HAZARDOUS ATMOSPHERE ESTIMATION ARNOLD FERGUSON CIH CSP PE

HAZARDOUS ATMOSPHERE ESTIMATION ARNOLD FERGUSON, CIH, CSP, PE Industrial Hygienist NFO/ AMSO/ North Las Vegas, NV 89030 arnold. ferguson@nnsa. doe. gov 702 295 0844

LEARNING OBJECTIVES: • Understand “hazardous atmosphere” • Understand the uses and limitations of the spreadsheet • Become familiar with sources of information for spreadsheet • How to input data into spreadsheet • How to interpret results of spreadsheet ARNOLD FERGUSON, CIH, CSP, PE 702 295 0844

PRIMARY USES OF SPREADSHEET A. Determine if confined space contains a “hazardous atmosphere” B. Determine ventilation requirements to control a “hazardous atmosphere” C. Determine if modification of usage rate would negate a “hazardous atmosphere” D. Determine respiratory protection needs in a confined space or for new product E. Estimate exposure concentration (odor, new product, etc) ARNOLD FERGUSON, CIH, CSP, PE 702 295 0844

PERTINENT REGULATIONS A. Respiratory Protection 29 CFR 1910. 134(d)(1)(iii) … Where the employer cannot identify or reasonably estimate the employee exposure, the employer shall consider the atmosphere to be IDLH. ARNOLD FERGUSON, CIH, CSP, PE 702 295 0844

PERTINENT REGULATIONS B. Confined Space 29 CFR 1910. 146(b) [Definitions] "Hazardous atmosphere" means an atmosphere that may expose employees to the risk of death, incapacitation, impairment of ability to self rescue (that is, escape unaided from a permit space), injury, or acute illness from one or more of the following causes: (1) Flammable gas, vapor, or mist in excess of 10 percent of its lower flammable limit (LFL); … (4) Atmospheric concentration … which could result in employee exposure in excess of its dose or permissible exposure limit; NOTE: An atmospheric concentration of any substance that is not capable of causing death, incapacitation, impairment of ability to self rescue, injury, or acute illness due to its health effects is not covered by this provision. . . ARNOLD FERGUSON, CIH, CSP, PE 702 295 0844

PERTINENT INFORMATION C. OSHA Letter of Interpretation 03/26/1999 for 29 CFR 1910. 146(b) …an atmosphere that contains a substance at a concentration exceeding a permissible exposure limit intended solely to prevent long-term adverse health effects is not considered to be a hazardous atmosphere on that basis alone. Therefore, if the atmosphere is above the PEL, then it would not automatically be classified as a "hazardous atmosphere". ARNOLD FERGUSON, CIH, CSP, PE 702 295 0844

ASSUMPTIONS • • • Flash evaporation of liquids is worst case. Confined space does not have any contaminants leeching into atmosphere Previous air sampling data would override estimate from spreadsheet Application rate and ventilation rate would be over same time frame and uniform Ventilation is a control for a “hazardous atmosphere, ” not elimination. Chemical mixtures have additive effects for determination of IDLH Chemicals without an OEL, LEL or IDLH are not included in the spreadsheet Lower Explosive Limit is the same as Lower Flammable Limit Vapors have uniform mixing in the space. ARNOLD FERGUSON, CIH, CSP, PE 702 295 0844

LIMITATIONS • Not for use in previously contaminated environments • Not for particulates, inorganics, or organic compounds that act as particulates for sampling (specifically diisocyantes) REQUIREMENT • NO, but it may be a valuable tool RECOMMENDATION • For QA, manually perform calculations at least once to validate spreadsheet ARNOLD FERGUSON, CIH, CSP, PE 702 295 0844

SOURCES OF INFORMATION • Activity using the chemicals 1. Product to be used by Manufacturer and Part # and amount of each Part 2. Application rate • Facility Blueprints 1. Dimensions of space 2. Dimensions of any large object in space ARNOLD FERGUSON, CIH, CSP, PE 702 295 0844

SOURCES OF INFORMATION • Safety Data Sheets 1. Organic chemicals in Product 2. Weight fraction of chemical in Product (use higher weight fraction) 3. Density or Specific Gravity of Product • NIOSH Pocket Guide 1. Molecular weight of each chemical 2. LEL of each chemical 3. IDLH of each chemical ARNOLD FERGUSON, CIH, CSP, PE 702 295 0844

SOURCES OF INFORMATION • Internet o Search for chemicals not shown in Pocket Guide for possible LEL or IDLH (for example: benzyl alcohol, CAS 100 51 6, LEL= 1. 3% from Fxxxxx Sxxxxxxx and MW = 108. 1) • OSHA PEL / ACGIH TLV o Applicable OEL ARNOLD FERGUSON, CIH, CSP, PE 702 295 0844

