1 to 21.3a 15.5 to 37.9a 57 to 563b ARCO Cherry Point Refinery Blaine, WA WA DOE ( 1) May 3, 2000  No congeners detected.

October 1, 2000  No congeners detected.

April 6, 2001  No congeners detected.

April 13, 2001 No congeners detected. < 10 < 10 < 10 < 10 0 0 0 0 0 U. S. Oil & Refining Co.

Tacoma, WA WA DOE ( 1) July 16 17, 2002  No congeners detected.

June 23  24, 2002  No congeners detected. ND ND 0 0 0 Shell Oil Products US Puget Sound Refinery Anacortes, WA WA DOE ( 2) January 2003  Only OCDD detected.

March 2003  No congeners detected.

January 2004  No congeners detected. ND ND ND 0.012 0 0 0.013 to 2338b Shell Oil Mobile Saraland, AL PCS ( 3) 1998 to 2000  permit requires yearly monitoring for 2,3,7,8 TCDD.

Never detected. ND 0 0 Murphy Oil USA Inc.

Superior, WI PCS ( 3) February 29, 2000  permit requires monitoring for 2,3,7,8 TCDD < 2.7 0 0 Tesoro Refining ( Previously Tosco)

Avon Refinery Martinez, CA PCS ( 3) March 31, 2000 June 30, 2000 October 31, 2000 permit requires quarterly reporting TCDD equivalents.

Discharge is 98% non process, 2% process. NR NR NR 0.00028 0.30 0.09 21.38 Facility Source Results 2,3,7,8

TCDD ( pg/ L) TEQ ( pg/ L) Measured TWPE ( lb eq)

B  5 Tosco ( 4) January  December, 1996 Outfall to bay  Results reported as TCDD TEQ.

Individual congeners not reported. Outfall includes process and non process sources of dioxins. Result shown is 12 month average.

June 1996  GAC outlet. Treated process wastewater.

August 1996  GAC outlet. Treated process wastewater NR NR NR 0.47 0.012 0.00 NC PDS ( 5) ca 1989  Outfall to bay. 13 ppq TCDF detected; not found when sample reanalyzed.

Re analyzed sample. Only OCDD detected ND ND 1.3 0.12 NC BP Oil Company Toledo Refining Oregon, OH BP ( 6) 2000  9 congeners detected 0 to 0.84c 0 to 4.29c 0 to 61,254c TOTAL MEASURED DIOXIN DISCHARGE: 21.4 to 63,613 Sources:

1. Washington State Department of Ecology. Letter of Transmittal. December 11, 2003 ( DCN 00711);

2. Shell Oil Products U. S. Puget Sound Refinery. Dioxin Study Report ( NPDES Permit WA 000294 1). June 2004.

3. U. S. EPA. PCS Loads 2000;

4. Tosco Refining Company Avon Refinery. Dioxin Source Investigation Pursuant to Cease and Desist Order No. 95 151, Final Report; and 5. U. S. EPA, 1996 Preliminary Data Summary, Table 6.9.

6. [ TBD]

NC  not calculated, reporting data for 2000 used to calculate TWPE for refinery.

ND  not detected, detection limit not reported.

NR  not reported a Low value assumes ND = 0; high value assumes ND = detection limit.

b Total year 2000 discharges. Low value assumes ND = 0; high value assumes ND = detection limit.

c All concentrations reported by BP were less than low end of calibration curve. Low value assumes all results were ND, and ND = 0. High value assumes detected results present at reported concentration and ND = detection limit. B  6 Table 8 2 ( revised). Metals Discharges as Percent of Total TWPE ( TWPE Calculated with 7/ 27/ 2004 Dioxin TWFs)

Pollutant Total TWPE Discharged Percent of Total TWPE Discharged TRI Loads Metals 84,368 9a Total 957,736 PCS Loads Metals 33,547 17 Total 192,862 Source: EPA. TRI Releases 2000 and PCS Loads 2000. a Metals comprise 70 percent of the TRI TWPE if PACs and dioxins are excluded.


