Appendix 8 to the RBCRs

Equations, Terms, and Values for Calculating Release-Specific Direct Exposure Criteria, Pollutant Mobility Criteria, Groundwater Protection Criteria, Surface-Water Protection Criteria, and Volatilization Criteria, for Additional Polluting Substances and Alternative Volatilization Criteria.

1. (1) Direct Exposure Criteria

   1. (A) Residential Direct Exposure Criteria shall be calculated using the following equations:

2. (i) For carcinogenic substances:

   1. (ii) For non-carcinogenic substances:

   2. (iii) The abbreviations in clauses (i) and (ii) of this subparagraph shall be interpreted in accordance with the following table and shall be assigned the values specified therein:

      Terms	Description	Value	Units
      ATc	Averaging Time – carcinogens	25,550	days
      ATadult	Averaging Time – adult non-carcinogen	8,760	days
      ATchild	Averaging Time – child non-carcinogen	2,190	days
      BWadult	Body Weight – adult	70	kg
      BWchild	Body Weight – child	15	kg
      CF	Conversion Factor	0.000001	kg/mg
      CSF	Cancer Slope Factor	Substance-specific	(mg/kg-day)-1
      RDECRB	Residential Risk-based Direct Exposure Criterion	calculated	mg/kg
      EDadult	Exposure Duration – adult non-carcinogen	24	years
      EDchild	Exposure Duration – child non-carcinogen	6	years
      EF	Exposure Frequency	365	days/year
      HI	Hazard Index	1.0	unitless
      IRadult	Ingestion Rate – adult	100	mg/day
      IRchild	Ingestion Rate – child	200	mg/day
      RfD	Reference Dose	Substance-specific	mg/kg-day
      RL	Target Cancer Risk Level	1.0E-06	unitless

   3. (iv) If the residential Direct Exposure Criteria calculated pursuant to this subparagraph exceeds the following ceiling values, the ceiling value shall be used in lieu of the calculated value:

      Volatile Organic Substances	Semi-volatile Substances	Pesticides, PCBs and ETPH	Inorganic Substances	Units
      500	1,000	500	50,000	mg/kg

3. (v) The residential direct exposure criteria may be adjusted up to the laboratory reporting limit if the commissioner determines that the calculated residential risk-based direct exposure criteria is less than the laboratory reporting limit for such substance.

   1. (B) Industrial/commercial Direct Exposure Criteria shall be calculated using the following equations:

4. (i) For carcinogenic substances:

   1. (ii) For non-carcinogenic substances:

   2. (iii) The abbreviations in clauses (i) and (ii) of this subparagraph shall be interpreted in accordance with the following table and shall be assigned the values specified therein:

      Terms	Description	Value	Units
      ATc	Averaging Time – carcinogens	25,550	days
      AT	Averaging Time – non-carcinogen	9,125	days
      BW	Body Weight – adult	70	kg
      CF	Conversion Factor	0.000001	kg/mg
      CSF	Cancer Slope Factor	substance-specific	(mg/kg-day)-1
      I/CDECRB	Industrial/Commercial Risk-based Direct Exposure Criterion	calculated	mg/kg
      ED	Exposure Duration	25	years
      EF	Exposure Frequency	250	days/year
      HI	Hazard Index	1.0	unitless
      IR	Ingestion Rate	50	mg/day
      RfD	Reference Dose	substance-specific	mg/kg-day
      RL	Target Cancer Risk Level	1.0E-06	unitless

   3. (iv) If the industrial/commercial direct exposure criteria calculated pursuant to this subparagraph exceeds the following ceiling values, the ceiling value shall be used in lieu of the calculated value:

      Volatile Substances	Semi-volatile Substances	Pesticides, PCBs and ETPH	Inorganic Substances	Units
      1,000	2,500	1,000	50,000	mg/kg

5. (v) The industrial/commercial direct exposure criteria may be adjusted up to the laboratory reporting limit if the commissioner determines that the calculated industrial/commercial risk-based direct exposure criteria is less than the laboratory reporting limit for such substance.