PRINCIPAL FORMULAS: • Determination of Immediately Dangerous to Life or Health (IDLH) from chemical concentrations (C) or Exceedance of Occupational Exposure Limit (OEL) _ C 1__ + _C 2__ + _C 3__ + … _Cn__ L 1 L 2 L 3 Ln Li = IDLHi or OELi ARNOLD FERGUSON, CIH, CSP, PE 702 295 0844 < 1 , ACCEPTABLE

PRINCIPAL FORMULAS: • Determination of Lower Explosive Limit (LEL) for mixture (m) using weight fractions (f) LELm = ___________1____________ f 1 + f 2 + f 3 + … + fn ( LEL 1 LEL 2 LEL 3 ARNOLD FERGUSON, CIH, CSP, PE 702 295 0844 LELn )

PRINCIPAL FORMULAS: • Density Weight/gallon = (8. 33 x Specific Gravity) • Conversion formulas ppm = ( mg/m 3 x 24. 45) / MW mg/m 3 = (ppm x MW)/ 24. 45 ARNOLD FERGUSON, CIH, CSP, PE 702 295 0844

HAZARDOUS ATMOSPHERE ESTIMATION SPREADSHEET FERGUSON'S AIRBORNE CHEMICAL HAZARD ESTIMATION WEIGHT PERCENT LOCATION: NAVAL BASE OPERATION: SPRAYING EPOXY PAINT Product A and B with Thinner WITHOUT VENTILATION Volume Length (ft) Width (ft) Height (ft) Diameter (ft) cubic feet Volume 20 20 10 0 4000 JOB NO: Volume of Obstruction (ft 3) 0 XYZ Supply Vent CFM 1 lb = 454 g 1 g = 1000 mg 1 oz = 1/128 gal Ventilation Time (minutes) Volume (ft 3) 0 0 Effective Volume (ft 3) 4000 Effective Volume (m 3) 112. 8 ppm = mg/m 3(24. 45/MW) density of H 2 O = 8. 33 lb/gal Wt/gal = 8. 33 * Specific Gravity NOTES: a. For cylinders, use length and diameter (put 0 in non used blocks). b. Obtain chemical, weight of paint per gallon, Specific Gravity (S. G. ), and weight % (normally the higher % even if exceed 100%) from MSDS. Use either S. G. or weight. c. Obtain Molecular Weight (MW), Lower Explosive Limit (LEL), and Immediately Dangerous to Life and Health (IDLH) limit from NIOSH Pocket Guide to Chemical Hazards Multiply %LEL from Pocket Guide by 1000 to get 10% LEL in ppm or by 0. 1 to get 10%LEL. Use table at right to convert from % to ppm. (for example, ethyl benzene has a 1. 2%LEL. Multiply by 0. 1 to get 0. 12%LEL. From table, 0. 12%LEL is 1200 ppm. ) For chemicals not listed in the Pocket Guide, check internet for MSDS for specific chemical's LEL or IDLH level. If a component does not have an established LEL or IDLH, enter 0 in MW and N. E. in 10%LEL and IDLH columns. d. Assumes flash evaporation as a worst case. Previous sample data should override these calculations if for similar operation. e. Enter the amount in one of 4 columns to determine total gallons. The amount should be the quantity of concern (normally per day/shift or per hour). The time frame needs to be the same as for ventilation. f. Obstruction would be a tank or similar item inside confined space that would occupy a significant volume. g. Columns with YELLOW heading require input in order to be included in calculations. Rows with PINK shading are available for calculations without expanding the matrix. h. Ventilation is the continuous forced air for the space to aid in controlling the