# Appendix 6

Acute Impacts Refined Analysis Figures

# Refined Acute Modeling Approach

Initial acute screening risk calculation s were performed with the HEM-3 model.

HEM-3 estimates acute (1-hour) impacts at both polar and census block receptors. It is

assumed for this short period of time that an exposed individual coul d be located at any

off-site location. The lack of readily av ailable detailed property boundary information

for many of the facilities evaluated made it difficult to determine whether receptors were

on- or off-site. In the absence of such info rmation, the first ring of polar receptors was

placed 100 meters from the plant center for ma ny facilities. However, these polar rings

often transected on-site locati ons, restricting public access to exposures at these levels

and thereby overestimating exposures.

The screening approach used by HEM-3 to estimate maximum 1-hour exposures

also likely overestimates. To estimate ma ximum 1-hour concentrati ons at each receptor,

HEM-3 sums the maximum concentrations at tributed to each source, regardless of

whether those maximum concentrations occurr ed during the same hour. In other words,

HEM-3 assumes that the maximum impact from each source at each r eceptor occurs at

the same time. In actuality, maximum imp acts from different sources may occur at

different times.

This appendix includes the results of refined acute assessments performed for

facilities that exceeded short-term health benchmarks using the HEM-3 approach. The

refinements can address both areas of cons ervatism described above. The simplest

refinement is to plot the HEM- 3 polar grid results on aerial ph otographs of the facilities.

This allows the assessment of off-site loca tions that may be accessible to the public ( e.g.,

roadways and public buildings.). In cases wh ere this refinement results in lower acute

risks no further refinement was conducted. The attached figures present the estimated

hazard quotient values (the modeled 1-hour c oncentration of a pollu tant divided by its

short-term health benchmark) at the polar recepto rs near the facilities. Each set of figures

is prefaced with a descripti on of the maximum off-site hazard quotient value and where

that value occurs. Refer to below for a brief summary;

PEPOs Source Category:

• 54039NEIWV0390005 * 

# ; maximum offsite acute HQ (REL) 

# for glycol ethers of 6 to

the north of the facility on 1 st 

# Avenue South

• 22089NEILA13809 * 

# ; maximum offsite acute HQ (REL) 

# for acrolein of 4, southeast

of the facility. Acute MIR for the source category.

• 48245NEI12483; maximum offsite acute HQ (REL) 

# chlorine of 2, southeast of the

facility on Hogaboom Road and nor th of the facility on Hwy 366.

# PR4ABS Source Category:

 

# 26111NEI11906; maximum offsite acute HQ (REL) 

# for acetaldehyde of 2; east of

facility on South Sagnaw Road.

PAI Source Category:

• 54039NEIWV0390007; maximum offsite acute HQ (REL) 

# for arsenic compounds of

80; intersection of 1 st 

# Avenue South and Goff Mountain Road.

• 01097NEI8596 * 

# ; maximum offsite acute HQ (REL) 

# for phosgene of 4; southwest

of the plant on Roger Phillips Road.

• 54039NEIWV0390007; maximum offsite acute HQ (REL) 

# for ethylene glycol ethyl

ether of 8; to the west of facility on 1 st 

# Avenue South Road.

• 54039NEIWV0390007; maximum offsite acute HQ (REL) 

# for acrolein of 4;

intersection of 1 st 

# Avenue South and Goff Mountain Road.

• 54039NEIWV0390007; maximum offsite acute HQ (REL) 

# for nickel compounds of

2; intersection of 1 st 

# Avenue South and Goff Mountain Road.

• 26111NEI11906; chloroform acute HQ (REL) 

# less than or equal to 2, north of the

facility

• 48201NEI7211; maximum offsite acute HQ (REL) 

# for chlorine of 2 to the southeast

of facility

• 19139NEI12233; maximum offsite acute HQ (REL) 

# for formaldehyde of 2; south of

facility

PR4PET Source Category:

• 45063NEI41393 * 

# ; maximum offsite acute HQ (REL) 

# for acetaldehyde of 8 and a

HQ (ERPG-1) 

# of 1, southeast of the facility

• 45031NEI43310; maximum offsite HQ (REL) 

# acetaldehyde of 20, south of the

facility

• 54053NEI43309 * 

# ; maximum offsite acute HQ (REL) 

# for acetaldehyde of 6 to the

southeast of facility

• 47037NEI45591; maximum offsite acute HQ (REL) 

# acetaldehyde of 7, southwest of

the facility on Old Hickory blvd.