   1. (C) Managed Multifamily Residential Direct Exposure Criteria shall be calculated using the following equations:

6. (i) For non-carcinogenic substances:

   1. (0-6) x AT_{c_res}) / (SIR
   2. (0-6)_mf x EF_res x ED

   3. (0-6) x CF_soil)

      1. (ii) For substances (excluding Trichloroethylene) that are carcinogenic, but not mutagenic:

         DEC_{MFres_Cnm} (mg/kg) = (RL x AT)/(CSF x CF_soil x TSD_mf)

         Where:

         TSD_mf (mg/kg) = SD_0-6mf + SD_amf

         SD_0-6mf (mg/kg) = (SIR

   4. (0-6)mf x ED
   5. (0-6) x EF_res) / BW

   6. (0-6)

      1. (iii) For substances (excluding Trichloroethylene) that are carcinogenic and mutagenic:

         DEC_{MFres_Cm} = (RL x AT) / (CSF x CF_soil x TSDM_mf)

         Where:

         TSDM_mf (mg/kg) = SD_0-2mf + SD_2-6mf + SD_6-16mf + SD_16-30mf

         SD_0-2mf (mg/kg) = (SIR

      SD_amf (mg/kg) = (SIR_amf x ED_a x EF_res) / BW_a

   7. (0-2)_mf x ADAF
   8. (0-2) x ED
   9. (0-2) x EF_res) / BW

   10. (0-2)

       SD_2-6mf (mg/kg) = (SIR

   11. (2-6) x ADAF
   12. (2-6) x ED
   13. (2-6) x EF_res) / BW

   14. (2-6)

       SD_6-16mf (mg/kg) = (IR

   15. (6-16) x ADAF
   16. (6-16) x ED
   17. (6-16) x EF_res) / BW

   18. (6-16)

       SD_16-30mf (mg/kg) = (IR

   19. (16-30) x ADAF
   20. (16-30) x ED
   21. (16-30) x EF_res) / BW

   22. (16-30)

       1. (iv) For Trichloroethylene:

          DEC_mf-TCE = (RL x AT) / ((CSF_TCE-M x CF_soil x TSDM_mf) + (CSF_TCE-C x CF_soil x TSD_mf))

          Where:

          TSDM_mf (mg/kg) = SD_0-2mf + SD_2-6mf + SD_6-16mf + SD_16-30mf

          SD_0-2mf (mg/kg) = (SIR

   23. (0-2)_mf x ADAF
   24. (0-2) x ED
   25. (0-2) x EF_res) / BW

   26. (0-2)

       SD_2-6mf (mg/kg) = (SIR

   27. (2-6) x ADAF
   28. (2-6) x ED
   29. (2-6) x EF_res) / BW

   30. (2-6)

       SD_6-16mf (mg/kg) = (IR

   31. (6-16) x ADAF
   32. (6-16) x ED
   33. (6-16) x EF_res) / BW

   34. (6-16)

       SD_16-30mf (mg/kg) = (IR

   35. (16-30) x ADAF
   36. (16-30) x ED
   37. (16-30) x EF_res) / BW

   38. (16-30)

       TSD_mf (mg/kg) = SD_0-6mf + SD_amf

       SD_0-6mf (mg/kg) = (SIR

   39. (0-6)_mf x ED
   40. (0-6) x EF_res) / BW

   41. (0-6)

       SD_amf (mg/kg) = (SIR_a x ED_a x EF_res) / BW_a

   DEC_{C_MF_NC} (mg/kg) = (RfD x HI x BW

7. (v) The abbreviations in clauses (i) to (iv), inclusive, of this subparagraph shall be interpreted in accordance with the following table and shall be assigned the values specified therein:

   1. (D) Passive Recreation Direct Exposure Criteria shall be calculated using the following equations:

   Exposure Values for Soil Exposures - Managed Multifamily Residential
   Terms	Description	Value	Units
   Criteria Types
   DECC_MF_NC	Direct Exposure Criteria for Soil Exposures to Child Residents in a Managed Multifamily Residential Setting	Chemical Specific	mg/kg
   DECA_MF_NC	Direct Exposure Criteria for Soil Exposures to Adult Residents in a Managed Multifamily Residential Setting	Chemical Specific	mg/kg
   DECSW_MF_NC	Direct Exposure Criteria for Soil Exposures to Site Workers in a Managed Multifamily Residential Setting Non Cancer	Chemical Specific	mg/kg
   DECSW_MF_C	Direct Exposure Criteria for Soil Exposures to Site Workers in a Managed Multifamily Residential Setting (Carcinogen)	Chemical Specific	mg/kg
   DECMFres_Cnm	Direct Exposure Criteria for Soil Exposures to Child and Adult Residents in a Managed Multifamily Residential Setting (Carcinogens)	Chemical Specific	mg/kg
   DECMFres_Cm	Direct Exposure Criteria for Soil Exposures to Child and Adult Residents in a Managed Multifamily Residential Setting (Mutagens)	Chemical Specific	mg/kg
   DECmf-TCE	Direct Exposure Criteria for Soil Exposures to Child and Adult Residents in a Managed Multifamily Residential Setting (Trichloroethylene)	Chemical Specific	mg/kg
   Variables
   ADAF(0-2)	Age Dependent Adjustment Factor for mutagenic cancer risk - 0-2 years	10	unitless
   ADAF(16-30)	Age Dependent Adjustment Factor for mutagenic cancer risk - ages 16-30 years	1	unitless
   ADAF(2-6)	Age Dependent Adjustment Factor for mutagenic cancer risk - ages 2-6 years	3	unitless
   ADAF(6-16)	Age Dependent Adjustment Factor for mutagenic cancer risk - ages 6-16 years	3	unitless
   SDa_mf	Soil dose for adult residents in Multifamily Residential setting	5475	mg/kg
   SD(0-6)_mf	Soil dose for ages 0-6 in Multifamily Residential setting	12658.95954	mg/kg
   SD(0-2)_mf	Soil dose for ages 0-2 in Multifamily Residential setting	64,035.09	mg/kg
   SD(2-6)_mf	Soil dose for ages 2-6 in Multifamily Residential setting	25,317.92	mg/kg
   SD(6-16)_mf	Soil dose for ages 6-16 in Multifamily Residential setting	22,955.97	mg/kg
   SD(16-30)_mf	Soil dose for ages 16-30 in Multifamily Residential setting	3,421.88	mg/kg
   AT	Averaging Time -Carcinogens	25,550	days
   ATa_PRec	Averaging Time - Adult Non-carcinogen (passive recreation exposure)	8,760	days
   ATa_res	Averaging Time - Adult Non-carcinogen (residential exposure)	8,760	days
   ATc_PRec	Averaging Time - Child Non-carcinogen (passive recreation exposure)	2,190	days
   ATc_res	Averaging Time - Child Non-carcinogen (residential exposure)	2,190	days
   ATsw_mf	Averaging Time Adult site worker non-carcinogen MultiFamily Residential Exposure Scenario	9,125	days
   BW(0-2)	Body Weight - ages 0-2 years	11.4	kg
   BW(0-6)	Body Weight - ages 0-6 years	17.3	kg
   BW(16-30)	Body Weight - ages 16-30 years	80	kg
   BW(2-6)	Body Weight - ages 2-6 years	17.3	kg
   BW(6-16)	Body Weight - ages 6-16 years	47.7	kg
   BWa	Body Weight - Adult	80	kg
   CFsoil	Conversion Factor (kg/mg) for soil	0.000001	kg/mg
   CSF	Cancer Slope Factor	chem specific	chem specific
   CSFTCE-C	Cancer Slope Factor for Trichloroethylene carcinogenic risks	chem specific	chem specific
   CSFTCE-M	Cancer Slope Factor for Trichloroethylene for mutagenic risks	chem specific	chem specific
   ED(0-2)	Exposure Duration - ages 0-2 years	2	years
   ED(0-6)	Exposure Duration - ages 0-6 years	6	years
   ED(16-30)	Exposure Duration - ages 16-30 years	14	years
   ED(2-6)	Exposure Duration - ages 2-6 years	4	years
   ED(6-16)	Exposure Duration - ages 6-16 years	10	years
   EDa	Exposure Duration - Adult	24	years
   EDsw_mf	Exposure Duration site worker residential multifamily	25	years
   EFres	Exposure Frequency Residential	365	days/year
   EFsw_mf	Exposure Frequency site worker residential multifamily	250	days/year
   HI	Hazard Index	1	unitless
   TSDmf	Total Soil Dose for children and adults in a Multifamily Residential setting for eposures carcinogens	18,134.0	mg/kg
   TSDMmf	Total Soil Dose for children and adults in a Multifamily Residential setting for exposures to mutagens	115,730.9	mg/kg
   RfD	Reference Dose	chem specific	mg/kg/d
   RL	Risk Level	0.000001	unitless
   SIR(0-2)_mf	Soil Ingestion Rate - Residential Multifamily (ages 0 - 2 years)	100	mg/day
   SIR(0-6)_mf	Soil Ingestion Rate - (ages 0-6 years) Residential Multifamily	100	mg/day
   SIR(16-30)_mf	Soil Ingestion Rate -Residential Multifamily (age 16-30)	50	mg/day
   SIR(2-6)_mf	Soil Ingestion Rate - Residential Multifamily (ages 2-6 years)	100	mg/day
   SIR(6-16)_mf	Soil Ingestion Rate - (ages 6-16 years)	60	mg/day
   SIRa_mf	Soil Ingestion Rate - Adult Residential Multifamily	50	mg/day
   SIRsw_mf	Soil Ingestion Rate - Site Worker Residential Multifamily	100	mg/day

