Risk Screening Worksheet Fact Sheet | Summaries Environmental Engineering

June 29th, 2020

FACT SHEET

Revision to NJDEP Division of Air Quality Risk Screening Worksheet for Carcinogenic

Effects and Noncarcinogenic Long-Term and Short-Term Effects (Worksheet) as Listed in

Technical Manual 1003 “Guidance on Preparing a Risk Assessment for Air Contaminant

Emissions”

NOTE: The final revised Worksheet is available on the Department’s website at

https://www.state.nj.us/dep/aqpp/risk.html. This Worksheet is an optional tool that

regulated facilities can use to demonstrate negligible risk without conducting a refined

risk assessment, pursuant to N.J.A.C. 7:27-8.5, for Preconstruction Permits, and N.J.A.C.

7:27-22.8, for Operating Permits. Facilities may choose to initially determine health risks

with a refined risk assessment and not use the Worksheet.

The following outlines the changes to the final revised Worksheet along with background

information used to support the change:

1. The minimum stack height for sources to use the Worksheet has been raised from

10 feet to 15 feet.

The Department concluded that source operations with stack heights less than 15 feet

should not use the Worksheet and should have their potential health risks evaluated on a

case-by-case basis. Stacks heights less than 15 feet do not provide sufficient dispersion

and, therefore, would require refined risk assessment.

The change to the stack height restriction should not significantly impact the average

time and resources needed to obtain an Air Pollution Control Permit as most stacks are

already above 15 feet tall.

2. Sulfuryl fluoride (SF) has not been added to the Worksheet.

Based on comments received, the acute and chronic sulfuryl fluoride reference

concentrations proposed in the draft Worksheet have been removed. Reference

concentrations for sulfuryl fluoride will be proposed for public review and comment after

the Department reviews California Environmental Protection Agency’s research findings,

which are scheduled to be issued by early 2021, as well as any additional information and

data published by recognized government or academic entities.

3. Carbonyl Sulfide has been added to the Worksheet with the following reference

concentrations: Averaging time of 24 hours 660 micrograms per cubic meter

(µg/m3); and Long-term or chronic 10 µg/m3.

Although carbonyl sulfide had been designated as a hazardous air pollutant (HAP) by the

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Revision to NJDEP Division of Air Quality Risk Screening Worksheet for Carcinogenic Effects and Noncarcinogenic Long-Term and Short-Term Effects (Worksheet) as Listed in Technical Manual 1003 “Guidance on Preparing a Risk Assessment for Air Contaminant Emissions” NOTE: The final revised Worksheet is available on the Department’s website at https://www.state.nj.us/dep/aqpp/risk.html. This Worksheet is an optional tool that regulated facilities can use to demonstrate negligible risk without conducting a refined risk assessment, pursuant to N.J.A.C. 7: 27 - 8.5, for Preconstruction Permits, and N.J.A.C. 7:27-22.8, for Operating Permits. Facilities may choose to initially determine health risks with a refined risk assessment and not use the Worksheet. The following outlines the changes to the final revised Worksheet along with background information used to support the change:

1. The minimum stack height for sources to use the Worksheet has been raised from 10 feet to 15 feet. The Department concluded that source operations with stack heights less than 15 feet should not use the Worksheet and should have their potential health risks evaluated on a case-by-case basis. Stacks heights less than 15 feet do not provide sufficient dispersion and, therefore, would require refined risk assessment. The change to the stack height restriction should not significantly impact the average time and resources needed to obtain an Air Pollution Control Permit as most stacks are already above 15 feet tall. 2. Sulfuryl fluoride (SF) has not been added to the Worksheet. Based on comments received, the acute and chronic sulfuryl fluoride reference concentrations proposed in the draft Worksheet have been removed. Reference concentrations for sulfuryl fluoride will be proposed for public review and comment after the Department reviews California Environmental Protection Agency’s research findings, which are scheduled to be issued by early 2021, as well as any additional information and data published by recognized government or academic entities. 3. Carbonyl Sulfide has been added to the Worksheet with the following reference concentrations: Averaging time of 24 hours 660 micrograms per cubic meter (μg/m^3 ); and Long-term or chronic 1 0 μg/m^3. Although carbonyl sulfide had been designated as a hazardous air pollutant (HAP) by the

USEPA and is listed in N.J.A.C. 7:27-17 “Control and Prohibition of Air Pollution by Toxic Substances and Hazardous Air Pollutants,” it was not previously included in the Worksheet due to a lack of published toxicity values. Health impacts associated with carbonyl sulfide include developmental impairments to organs and neurological/nervous system impairment. CalEPA issued the Reference Concentrations for carbonyl sulfide on February 21, 2017.