gas or vapor. The use of ventilation does not eliminate the hazardous atmosphere, but controls it. i. Per OSHA definition of hazardous atmosphere, the level cannot be IDLH or impede self rescue without ventilation. If not a hazardous atmosphere, space might not be permit confined space. j. Calculations for %LEL of mixture use LEL of each chemical, not 10% LEL, even though 10% LEL entered. k. Calculations for gas and vapor, not particulates. Quantity of Material to be Used Coating Component Product A Product B Thinner 1 Component Ounces 0 0 0 Quarts 0 0 0 Liters 0 0 0 Gallons 0. 7 0. 14 Coating Product A Chemical XYLENE Mol. Weight 106. 2 Quantity (Gal) 0. 7 Weight/Gal 12. 2451 Product A A B B ETHYL BENZENE 112 -24 -3 MIBK XYLENE 106. 2 146. 2 100. 2 106. 2 0. 7 Product Thinner B 1 1 ETHYL BENZENE MIBK XYLENE 106. 2 100. 2 106. 2 Thinner 0 0 0 1 ETHYL BENZENE 106. 2 0 0 0 Total Gallons 0. 7 0. 14 0 0 Weight/Gal 0 0 0 Weight % Specifc Gravity Weight/Gal 1. 47 12. 2451 1. 62 13. 4946 0. 83 6. 9139 0 0 1191 900 Product. A 1034. 9 344. 9 3801. 9 1900. 9 238 57 927 437 800 700 1200 900 800 0 500 900 Product. A Product. B 34748. 46 41856. 85 49177. 91 39092. 02 0. 3674 0. 1225 1. 3495 0. 6747 0. 0113 0. 0038 0. 0413 0. 0207 42885 219723 380. 1 1947. 8 87 475 448 800 1200 900 800 500 900 Product. B Thinner 1 34748. 46 49177. 91 39092. 02 0. 1349 3. 4570 43944 0 0 0 389. 5 0 0 0 89 0 0 0 3949 800 0 0 0 Thinner 1 0 0 0 34748. 46 0. 00 0. 6914 0. 0000 %LEL mix = 39. 97 mg chemical 583723 mg/m 3 5174. 8 12. 2451 13. 4946 3 1 10 5 116744 38914 428858 214429 0. 7 0. 14 13. 4946 6. 9139 1 50 50 0. 14 0 0 0 6. 9139 0 0 0 10 Total ppm 10% LEL IDLH Comments of Operation: mix ratio 1 A: 1 B with up to 10% reducer. LEL of 0. 7% for Triethylene Tetraamine, 112 -24 -3, from Fxxxxx Sxxxxx MSDS Txxx-1 FOR 60% solution. Other ingredients in Product did not have IDLH or %LEL established. Ingredients without IDLH and %LEL were not included in calculations. NOT Acceptable since IDLH would be potentially exceeded without ventilation. Calculations Perfomed by: Name: TTTT W. LLLL CONTRACT #: 1000000= 100000= 10 10000= 1 1000= 0. 1 100= 0. 01 0. 7 0. 14 0 0 SUM= LEL (mg/m 3) 39092. 02 15 Product. A Product. B Thinner 1 ppm % Signature: ___________________ DATE: 00/00/0000 Job XYZ ARNOLD FERGUSON, CIH, CSP, PE 702 295 0844 562. 8 = 12. 2451 13. 4946 6. 9139 0 0 32. 6536 Amt chemical 1. 8368 WT % MIX 0. 0563 AMT/LEL 1. 43891 E-06 %SUM ppm/IDLH (If less than or = 100, IDLH not exceeded) 1/SUM Chemical % 0. 1469886 ppm/IDLH 1. 32333333 3. 23755 E-07 8. 95911 E-08 8. 40347 E-07 5. 2858 E-07 0. 02939772 0. 00711819 0. 11445818 0. 05399581 0. 2975 0 1. 854 0. 48555556 0. 0041 0. 1059 1. 18931 E-07 2. 15274 E-06 2. 70816 E-06 0. 01079916 0. 29321078 0. 27664521 0. 10875 0. 95 0. 49777778 0. 0212 0. 0000 SUM = 6. 09335 E-07 0 0 0 8. 81035 E-06 0. 05532905 0 0. 9879 0. 11125 0 0 0 5. 62816667 113502. 84