[Federal Register Volume 83, Number 23 (Friday, February 2, 2018)]
[Notices]
[Pages 4946-4947]
[FR Doc No: 2018-02115]

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SECURITIES AND EXCHANGE COMMISSION

Submission for OMB Review; Comment Request

Upon Written Request, Copies Available From: Securities and Exchange
Commission, Office of FOIA Services, 100 F Street NE, Washington, DC
20549-2736

Extension:
    Rule 12d2-2 and Form 25, SEC File No. 270-86, OMB Control No.
3235-0080

    Notice is hereby given that pursuant to the Paperwork Reduction Act
of 1995 (44 U.S.C. 3501 et seq.), the Securities and Exchange
Commission (``Commission'') has submitted to the Office of Management
and Budget a request for approval of extension of the previously
approved collection of information provided for the following rule:
Rule 12d2-2 (17 CFR 240.12d2-2) and Form 25 (17 CFR 249.25).
    On February 12, 1935, the Commission adopted Rule 12d2-2,\1\ and
Form 25 under the Securities Exchange Act of 1934 (15 U.S.C. 78a et
seq.) (``Act''), which sets forth the conditions and procedures under
which a security may be delisted from an exchange and withdrawn from
registration under Section 12(b) of the Act.\2\ The Commission adopted
amendments to Rule 12d2-2 and Form 25 in 2005.\3\ Under the adopted
Rule 12d2-2, all issuers and national securities exchanges seeking to
delist and deregister a security in accordance with the rules of an
exchange must file the adopted version of Form 25 with the Commission.
The Commission also adopted amendments to Rule 19d-1 under the Act to
require exchanges to file the adopted version of Form 25 as notice to
the Commission under Section 19(d) of the Act. Finally, the Commission
adopted amendments to exempt standardized options and security futures
products from Section 12(d) of the Act. These amendments are intended
to simplify the paperwork and procedure associated with a delisting and
to unify general rules and procedures relating to the delisting
process.
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    \1\ See Securities Exchange Act Release No. 98 (February 12,
1935).
    \2\ See Securities Exchange Act Release No. 7011 (February 5,
1963), 28 FR 1506 (February 16, 1963).
    \3\ See Securities Exchange Act Release No. 52029 (July 14,
2005), 70 FR 42456 (July 22, 2005).
---------------------------------------------------------------------------

    The Form 25 is useful because it informs the Commission that a
security previously traded on an exchange is no longer traded. In
addition, the Form 25 enables the Commission to verify that the
delisting and/or deregistration has occurred in accordance with the
rules of the exchange. Further, the Form 25 helps to focus the
attention of delisting issuers to make sure that they abide by the
proper procedural and notice requirements associated with a delisting
and/or deregistration. Without Rule 12d2-2 and the Form 25, as
applicable, the Commission would be unable to fulfill its statutory
responsibilities.
    There are 21 national securities exchanges that could possibly be
respondents complying with the requirements of the Rule and Form 25.\4\
The burden of complying with Rule 12d2-2 and Form 25 is not evenly
distributed among the exchanges, however, since there are many more
securities listed on the New York Stock Exchange, the NASDAQ Stock
Market, and NYSE American than on the other exchanges. However, for
purposes of this filing, the Commission staff has assumed that the
number of responses is evenly divided among the exchanges. Since
approximately 800 responses under Rule 12d2-2 and Form 25 for the
purpose of delisting and/or deregistration of equity securities are
received annually by the Commission

from the national securities exchanges, the resultant aggregate annual
reporting hour burden would be, assuming on average one hour per
response, 800 annual burden hours for all exchanges (21 exchanges x an
average of 38.1 responses per exchange x 1 hour per response). In
addition, since approximately 100 responses are received by the
Commission annually from issuers wishing to remove their securities
from listing and registration on exchanges, the Commission staff
estimates that the aggregate annual reporting hour burden on issuers
would be, assuming on average one reporting hour per response, 100
annual burden hours for all issuers (100 issuers x 1 response per
issuer x 1 hour per response). Accordingly, the total annual hour
burden for all respondents to comply with Rule 12d2-2 is 900 hours (800
hours for exchanges + 100 hours for issuers). The related internal cost
of compliance associated with these burden hours is $188,400 ($157,000
for exchanges ($196.25 per response x 800 responses) and $31,400 for
issuers ($314 per response x 100 responses)).
---------------------------------------------------------------------------

    \4\ The staff notes that a few of these 21 registered national
securities exchanges only have rules to permit the listing of
standardized options, which are exempt from Rule 12d2-2 under the
Act. Nevertheless, the staff counted national securities exchanges
that can only list options as potential respondents because these
exchanges could potentially adopt new rules, subject to Commission
approval under Section 19(b) of the Act, to list and trade equity
and other securities that have to comply with Rule 12d2-2 under the
Act. Notice registrants that are registered as national securities
exchanges solely for the purposes of trading securities futures
products have not been counted since, as noted above, securities
futures products are exempt from complying with Rule 12d-2-2 under
the Act and therefore do not have to file Form 25.
---------------------------------------------------------------------------