8. (i) For non-carcinogenic substances:

   1. (0-6) x AT_{c_PRec}) / (SIR
   2. (0-6)_PRec x EF_PRec x ED

   3. (0-6) x CF_soil)

      1. (ii) For substances (except Trichloroethylene) that are carcinogenic, but not mutagenic:

         DEC_{PRrec_Cnm} (mg/kg) = (RL x AT)/(CSF x CF_soil x TSD_PRec)

         Where:

         TSD_PRec (mg/kg) = SD_0-6PRec + SD_aPRec

         SD_0-6PRec (mg/kg) = (SIR

   4. (0-6)_PRec x ED
   5. (0-6) x EF_PRec) / BW

   6. (0-6)

      1. (iii) For substances (except Trichloroethylene) that are carcinogenic and mutagenic:

         DEC_{PRec_Cm} = (RL x AT) / (CSF x CF x TSDM_PRec)

         Where:

         TSDM_PRec (mg/kg) = SD_0-2PRec + SD_2-6PRec + SD_6-16PRec + SD_16-30PRec

         SD_0-2PRec (mg/kg) = (SIR

      SD_aPRec (mg/kg) = (SIR_aPRec x ED_a x EF_PRec) / BW_a

   7. (0-2)_PRec x ADAF
   8. (0-2) x ED
   9. (0-2) x EF_PRec) / BW

   10. (0-2)

       SD_2-6PRec (mg/kg) = (SIR

   11. (2-6)_PRec x ADAF
   12. (2-6) x ED
   13. (2-6) x EF_PRec) / BW

   14. (2-6)

       SD_6-16PRec (mg/kg) = (SIR

   15. (6-16)_PRec x ADAF
   16. (6-16) x ED
   17. (6-16) x EF_PRec) / BW

   18. (6-16)

       SD_16-30PRec (mg/kg) = (SIR

   19. (16-30)_Prec x ADAF
   20. (16-30) x ED
   21. (16-30) x EF_PRec) / BW

   22. (16-30)

       1. (iv) For Trichlorethylene

          DEC_PRecTCE = (RL x AT) / ((CSF_TCE-M x CF_soil x TSDM_PRec) + (CSF_TCE-C x CF_soil x TSD_PRec))

          Where:

          TSDM_PRec (mg/kg) = SD_0-2PRec + SD_2-6PRec + SD_6-16PRec + SD_16-30PRec

          SD_0-2PRec (mg/kg) = (SIR

   23. (0-2)_PRec x ADAF
   24. (0-2) x ED
   25. (0-2) x EF_PRec) / BW

   26. (0-2)

       SD_2-6PRec (mg/kg) = (SIR

   27. (2-6)_PRec x ADAF
   28. (2-6) x ED
   29. (2-6) x EF_PRec) / BW

   30. (2-6)

       SD_6-16PRec (mg/kg) = (SIR

   31. (6-16)_PRec x ADAF
   32. (6-16) x ED
   33. (6-16) x EF_PRec) / BW

   34. (6-16)

       SD_16-30PRec (mg/kg) = (SIR

   35. (16-30)_Prec x ADAF
   36. (16-30) x ED
   37. (16-30) x EF_PRec) / BW

   38. (16-30)

       TSD_PRec (mg/kg) = SD_0-6PRec + SD_aPRec

       SD_0-6PRec (mg/kg) = (SIR

   39. (0-6)_PRec x ED
   40. (0-6) x EF_PRec) / BW

   41. (0-6)

       1. (iv) The abbreviations in clauses (i) to (iv), inclusive, of this subparagraph shall be interpreted in accordance with the following table and shall be assigned the values specified therein:

          Exposure Values for Soil Exposures - Passive Recreational
          Terms	Description	Value	Units
          Criteria Types
          DECC_PRec_NC	Direct Exposure Criteria for Soil Exposures to Children aged 0-6 years in a Passive Recreation Setting (Non Cancer)	Chemical Specific	mg/kg
          DECA_PRec_NC	Direct Exposure Criteria for Soil Exposures to Adult Residents in a Passive Recreation Setting (Non cancer)	Chemical Specific	mg/kg
          DECPRec_Cnm	Direct Exposure Criteria for Soil Exposures to Children and Adults in a Passive Recreation Setting (carcinogens)	Chemical Specific	mg/kg
          DECPRec_Cm	Direct Exposure Criteria for Soil Exposures to Children and Adults in a Passive Recreation Setting (Mutagens)	Chemical Specific	mg/kg
          DECPRec_TCE	Direct Exposure Criteria for Soil Exposures to Children and Adults in a Passive Recreation Setting (Trichloroethylene)	Chemical Specific	mg/kg
          Variables
          ADAF(0-2)	Age Dependent Adjustment Factor for mutagenic cancer risk - 0-2 years	10	unitless
          ADAF(16-30)	Age Dependent Adjustment Factor for mutagenic cancer risk - ages 16-30 years	1	unitless
          ADAF(2-6)	Age Dependent Adjustment Factor for mutagenic cancer risk - ages 2-6 years	3	unitless
          ADAF(6-16)	Age Dependent Adjustment Factor for mutagenic cancer risk - ages 6-16 years	3	unitless
          SDa_Prec	Soil dose for adult residents in Multifamily Residential setting	4680	mg/kg
          SD(0-6)_PRec	Soil dose for ages 0-6 in Multifamily Residential setting	7213.872832	mg/kg
          SD(0-2)_PRec	Soil dose for ages 0-2 in Multifamily Residential setting	36,491.23	mg/kg
          SD(2-6)_PRec	Soil dose for ages 2-6 in Multifamily Residential setting	14,427.75	mg/kg
          SD(6-16)_PRec	Soil dose for ages 6-16 in Multifamily Residential setting	13,081.76	mg/kg
          SD(16-30)_PRec	Soil dose for ages 16-30 in Multifamily Residential setting	2,925.00	mg/kg
          AT	Averaging Time -Carcinogens	25,550	days
          ATa_PRec	Averaging Time - Adult Non-carcinogen (passive recreation exposure)	8,760	days
          ATc_PRec	Averaging Time - Child Non-carcinogen (passive recreation exposure)	2,190	days
          BW(0-2)	Body Weight - ages 0-2 years	11.4	kg
          BW(0-6)	Body Weight - ages 0-6 years	17.3	kg
          BW(16-30)	Body Weight - ages 16-30 years	80	kg
          BW(2-6)	Body Weight - ages 2-6 years	17.3	kg
          BW(6-16)	Body Weight - ages 6-16 years	47.7	kg
          BWa	Body Weight - Adult	80	kg
          CFsoil	Conversion Factor (kg/mg) for soil	0.000001	kg/mg
          CSF	Cancer Slope Factor	chem specific	chem specific
          CSFTCE-C	Cancer Slope Fator for Trichloroethylene non- mutagenic risks	chem specific	chem specific
          CSFTCE-M	Cancer Slope Fator for Trichloroethylene for mutagenic risks	chem specific	chem specific
          ED(0-2)	Exposure Duration - ages 0-2 years	2	years
          ED(0-6)	Exposure Duration - ages 0-6 years	6	years
          ED(16-30)	Exposure Duration - ages 16-30 years	14	years
          ED(2-6)	Exposure Duration - ages 2-6 years	4	years
          ED(6-16)	Exposure Duration - ages 6-16 years	10	years
          EDa	Exposure Duration - Adult	24	years
          EF_PRec	Exposure Frequency Recreation	208	days/year
          HI	Hazard Index	1	unitless
          TSDMPRec	Total Soil Dose for children and adults in a Passive Recreation setting for exposures to mutagens	66,925.7	mg/kg
          TSDPRec	Total Soil Dose for children and adults in a Passive Recreation setting for exposures to Carcinogens	11,893.9	mg/kg
          RfD	Reference Dose	chem specific	mg/kg/d
          RL	Risk Level	0.000001	unitless
          SIR(0-2)_PRec	Soil Ingestion Rate - Passive Recreation ages 0-2 years	100	mg/day
          SIR(0-6)_PRec	Soil Ingestion Rate - Passive Recreation ages 0-6 years	100	mg/day
          SIR(16-30)_PRec	Soil Ingestion Rate - Passive Recreation ages 16-30 years	75	mg/day
          SIR(2-6)_PRec	Soil Ingestion Rate - Passive Recreation ages 2-6 years	100	mg/day
          SIRa_PRec	Soil Ingestion Rate - Passive Recreation Adult	75	mg/day
          SIRc(6-16)_PRec	Soil Ingestion Rate - Passive Recreation Ages 6-16 years	60	mg/day