SPACE INFORMATION FERGUSON'S AIRBORNE CHEMICAL HAZARD ESTIMATION WEIGHT PERCENT JOB NO: XYZ LOCATION: NAVAL BASE OPERATION: SPRAYING EPOXY PAINT Product A and B with Thinner WITHOUT VENTILATION Volume Length (ft) 20 Width (ft) 20 Supply Volume of Ventilation Effective Diameter Obstruction Time Volume Height (ft) cubic feet (ft 3) CFM (minutes) (ft 3) (m 3) 10 0 4000 112. 8 ARNOLD FERGUSON, CIH, CSP, PE 702 295 0844

NOTES: a. For cylinders, use length and diameter (put 0 in non used blocks). b. Obtain chemical, weight of paint per gallon, Specific Gravity (S. G. ), and weight % (normally the higher % even if exceed 100%) from MSDS. Use either S. G. or weight. c. Obtain Molecular Weight (MW), Lower Explosive Limit (LEL), and Immediately Dangerous to Life and Health (IDLH) limit from NIOSH Pocket Guide to Chemical Hazards Multiply %LEL from Pocket Guide by 1000 to get 10% LEL in ppm or by 0. 1 to get 10%LEL. Use table at right to convert from % to ppm. (for example, ethyl benzene has a 1. 2%LEL. Multiply by 0. 1 to get 0. 12%LEL. From table, 0. 12%LEL is 1200 ppm. ) For chemicals not listed in the Pocket Guide, check internet for MSDS for specific chemical's LEL or IDLH level. If a component does not have an established LEL or IDLH, enter 0 in MW and N. E. in 10%LEL and IDLH columns. d. Assumes flash evaporation as a worst case. Previous sample data should override these calculations if for similar operation. e. Enter the amount in one of 4 columns to determine total gallons. The amount should be the quantity of concern (normally per day/shift or per hour). The time frame needs to be the same as for ventilation. f. Obstruction would be a tank or similar item inside confined space that would occupy a significant volume. g. Columns with YELLOW heading require input in order to be included in calculations. Rows with PINK shading are available for calculations without expanding the matrix. h. Ventilation is the continuous forced air for the space to aid in controlling the gas or vapor. The use of ventilation does not eliminate the hazardous atmosphere, but controls it. i. Per OSHA definition of hazardous atmosphere, the level cannot be IDLH or impede self rescue without ventilation. If not a hazardous atmosphere, space might not be permit confined space. j. Calculations for %LEL of mixture use LEL of each chemical, not 10% LEL, even though 10% LEL entered. k. Calculations for gas and vapor, not particulates. ARNOLD FERGUSON, CIH, CSP, PE 702 295 0844

PRODUCT INFORMATION Quantity of Material to be Used Coating Component Product Thinner A B 1 Ounces Quarts Liters Gallons Total Gallons 0 0 0 0 0. 7 0. 14 0 0 0 0 ARNOLD FERGUSON, CIH, CSP, PE 702 295 0844 Specifc Weight/Gal Gravity 0 0 0 Weight/Gal 1. 47 1. 62 0. 83 12. 2451 13. 4946 6. 9139 0 0

INGREDIENT INFORMATION Coating Component Product A Product A A B B Product B Thinner 1 0 0 0 Chemical XYLENE ETHYL BENZENE 112 -24 -3 MIBK XYLENE ETHYL BENZENE Mol. Weight Quantity (Gal) Weight/Gal Weight % mg chemical mg/m 3 ppm 10% LEL IDLH 106. 2 0. 7 12. 2451 15 583723 5174. 8 1191 900 106. 2 146. 2 100. 2 106. 2 0. 7 12. 2451 13. 4946 3 1 10 5 116744 38914 428858 214429 1034. 9 344. 9 3801. 9 1900. 9 238 57 927 437 800 700 1200 900 800 0 500 900 106. 2 100. 2 106. 2 0. 7 0. 14 13. 4946 6. 9139 1 50 50 42885 219723 380. 1 1947. 8 87 475 448 800 1200 900 800 500 900 106. 2 0. 14 6. 9139 10 43944 389. 5 89 800 0 0 0 0 0 0 ARNOLD FERGUSON, CIH, CSP, PE 702 295 0844

COMMENTS Comments of Operation: mix ratio 1 A: 1 B with up to 10% reducer. LEL of 0. 7% for Triethylene Tetraamine, 112 24 3, from Fxxxxx Sxxxxx MSDS Txxx 1 FOR 60% solution. Other ingredients in Product did not have IDLH or %LEL established. Ingredients without IDLH and %LEL were not included in calculations. NOT Acceptable since IDLH would be potentially exceeded without ventilation. ARNOLD FERGUSON, CIH, CSP, PE 702 295 0844

GIVEN for demonstration of the Chemical Hazard Estimation • Painting all surfaces of a newly constructed underground vault with access by a ladder • The vault is 20 ft long, 20 ft wide, and 10 ft wide (1600 ft 2 surface area) • Product XYZ will be used with 1 part A to 1 part B (by volume) • The coverage rate is 1152 ft 2/ gallon, which equates to 1. 4 gallons of Product XYZ needed. • Up to 10 % reducer (or thinner) can be used ARNOLD FERGUSON, CIH, CSP, PE 702 295 0844

INFORMATION FOR DEMONSTRATION • From SDS for Product A, B, AND C A. Hazardous ingredients and percentage by weight B. Weight per gallon (or specific gravity) • From NIOSH Pocket Guide for each hazardous ingredient A. IDLH B. LEL C. Molecular Weight • From the Internet for one potential hazardous ingredient A. IDLH B. LEL C. Molecular Weight ARNOLD FERGUSON, CIH, CSP, PE 702 295 0844