• 45041NEI41302; maximum offsite acute HQ (REL) 

# for acetaldehyde of 6 to the

north of the facility on East Palmetto Street

• 45015NEI2SC00089; maximum offsite acute HQ (REL) 

# for acetaldehyde of 3 to the

south of facility on Cypress Gardens Road

• 01103NEI8510; maximum offsite acute HQ (REL) 

# for acetaldehyde of 3 to the north

of the facility

• 45083NEI41468; maximum offsite acute HQ (REL) 

# for acetaldehyde of 3 to the

west of facility

• 45045NEISC120000; maximum offsite acute HQ (REL) 

# for acetaldehyde of 3; west

of facility

*-- Denotes facilities that utiliz ed an acute multiplier =2 vs 10Chemical Sector Facilities - PEPOS(Refined Acute Risk Assessment )(RefinedAcuteRiskAssessment)• Figure 1– 54039NEIWV0390005*; maximumoffsite acute HQ(REL)for glycol ethers of 6 to theoffsiteacuteHQ(REL)forglycolethersof6tothenorth of the facility on 1stAvenue South• Figure 2 – 22089NEILA13809*; maximum offsitet HQf l i f 4 th t f thacue(REL)for acrolein of4, southeastofthefacility. Acute MIR for the source category.• Figure 3–48245NEI12483;maximum offsiteacute HQ(REL)chlorine of 2, southeast of the facilityon Hogaboom Road and north of the facility onHwy 366.Hwy366.*(Denotes facilities that utilized anacute hourly multiplier = 2 vs 10)Chemical Sector Facilities – PR4ABS(Refined Acute Risk Assessment )(RefinedAcuteRiskAssessment)• Figure 4–26111NEI11906; maximum offsite acuteHQ(REL)for acetaldehyde of 2; east of facility onSouth Sagnaw Road.Chemical Sector Facilities – PAI(Refined Acute Risk Assessment )(RefinedAcuteRiskAssessment)• Figure 5 – 54039NEIWV0390007; maximumoffsite acute HQ(REL)for arsenic compounds of80; intersection of 1stAvenue South and GoffMountain Road.•Figure 601097NEI8596*;maximum offsite•Figure6–01097NEI8596maximumoffsiteacute HQ(REL)for phosgene of 4; southwest ofthe plant on Roger Phillips Road.• Figure 7–54039NEIWV0390007; maximumoffsite acute HQ(REL)for ethylene glycol ethylether of 8; to the west of facility on 1stAvenueetherof8;tothewestoffacilityon1South Road.• Figure 8 – 54039NEIWV0390007; maximumoffsite acute HQfor acrolein of 4; intersectionoffsiteacuteHQ(REL)foracroleinof4;intersectionof 1stAvenue South and Goff Mountain Road.*(Denotes facilities that utilized anacute hourly multiplier = 2 vs 10)Chemical Sector Facilities – PAI(Refined Acute Risk Assessment )(RefinedAcuteRiskAssessment)• Figure 9–54039NEIWV0390007; maximumoffsite acute HQ(REL)for nickel compounds of 2;intersection of 1stAvenue South and GoffMountain Road.• Figure 10 – 26111NEI11906; chloroform acuteHQ(REL)less than or equal to 2, north of the facilityFi 1148201NEI7211 i ff it t•gure11-48201NEI7211; maximum offsite acuteHQ(REL)for chlorine of 2 to the southeast of facility• Figure12 - 19139NEI12233;maximumoffsitee39 33; a u o s teacute HQ(REL)for formaldehyde of 2; south offacilityChemical Sector Facilities – PR4PET(Refined Acute Risk Assessment )(RefinedAcuteRiskAssessment)• Figure 13 – 45063NEI41393*; maximum offsiteacute HQfor acetaldehyde of 8acuteHQ(REL)foracetaldehydeof8.