       SD_aPRec (mg/kg) = (SIR_aPRec x ED_a x EF_PRec) / BW_a

   42. (2) Pollutant Mobility Criteria

       1. (A) Pollutant Mobility Criteria for inorganic substances shall be calculated using the following equations:

   DEC_{C_PRec_NC} (mg/kg) = (RfD x HI x BW

9. (i) For GA area groundwater classification:

   1. (ii) For GB area groundwater classification:
   2. (B) Pollutant Mobility Criteria for organic substance shall be calculated using the following equations:

10. (i) For GA area groundwater classification:

    1. (ii) For GB area groundwater classification:

    2. (C) The abbreviations in subparagraphs (A) and (B) of this subdivision shall be interpreted in accordance with the following table and shall be assigned the values specified therein:

       Terms	Description	Value	Units
       AAF	Analytical Adjustment Factors	20	unitless
       CF	Conversion Factor	0.001	mg/µg
       DF	Dilution Factor	10	unitless
       GWPC	Groundwater Protection Criteria	substance-specific	µg/L
       PMC	Pollutant Mobility Criteria	calculated	mg/kg or mg/L

    3. (3) Groundwater Protection Criteria

       1. (A) Groundwater Protection Criteria shall be calculated for carcinogenic substances using the following equation:
       2. (B) Groundwater Protection Criteria shall be calculated for non-carcinogenic substances using the following equation:

       3. (C) The abbreviations in subparagraphs (A) and (B) of this subdivision shall be interpreted in accordance with the following table and shall be assigned the values specified therein:

          Terms	Description	Value	Units
          AT	Averaging Time	25,550	days
          BW	Body Weight	70	kg
          CSF	Cancer Slope Factor	Substance-specific	(mg/kg-day)-1
          CF	Conversion Factor	0.001	mg/µg
          ED	Exposure Duration	70	years
          EF	Exposure Frequency	365	days/year
          GWPC	Risk-based Groundwater Protection Criterion	calculated	µg/L
          HI	Hazard Index	1.0	unitless
          IR	Ingestion Rate	2	L/day
          RfD	Reference Dose	Substance-specific	mg/kg-day
          RL	Target Cancer Risk Level	1.0E-06	unitless
          SA	Source Allocation	0.2	unitless

       4. (D) If the Groundwater Protection Criteria calculated pursuant to subparagraph (A) or (B) of this subdivision exceeds the following ceiling values, the ceiling value shall be used in lieu of the calculated value:

          Volatile Substances	Semi-volatile Substances	Pesticides, PCBs, and ETPH	Inorganic Substances	Units
          1,000	1,000	1,000	50,000	µg/L

       5. (E) The groundwater protection criteria may be adjusted up to the laboratory reporting limit if the commissioner determines that the calculated risk-based groundwater protection criteria is less than the laboratory reporting limit for such substance.
       6. (F) The groundwater protection criteria may be adjusted down to the organoleptic threshold if the commissioner determines that the calculated risk-based groundwater protection criteria is higher than the organoleptic threshold for such substance.

    4. (4) Surface-Water Protection Criteria

       1. (A) Determining Water Quality Criteria

          For substances that have no water quality criteria in the water quality standards, such criteria shall be determined using EPA’s national recommended water quality criteria and, if no such criteria are available, then by using the following:

11. (i) Determining the Water Quality Criteria for Chronic Aquatic Life

    1. (I) In accordance with title 40 CFR 132 Appendix A (Great Lakes Water Quality Initiative Methodologies for Development of Aquatic Life Criteria and Values);

       1. (II) Using the Tier 1 protocols for calculating a Criterion Continuous Concentration; or
       2. (III) If insufficient information is available to use the Tier 1 Criterion Continuous Concentration procedure, using the Tier 2 protocols for calculating a Secondary Continuous Concentration.
       3. (ii) Calculating the Water Quality Criteria for Human Health for Fish Consumption:

    2. (I) For carcinogenic substances:

       1. (II) For non-carcinogenic substances:

       2. (III) The abbreviations in subclauses (I) and (II) of this clause shall be interpreted in accordance with the following table and shall be assigned the values specified therein:

          Terms	Description	Value	Units
          BAF	Bioaccumulation Factor	substance-specific	unitless
          BW	Body Weight	70	kg
          CF	Conversion Factor	1,000	µg/mg
          CSF	Cancer Slope Factor	substance-specific	(mg/kg-day)-1
          FC	Fish Consumption Rate	0.0175	kg/d
          RfD	Reference Dose	substance-specific	mg/kg-day
          RL	Risk Level	1.00E-06	unitless
          WQC	Water Quality Criteria	calculated	µg/L
          RSC	Relative Source Contribution	0.2	unitless

    3. (B) Calculating the Surface-Water Protection Criteria

       The risk-based surface-water protection criteria shall be calculated, for the lower of aquatic life or human health water quality criteria:

12. (i) Water quality criteria for freshwater chronic aquatic life protection as determined using subparagraph (A) of this subdivision, multiplied by 10; or

    1. (ii) Water quality criteria for human health for fish consumption calculated using subparagraph (A) of this subdivision, multiplied by the applicable flow factor multiplied by 10, using the following values:

       Flow Factor	Substance Risk Level
       1	For known human carcinogens or substances which may bioaccumulate BCF>100
       2	For non-carcinogenic substances
       3	For carcinogenic substances

    2. (C) If the surface-water protection criteria calculated pursuant to subparagraph (B) of this subdivision exceeds the following ceiling values, the ceiling value shall be used in lieu of the calculated value:

       Volatile Substances	Semi-volatile Substances	Pesticides, PCBs and ETPH	Inorganic Substances	Units
       10,000	10,000	10,000	10,000	µg/L

    3. (D) The surface-water protection criteria may be adjusted up to the laboratory reporting limit if the commissioner determines that the calculated risk-based surface-water protection criteria is less than the laboratory reporting limit for such substance.

    4. (5) Volatilization Criteria

       1. (A) Residential Target Indoor Air Concentrations shall be calculated using the following equations:

13. (i) For carcinogenic substances:

    1. (ii) For non-carcinogenic substances:

    2. (iii) The abbreviations in this subparagraph shall be interpreted in accordance with the following table and shall be assigned the values specified therein:

       Terms	Description	Value	Units
       AT	Averaging Time – non-carcinogen	10,950	days
       ATc	Averaging Time – carcinogen	25,550	days
       BW	Body Weight	70	kg
       CexpF	Children’s Exposure Factor	2	unitless
       CF	Conversion Factor	1,000	µg/mg
       CsensF	Children’s Sensitivity Factor CsensF = 1 for non-carcinogens and non-mutagenic carcinogens. CsensF = 2 for mutagenic carcinogens	substance-specific	unitless
       CSFi	Cancer Slope Factor – Inhalation	substance-specific	(mg/kg-day)-1
       ED	Exposure Duration	30	years
       EF	Exposure Frequency	350	days/year
       HQ	Hazard Quotient	1	unitless
       IRair	Inhalation Rate – air	20	m3/day
       RfDi	Reference Dose – inhalation	substance-specific	mg/kg-day
       RL	Risk Level	1.00E-06	unitless
       TAC	Target Indoor Air Concentration	calculated	µg/m3

    3. (iv) If the residential Target Indoor Air Concentration calculated pursuant to clause (i) or (ii) of this subparagraph exceeds a ceiling value of 500 µg/m³, the ceiling value shall be used in lieu of the calculated value.
    4. (B) Industrial/Commercial Target Indoor Air Concentrations shall be calculated using the following equations:

14. (i) For carcinogenic substances:

    1. (ii) For non-carcinogenic substances:

    2. (iii) The abbreviations used in this subparagraph shall be interpreted in accordance with the following table and shall be assigned the values specified therein:

       Terms	Description	Value	Units
       AT	Averaging Time – non-carcinogen	9,125	days
       ATc	Averaging Time – carcinogen	25,550	days
       BW	Body Weight	70	kg
       CF	Conversion Factor	1,000	µg/mg
       CSFi	Cancer Slope Factor – inhalation	substance-specific	(mg/kg-day)-1
       ED	Exposure Duration	25	years
       EF	Exposure Frequency	250	days/year
       HQ	Hazard Quotient	1	unitless
       IRair	Inhalation Rate – air	10	m3/day
       RfDi	Reference Dose – inhalation	substance-specific	mg/kg-day
       RL	Risk Level	1.00E-06	unitless
       TAC	Target Indoor Air Concentration	substance-specific	µg/m3