SAFETY DATA SHEET – PRODUCT A Section 3. Composition/information on ingredients Ingredient name Titanium Dioxide Methylstyrenated Phenolic Resin Xylene Polyamide Ethylbenzene Triethylene Tetramine % by weight ≥ 25 <50 ≥ 10 <25 CAS number 13463 67 7 68512 30 1 ≥ 10 <15 ≥ 5 <10 ≥ 2 <3 ≥ 0. 3 <1 1330 20 7 68410 23 1 100 41 4 112 24 3 ARNOLD FERGUSON, CIH, CSP, PE 702 295 0844

SAFETY DATA SHEET – PRODUCT A Section 9. Physical and chemical properties Vapor pressure 0. 13 k. Pa (0. 946 mm Hg) [at 20°C] Vapor density 3. 66 [Air = 1] Relative density 1. 47 ARNOLD FERGUSON, CIH, CSP, PE 702 295 0844

SAFETY DATA SHEET – PRODUCT B Section 3. Composition/information on ingredients Ingredient name % by weight CAS number Epoxy Polymer ≥ 10 - <25 25085 -99 -8 Epoxy Polymer ≥ 10 - <25 61788 -97 -4 Methyl Isobutyl Ketone ≥ 5 - <10 108 -10 -1 Xylene ≥ 4 - <5 1330 -20 -7 Ethylbenzene ≥ 0. 3 - <1 100 -41 -4 ARNOLD FERGUSON, CIH, CSP, PE 702 295 0844

SAFETY DATA SHEET – PRODUCT B Section 9. Physical and chemical properties Vapor pressure 0. 28 k. Pa (2. 133 mm Hg) [at 20°C] Vapor density 3. 45 [Air = 1] Relative density 1. 62 ARNOLD FERGUSON, CIH, CSP, PE 702 295 0844

SAFETY DATA SHEET – THINNER Section 3. Composition/information on ingredients Ingredient name % by weight CAS number Methyl Isobutyl Ketone ≥ 25 - <50 108 -10 -1 Xylene ≥ 25 - <50 1330 -20 -7 Ethylbenzene ≥ 5 - <10 100 -41 -4 ARNOLD FERGUSON, CIH, CSP, PE 702 295 0844

SAFETY DATA SHEET – THINNER Section 9. Physical and chemical properties Vapor pressure 0. 28 k. Pa (2. 133 mm Hg) [at 20°C] Vapor density 3. 45 [Air = 1] Relative density 0. 83 ARNOLD FERGUSON, CIH, CSP, PE 702 295 0844

NIOSH Pocket Guide to Chemical Hazards Ethyl benzene CAS No. RTECS No. DOT ID & Guide 100 41 4 DA 0700000 1175 130 Formula Conversion IDLH CH 3 CH 2 C 6 H 5 1 ppm = 4. 34 mg/m 3 800 ppm [10%LEL] Measurement Methods Exposure Limits. NIOSH REL : TWA 100 ppm (435 mg/m 3) ST 125 ppm (545 mg/m 3)OSHA PEL †: TWA 100 ppm (435 mg/m 3) NIOSH 1501 ; OSHA 7 , 1002 MW: BP: FRZ: Sol: VP: IP: 106. 2 277°F 139°F 0. 01% 7 mm. Hg 8. 76 e. V Sp. Gr: Fl. P: UEL: LEL: 0. 87 55°F 6. 7% 0. 8% ARNOLD FERGUSON, CIH, CSP, PE 702 295 0844

INGREDIENT INFORMATION FOR DEMONSTRATION NAME/ CAS # IDLH (ppm) LEL (%) MW (g/gmole) OEL (ppm) Methyl Isobutyl Ketone/ 108 -10 -1 500 1. 2 100. 2 20 Xylene /95 -47 -6 900 0. 9 106. 2 100 Ethyl Benzene/ 100 -41 -4 800 0. 8 106. 2 20 Triethylenetetraamine/ 112 -24 -3 N. E. 1. 1 146. 2 N. E. Information for 112 -24 -3 from Internet ARNOLD FERGUSON, CIH, CSP, PE NBHC CRANE, IN