    The collection of information obligations imposed by Rule 12d2-2
and Form 25 are mandatory. The response will be available to the public
and will not be kept confidential.
    An agency may not conduct or sponsor, and a person is not required
to respond to, a collection of information under the PRA unless it
displays a currently valid OMB control number.
    The public may view background documentation for this information
collection at the following website: www.reginfo.gov. Comments should
be directed to: (i) Desk Officer for the Securities and Exchange
Commission, Office of Information and Regulatory Affairs, Office of
Management and Budget, Room 10102, New Executive Office Building,
Washington, DC 20503, or by sending an email to:
[email protected]; and (ii) Pamela Dyson, Director/Chief
Information Officer, Securities and Exchange Commission, c/o Remi
Pavlik-Simon, 100 F Street NE, Washington, DC 20549, or by sending an
email to: [email protected]. Comments must be submitted to OMB within
30 days of this notice.

    Dated: January 30, 2018.
Eduardo A. Aleman,
Assistant Secretary.
[FR Doc. 2018-02115 Filed 2-1-18; 8:45 am]
 BILLING CODE 8011-01-P


[Federal Register Volume 88, Number 133 (Thursday, July 13, 2023)]
[Proposed Rules]
[Pages 44747-44748]
[FR Doc No: 2023-14434]

=======================================================================
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ENVIRONMENTAL PROTECTION AGENCY

40 CFR Part 52

[EPA-R06-OAR-2023-0090; FRL-11014-03-R6]

Air Plan Approval; Oklahoma; Revisions to Air Pollution Control
Rules

AGENCY: Environmental Protection Agency (EPA).

ACTION: Proposed rule, extension of public comment period.

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SUMMARY: On June 13, 2023, the Environmental Protection Agency (EPA)
proposed a rule titled ``Air Plan Approval; Revision to Air Pollution
Control Rules'' to approve revisions to the State Implementation Plan
(SIP) for Oklahoma submitted by the State of Oklahoma on January 30,
2023. The EPA is extending the comment period on this proposed rule
that currently closes on July 13, 2023, to allow additional time for
stakeholders to review and comment on the proposal.

DATES: The public comment period for the proposed rule published on
June 13, 2023 (88 FR 38433), is extended. Written comments must be
received on or before August 14, 2023.

ADDRESSES: Submit your comments, identified by Docket No. EPA-R6-OAR-
2023-0090, at https://www.regulations.gov or via email to
[email protected]. Follow the online instructions for submitting
comments. Once submitted, comments cannot be edited or removed from
Regulations.gov. The EPA may publish any comment received to its public
docket. Do not submit electronically any information you consider to be
Confidential Business Information (CBI) or other information whose
disclosure is restricted by statute. Multimedia submissions (audio,
video, etc.) must be accompanied by a written comment. The written
comment is considered the official comment and should include
discussion of all points you wish to make. The EPA will generally not
consider comments or comment contents located outside of the primary
submission (i.e., on the web, cloud, or other file sharing system). For
additional submission methods, please contact Mr. Emad Shahin, 214-665-
6717, [email protected]. For the full EPA public comment policy,
information about CBI or multimedia submissions, and general guidance
on making effective comments, please visit https://www.epa.gov/dockets/commenting-epa-dockets.

    Docket: The index to the docket for this action is available
electronically at www.regulations.gov. While all documents in the
docket are listed in the index, some information may not be publicly
available due to docket file size restrictions or content (e.g., CBI).

FOR FURTHER INFORMATION CONTACT: For information on the proposed rule
on the Oklahoma SIP revisions addressing emissions of VOC, please
contact Mr. Emad Shahin, EPA Region 6 Office, Infrastructure and Ozone
Section,<PHONE_NUMBER>, [email protected]. The EPA encourages the
public to submit comments via https://www.regulations.gov. Please call
or email the contact listed above if you need alternative access to
material indexed but not provided in the docket.

SUPPLEMENTARY INFORMATION: To allow for additional time for
stakeholders to provide comments, the EPA has decided to extend the
public comment periods as indicated in the DATES section of this
document.

    Dated: June 29, 2023.
David Garcia,
Director, Air and Radiation Division, Region 6.
[FR Doc. 2023-14434 Filed 7-12-23; 8:45 am]
BILLING CODE 6560-50-P