    3. (iv) If the industrial/commercial Target Indoor Air Concentration calculated pursuant to clause (i) or (ii) of this subparagraph exceeds a ceiling value of 500 µg/m³, the ceiling value shall be used in lieu of the calculated value.
    4. (C) Volatilization Criteria shall be calculated using the following equations:

15. (i) For Volatilization Criteria for Groundwater:

    1. (ii) If the groundwater volatilization criteria calculated pursuant to (i) this subparagraph exceeds a ceiling value of 50,000 µg/L, the ceiling value shall be used in lieu of the calculated value.
    2. (iii) For Volatilization Criteria for Soil Vapor:
    3. (iv) The attenuation factor for diffusion and advection (α) shall be calculated using the following equations:

16. (v) The abbreviations used in this subparagraph shall be interpreted in accordance with the following table and shall be assigned the values specified therein:

    Terms	Description	Value	Units
    α	Attenuation Factor for Diffusion and Advection	calculated	unitless
    AB	Surface Area of the Enclosed Space in Contact with Soil	site-specific	m2
    CF	Conversion Factor	1,000	L/m3 or µg/mg
    Dair	Molecular Diffusion Coefficient in Air	substance-specific	m2/d
    DeffT	Total Effective Diffusion	calculated	m2/d
    Deffcrack	Effective Diffusion Through Foundation Cracks	calculated	m2/d
    Deffcap	Effective Diffusion Through Capillary Fringe	calculated	m2/d
    Deffvadose	Effective Diffusion Through Vadose Zone	calculated	m2/d
    Dwater	Molecular Diffusion Coefficient in Water	substance-specific	m2/d
    Dwater/Dair	Ratio of Molecular Diffusion in Water to Air = Dwater/Dair	calculated	unitless
    EB	Enclosed Space Air Exchange Rate	site-specific	1/day
    GWVC	Groundwater Volatilization Criteria	calculated	µg/L
    H	Henry’s Law Constant	substance-specific	unitless
    k	Soil Vapor Permeability	site-specific	cm2
    LT	Depth from foundation to source	site-specific	m
    Lcap	Thickness of Capillary Fringe	site-specific	m
    Lcrack	Foundation Thickness	site-specific	m
    Lvadose	Thickness of Vadose Zone = LT - Lcap	calculated	m
    MV	Molar Volume (at standard conditions)	24.45	L
    MW	Molecular Weight	substance-specific	g/mol
    η	Fraction of Enclosed Space Area Open for Vapor Intrusion	site-specific	m2/m2
    θm-cap	Volumetric Moisture Content in Cracks in Capillary Fringe	site-specific	unitless
    θT-cap	Total Porosity in Capillary Fringe	site-specific	unitless
    θV-cap	Volumetric Vapor Constant in Capillary Fringe	calculated	unitless
    θm-crack	Volumetric Moisture Content in Cracks	site-specific	unitless
    θT-crack	Total Porosity in Crack	site-specific	unitless
    θV-crack	Volumetric Vapor Content in Cracks	calculated	unitless
    θm-vadose	Volumetric Moisture Content in Vadose Zone	site-specific	unitless
    θT-vadose	Total Porosity in Vadose Zone	site-specific	unitless
    θV-vadose	Volumetric Vapor Content in Vadose Zone	calculated	unitless
    ΔP	Indoor-Outdoor Air Pressure Difference	site-specific	g/ms2
    QB	Enclosed Space Volumetric Air Flow Rate	site-specific	m3/d
    Qsoil	Pressure Driven Soil Gas Flow Rate from the subsurface into the enclosed space	site-specific	m3/d
    Qsoil/QB	Ratio of Soil Gas Intrusion Rate to Building Ventilation Rate = Qsoil/QB	calculated	unitless
    Rcrack	Effective Crack Radius or Width = ηAB/Xcrack	calculated	m
    SVVC	Soil Vapor Volatilization Criteria	calculated	mg/m3
    TAC	Target Indoor Air Concentration calculated using subparagraph (A) or (B), as applicable	substance-specific	µg/m3
    µ	Viscosity of Air	calculated	g/ms
    VB	Enclosed Space Volume	site-specific	m3
    VB/VA	Ratio of Enclosed Space Volume to Exposed Surface Area = VB/VA	calculated	m
    Xcrack	Total Length of Cracks through which Soil Gas Vapors are Flowing	calculated	m
    Zcrack	Crack Opening Depth Below Grade	calculated	m

(Effective March 1, 2026)