HAZARDOUS ATMOSPHERE ESTIMATION – No Ventilation 1. 4 Gallons FERGUSON'S AIRBORNE CHEMICAL HAZARD ESTIMATION WEIGHT PERCENT LOCATION: NAVAL BASE OPERATION: SPRAYING EPOXY PAINT Product A and B with Thinner WITHOUT VENTILATION Volume Length (ft) Width (ft) Height (ft) Diameter (ft) cubic feet Volume 20 20 10 0 4000 JOB NO: Volume of Obstruction (ft 3) 0 XYZ Supply Vent CFM 1 lb = 454 g 1 g = 1000 mg 1 oz = 1/128 gal Ventilation Time (minutes) Volume (ft 3) 0 0 Effective Volume (ft 3) 4000 Effective Volume (m 3) 112. 8 ppm = mg/m 3(24. 45/MW) density of H 2 O = 8. 33 lb/gal Wt/gal = 8. 33 * Specific Gravity NOTES: a. For cylinders, use length and diameter (put 0 in non used blocks). b. Obtain chemical, weight of paint per gallon, Specific Gravity (S. G. ), and weight % (normally the higher % even if exceed 100%) from MSDS. Use either S. G. or weight. c. Obtain Molecular Weight (MW), Lower Explosive Limit (LEL), and Immediately Dangerous to Life and Health (IDLH) limit from NIOSH Pocket Guide to Chemical Hazards Multiply %LEL from Pocket Guide by 1000 to get 10% LEL in ppm or by 0. 1 to get 10%LEL. Use table at right to convert from % to ppm. (for example, ethyl benzene has a 1. 2%LEL. Multiply by 0. 1 to get 0. 12%LEL. From table, 0. 12%LEL is 1200 ppm. ) For chemicals not listed in the Pocket Guide, check internet for MSDS for specific chemical's LEL or IDLH level. If a component does not have an established LEL or IDLH, enter 0 in MW and N. E. in 10%LEL and IDLH columns. d. Assumes flash evaporation as a worst case. Previous sample data should override these calculations if for similar operation. e. Enter the amount in one of 4 columns to determine total gallons. The amount should be the quantity of concern (normally per day/shift or per hour). The time frame needs to be the same as for ventilation. f. Obstruction would be a tank or similar item inside confined space that would occupy a significant volume. g. Columns with YELLOW heading require input in order to be included in calculations. Rows with PINK shading are available for calculations without expanding the matrix. h. Ventilation is the continuous forced air for the space to aid in controlling the gas or vapor. The use of ventilation does not eliminate the hazardous atmosphere, but controls it. i. Per OSHA definition of hazardous atmosphere, the level cannot be IDLH or impede self rescue without ventilation. If not a hazardous atmosphere, space might not be permit confined space. j. Calculations for %LEL of mixture use LEL of each chemical, not 10% LEL, even though 10% LEL entered. k. Calculations for gas and vapor, not particulates. Quantity of Material to be Used Coating Component Product A Product B Thinner 1 Component Ounces 0 0 0 Quarts 0 0 0 Liters 0 0 0 Gallons 0. 7 0. 14 Coating Product A Chemical XYLENE Mol. Weight 106. 2 Quantity (Gal) 0. 7 Weight/Gal 12. 2451 Product A A B B ETHYL BENZENE 112 -24 -3 MIBK XYLENE 106. 2 146. 2 100. 2 106. 2 0. 7 Product Thinner B 1 1 ETHYL BENZENE MIBK XYLENE 106. 2 100. 2 106. 2 Thinner 0 0 0 1 ETHYL BENZENE 106. 2 0 0 0 Total Gallons 0. 7 0. 14 0 0 Weight/Gal 0 0 0 Weight % Specifc Gravity Weight/Gal 1. 47 12. 2451 1. 62 13. 4946 0. 83 6. 9139 0 0 1191 900 Product. A 1034. 9 344. 9 3801. 9 1900. 9 238 57 927 437 800 700 1200 900 800 0 500 900 Product. A Product. B 34748. 46 41856. 85 49177. 91 39092. 02 0. 3674 0. 1225 1. 3495 0. 6747 0. 0113 0. 0038 0. 0413 0. 0207 42885 219723 380. 1 1947. 8 87 475 448 800 1200 900 800 500 900 Product. B Thinner 1 34748. 46 49177. 91 39092. 02 0. 1349 3. 4570 43944 0 0 0 389. 5 0 0 0 89 0 0 0 3949 800 0 0 0 Thinner 1 0 0 0 34748. 46 0. 00 0. 6914 0. 0000 %LEL mix = 39. 97 mg chemical 583723 mg/m 3 5174. 8 12. 2451 13. 4946 3 1 10 5 116744 38914 428858 214429 0. 7 0. 14 13. 4946 6. 9139 1 50 50 0. 14 0 0 0 6. 9139 0 0 0 10 Total ppm 10% LEL IDLH 562. 8 = Comments of Operation: mix ratio 1 A: 1 B with up to 10% reducer. LEL of 0. 7% for Triethylene Tetraamine, 112 -24 -3, from Fxxxxx Sxxxxx MSDS ACC 24040 FOR 100% solution. Other ingredients in Product did not have IDLH or %LEL established. Ingredients without IDLH and %LEL were not included in calculations. NOT Acceptable since IDLH AND 10%% LELwould be potentially exceeded without ventilation. Calculations Perfomed by: Name: TTTT W. LLLL CONTRACT #: 1000000= 100000= 10 10000= 1 1000= 0. 1 100= 0. 01 0. 7 0. 14 0 0 SUM= LEL (mg/m 3) 39092. 02 15 Product. A Product. B Thinner 1 ppm % Signature: ___________________ DATE: 00/00/0000 Job XYZ ARNOLD FERGUSON, CIH, CSP, PE 702 295 0844 12. 2451 13. 4946 6. 9139 0 0 32. 6536 Amt chemical 1. 8368 WT % MIX 0. 0563 AMT/LEL 1. 43891 E-06 %SUM ppm/IDLH (If less than or = 100, IDLH not exceeded) 1/SUM Chemical % 0. 1469886 ppm/IDLH 1. 32333333 3. 23755 E-07 8. 95911 E-08 8. 40347 E-07 5. 2858 E-07 0. 02939772 0. 00711819 0. 11445818 0. 05399581 0. 2975 0 1. 854 0. 48555556 0. 0041 0. 1059 1. 18931 E-07 2. 15274 E-06 2. 70816 E-06 0. 01079916 0. 29321078 0. 27664521 0. 10875 0. 95 0. 49777778 0. 0212 0. 0000 SUM = 6. 09335 E-07 0 0 0 8. 81035 E-06 0. 05532905 0 0. 9879 0. 11125 0 0 0 5. 62816667 113502. 84