• Figure 14 - 45031NEI43310; maximum offsiteHQ(REL)acetaldehyde of 20, south of the facilityy• Figure 15 – 54053NEI43309*; maximum offsiteacute HQ(REL)for acetaldehyde of 6 to thesoutheast of facilitysoutheastoffacility• Figure 16 -- 47037NEI45591; not part of thesource category, maximum offsite acute HQ(REL)acetaldeh de less than 1 after adj stment ofacetaldehydelessthan1afteradjustmentofemissions inventory*(Denotes facilities that utilized anacute hourly multiplier = 2 vs 10)Chemical Sector Facilities–PR4PET(Refined Acute Risk Assessment))• Figure 17 – 45041NEI41302; maximum offsiteacute HQ(REL)for acetaldehyde of 6 to the north ofh f ili E P l S( )thefacility onEastPalmettoStreet• Figure 18 - 45015NEI2SC00089; maximum offsiteacute HQ(REL)for acetaldehyde of 3 to the south ofacuteHQforacetaldehydeof3tothesouthoffacility on Cypress Gardens Road• Figure 19 – 01103NEI8510; maximum offsite acuteHQfor acetaldehyde of 3 to the north of the(REL)foracetaldehydeof3tothenorthofthefacility• Figure 20 -- 45083NEI41468;maximum offsiteacute HQ(REL)for acetaldehyde of 3 to the west offacilityChemical Sector Facilities – PR4PET(Refined Acute Risk Assessment )(RefinedAcuteRiskAssessment)• Figure 21–45045NEISC120000; maximum offsiteacute HQ(REL)for acetaldehyde of 3; west of facilityChemical Sector Facilities – PR4MBS(Refined Acute Risk Assessment )(RefinedAcuteRiskAssessment)• Figure 22 – 01097NEI43296; maximum offsiteacute HQ(ERPG-1)for ethyl acrylate of 9; north offacilityFigure 1 – 54039NEIWV0390005*Acute Glycol ethers HQ (REL)Figure 2 – 22089NEILA13809*Acute Acrolein HQ (REL)Figure 3 – 48245NEI12483 Acute Chlorine HQ (REL)Figure 4 – 26111NEI11906 Acute Acetaldehyde HQ (REL)Figure 5 – 54039NEIWV0390007 Acute Arsenic Compounds HQ (REL)Figure 6 – 01097NEI8596 Acute Phosgene HQ (REL)Figure 7 – 54039NEIWV0390007 Acute Ethylene glycol ethyl ether HQ (REL)Figure 8 – 54039NEIWV0390007 Acute Acrolein HQ (REL)Figure 9 – 54039NEIWV0390007 Acute Nickel Compounds HQ (REL)Figure 10 – 26111NEI11906 Acute Chloroform HQ (REL)Figure 11 – 48201NEI7211 Acute Chlorine HQ (REL)Figure 12 – 19139NEI12233 Acute Formaldehyde HQ (REL)Figure 13 – 45063NEI41393 Acute Acetaldehyde HQ (REL)Figure 14 – 45031NEI43310 Acute Acetaldehyde HQ (REL)Figure 15 – 54053NEI43309 Acute Acetaldehyde HQ (REL)Figure 16 – 47037NEI45591 Acute Acetaldehyde HQ (REL)Figure 17 – 45041NEI41302 Acute Acetaldehyde HQ (REL)Figure 18 – 45015NEI2SC00089 Acute Acetaldehyde HQ (REL)Figure 19 – 01103NEI8510 Acute Acetaldehyde HQ (REL)Figure 20– 45083NEI41468 Acute Acetaldehyde HQ (REL)Figure 21 – 45045NEISC120000 Acute Acetaldehyde HQ (REL)Figure 22 –01097NEI43296 Acute Ethyl Acrylate HQ (ERPG-1)