4. 1 - bromopropane (n-propyl bromide or nPB) has been added to the Worksheet with the following reference concentrations: Averaging time of 24 hours 5 , 030 micrograms per cubic meter (μg/m^3 ); and Long-term or chronic 101 μg/m^3. Based on the nPB’s high toxicity and its potential for significant use in dry cleaning and other commercial operations and to ease the burden on facilities which use the compound, nPB has been added to the Worksheet. The Agency for Toxic Substances and Disease Registry (ATSDR), which is part of the U.S. Department of Health and Human Services, issued Reference Concentrations for short- and long-term non-carcinogenic health impacts in August 2017. The ATSDR’s website is https://www.atsdr.cdc.gov/. nPB exposure can cause neurological and nervous system disorders. Health studies also show that nPB emissions can result in reproductive and developmental effects and carcinogenicity. Although nPB is not listed by the USEPA as a HAP, there are numerous government studies, and academic and clinical reports that demonstrate that nPB potential health impacts should be evaluated when a facility proposes to emit the substance to the ambient air. Several nPB Unit Risk Factors (URF) for carcinogenic impacts have been developed but have not been finalized. Once a URF has been formally adopted by a recognized source, the Department will propose its inclusion in the Worksheet. 5. Clarification to the URF associated with nickel and nickel containing compounds Nickel compounds, like nickel refinery dust and nickel subsulfide, are listed in N.J.A.C. 7:27-17.9(b) Table 2 with corresponding reporting thresholds. However, these nickel compounds were not specifically listed in the Worksheet. The Department is clarifying the risk screening of these two nickel compounds by adding their corresponding URFs. An URF of 2.4E-04 (μg/m^3 )-^1 is listed for nickel refinery dust and an URF of 4.8E- 04 (μg/m^3 )-^1 is listed for nickel subsulfide. The nickel and compounds listed URF in the spreadsheet changed to 4.8E-04 (μg/m^3 )-^1 , which is the most stringent listed URF for any nickel compound.

URF – Unit Risk Factor – (microgram per cubic meter - μg/m^3 )-^1 RfC – Reference concentration – μg/m^3 RfCst – Reference concentration, short-term – μg/m^3 ** Cal EPA – California Environmental Protection Agency, Office of Environmental Health Hazard Assessment IRIS – United States Environmental Protection Agency, Integrated Risk Information System ATSDR – Agency for Toxic Substances and Disease Registry, U.S. Department of Health and Human Services AEGL – Acute Exposure Level Guideline *** Toxicity values apply to each isomer or a combination of any isomer mixture, whichever is higher *Air Toxic Type of toxicity value- Toxicity Value Source, Date Issued by Source, Comment - **** Previous Revised tetrachloroethylene (perchloroethylene) URF 5.9E- 06 6.1E- 06 CalEPA, 9/8/2016, Previous URF value is from CalEPA carbonyl sulfide RfC N/A 1.0E+01 CalEPA, 2/21/2017, Revised RfCst is a 1 - hour average, No Previous RfC or RfCst RfCst N/A 6.6E+ ethylene glycol mono-n- butyl ether RfC RfCst

1.6E+

1.4E+

8.2E+

4.7E+

CalEPA, 5/4/2018, Previous RfC value is from IRIS, Revised RfCst is a 1-hour average, Previous RfCst is a 1 - hour average value from CalEPA phosphine RfCst N/A 7.0E+01 CalEPA, 6/13/2014, Revised RfCst is a 24 - hour average, No previous RfCst

Risk Screening Worksheet Fact Sheet, Summaries of Environmental Engineering

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1.6E+

1.4E+

8.2E+

4.7E+