ESTIMATION WITH NO VENTILATION AND 1. 4 GALLONS Coating Product Component Chemical A XYLENE ppm 10% LEL 1191 900 IDLH Product A A B B ETHYL BENZENE 112 24 3 MIBK XYLENE 238 57 927 437 800 700 1200 900 800 0 500 900 Product Thinner B 1 1 ETHYL BENZENE MIBK XYLENE 87 475 448 800 1200 900 800 500 900 Thinner 1 ETHYL BENZENE 89 3949 800 %LEL mix = 39. 97 900 = %SUM ppm/IDLH (If less than 562. 8 or = 100, IDLH not exceeded) Comments of Operation: mix ratio 1 A: 1 B with up to 10% reducer. LEL of 0. 7% for Triethylene Tetraamine, 112 24 3, from Fxxxxx Sxxxxx MSDS ACC 24040 FOR 100% solution. Other ingredients in Product did not have IDLH or %LEL established. Ingredients without IDLH and %LEL were not included in calculations. NOT Acceptable since IDLH and 10% LEL would be potentially exceeded without ventilation. ARNOLD FERGUSON, CIH, CSP, PE 702 295 0844

ESTIMATION WITH NO VENTILATION AND 0. 7 GALLONS Coating Product Component Chemical A XYLENE ppm 10% LEL 900 595 Product A A B B ETHYL BENZENE 112 24 3 MIBK XYLENE 119 Product Thinner B 1 1 ETHYL BENZENE MIBK XYLENE 43 237 Thinner 1 ETHYL BENZENE IDLH 900 800 700 1200 900 800 0 500 900 224 800 1200 900 800 500 900 44 800 19. 95 281 28 463 218 1971 %LEL mix = = %SUM ppm/IDLH (If less than or = 100, IDLH not exceeded) Comments of Operation: mix ratio 1 A: 1 B with up to 10% reducer. LEL of 0. 7% for Triethylene Tetraamine, 112 24 3, from Fisher Scientific MSDS ACC 24040 FOR 100% solution. Other ingredients in Product did not have IDLH or %LEL established. Ingredients without IDLH and %LEL were not included in calculations. NOT Acceptable since IDLH and 10% LEL would be potentially exceeded without ventilation. ARNOLD FERGUSON, CIH, CSP, PE 702 295 0844

ESTIMATION WITH 100 CFM FOR 240 MIN AND 0. 7 GALLONS FERGUSON'S AIRBORNE CHEMICAL HAZARD ESTIMATION WEIGHT PERCENT JOB NO: XYZ LOCATION: NAVAL BASE OPERATION: SPRAYING EPOXY PAINT Product A and B with Thinner WITHOUT VENTILATION Supply Ventilatio Ventilat Volume of Vent n ion Effective Length Diameter Obstruction Time Volume (ft) Width (ft) Height (ft) cubic feet (ft 3) CFM (minutes) (ft 3) (m 3) Volume 20 20 10 0 4000 0 100 24000 28000 789. 6 ARNOLD FERGUSON, CIH, CSP, PE 702 295 0844

ESTIMATION WITH 100 CFM FOR 240 MIN AND 0. 7 GALLONS Coating Product Component Chemical A XYLENE ppm 10% LEL 900 170 Product A A B B ETHYL BENZENE 112 24 3 MIBK XYLENE Product Thinner B 1 1 ETHYL BENZENE MIBK XYLENE 12 Thinner 1 ETHYL BENZENE IDLH 900 800 700 1200 900 800 0 500 900 64 800 1200 900 800 500 900 12 800 5. 67 79. 9 34 8 132 62 67 1971 %LEL mix = = %SUM ppm/IDLH (If less than or = 100, IDLH not exceeded) Comments of Operation: mix ratio 1 A: 1 B with up to 10% reducer. LEL of 0. 7% for Triethylene Tetraamine, 112 24 3, from Fisher Scientific MSDS ACC 24040 FOR 100% solution. Other ingredients in Product did not have IDLH or %LEL established. Ingredients without IDLH and %LEL were not included in calculations. Acceptable since 10 %LEL and IDLH would not be potentially exceeded with 100 CFM ventilation, but it is considered a Permit Confined Space with Forced Air sufficient to maintain space safe for entry. ARNOLD FERGUSON, CIH, CSP, PE 702 295 0844

ANOTHER USE ODOR Given: • Maintenance bay: About 500’ long x 50’ wide x 40’ high • Obstructions on one side of Bay (used width of 33’) • Individual had odor/medical complaint about 300’ from and 20’ above paint application • 72 ounces of DTM paint used over 30 minutes with no thinner Odor Thresholds from 3 M 2003 Respirator Selection Guide ETHYL BENZENE TRIMETHYL BENZENE (124 TMB) METHYL-n-AMYL KETONE (M-n-AK) t-BUTYL ACETATE ARNOLD FERGUSON, CIH, CSP, PE 702 295 0844 23 ppm 2. 4 ppm 0. 14 ppm

ANOTHER USE GENERAL INFORMATION FERGUSON'S AIRBORNE CHEMICAL HAZARD ESTIMATION WEIGHT PERCENT JOB NO: GXPL Transportable Target Launcher (TTL) LOCATION: NAVAL BASE Crane, B 41, C Bay OPERATION: Rolling Sherwin Williams Envirolastic 840 DTM High Gloss Urethane on TTL (touch up) Supply Ventilatio Volume of Vent TIME n Effective Diameter Obstruction Volume Length (ft) Width (ft) Height (ft) cubic feet (ft 3) CFM (minutes) (ft 3) (m 3) Volume 500 33 20 0 330000 9306 ARNOLD FERGUSON, CIH, CSP, PE 702 295 0844

ANOTHER USE PRODUCT INFORMATION Quantity of Material to be Used Coating Component Ounces B 65 B 840 A 48 B 65 V 840 B 24 Quarts 0 0 Liters 0 0 ARNOLD FERGUSON, CIH, CSP, PE 702 295 0844 Gallons 0 0 Total Gallons 0. 375 0. 1875 Weight/Gal 8. 8

ANOTHER USE INGREDIENT INFORMATION Coating B 65 B 840 B 65 V 840 Component A A B Chemical ETHYL BENZENE 124 TMB M n AK T Butyl Acetate Mol. Weight 106. 2 120. 2 114. 2 116. 2 ARNOLD FERGUSON, CIH, CSP, PE 702 295 0844 Quantity (Gal) 0. 375 0. 1875 Weight/Gal 8. 8 8. 8 Weight % 0. 1 2 8 28 15

ANOTHER USE ESTIMATION OF EXPOSURE Chemical TWA (ppm) ETHYL BENZENE 0 124 TMB 0. 0375 Mn. AK 0. 16875 T Butyl Acetate 0. 5875 T Butyl Acetate 0. 15625 OEL (ppm) 20 25 50 200 Total %OEL= % OEL 0 0. 15 0. 3375 0. 29375 0. 078125 ARNOLD FERGUSON, CIH, CSP, PE 702 295 0844 0. 8 ODOR (ppm) 23 2. 4 0. 14 4 4

ANOTHER USE COMMENTS Comments of Operation: mix ratio 2 A: 1 B. . From D. Terrell, GXPL, 4 mixes of 18 oz used in 30 minutes for total operation. Operation occurred in mid January 2016. Other ingredients in Sherwin Williams 840 DTM Part A (B 65 B 840)and Part B (B 65 V 840) did not have IDLH, %LEL or OEL established for the vapor, except diisocyanates. Diisocyanates from Part A have an extremely low vapor pressure and react with compounds from Part B or water vapor (near 100%). Ingredients without IDLH and %LEL were not included in calculations. Acceptable since IDLH, 10% LEL, and OEL would not be potentially exceeded without ventilation. Respiratory Protection is not required. ARNOLD FERGUSON, CIH, CSP, PE 702 295 0844

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