Isocyanate Comparative Sampling Method Ann Anderson – IH Tech/Ergo Rick Hurd – IH Tech/Ergo Rick Hurd – IH Tech/Ergo Arlington Assembly Plant Larry Hunt – GM Regional IH

DuPont 2K Clear Coat Paint part A (resin, solvent, additives) + part B (HDI monomer, IPDI monomer, HDI polymer, IPDI polymer, solvent, adds.) HDI polymer, IPDI polymer, solvent, adds.)______________________________ = 2 Part Polyurethane (A+B)

Common Sample Methods for Isocyanate  Impinger  Glass Fiber Filter Cassette  Asset EZ4

Midget Impingers

Isocyanate Sample Method Pros and Cons  Impinger –Inconvenient for Personal samples. –Contains liquid solution that can leak –Glass impinge may break –Least desired sample collection for employee

Filter Cassette & Parts

Isocyanate Sample Method Pros and Cons  Filter Cassettes –Easy to use in the field –Short Shelf life –Filters place in desorption container –Storage and shipping with temperature control, on ice.

Asset EZ4 Dry Sampler

Isocyanate Sample Method Pros and Cons  Asset EZ4 Dry Sampler –Denuder selection collects the vapors phase –Filter collects the aerosol particulates –Low detection limits, high capacity –Forms Stable derivatives –Low flow rate challenge to maintain pre and post calibration –Shipping: no temperature control and longer shelf life.

Sample Train for Stand for Tests

Asset Tubes & Cassettes for Isocyanate Tests

Tool to Remove Cassette Top  Cassette Wrench

Preparation to Open Cassette to Remove Filter

Cassette Filter Pad Removal

Vile for Filter from Cassette

Samples Ready to Ship

Results for Comparison Sample General Area samples inside Booth B Vestibule - - approx. 5 ft. off floor, Not a work area B booth inside vestibule. Employees not in this area. Five feet off the floor on a stand RH mg/m 3 Isophorone Diisocyanate (IPDI) (CAS# )< 0.84 ppb 5.0 ppb Methylene Bisphenyl Isocyanate (MDI) (CAS# )< 0.3 ppb 5.0 ppb Hexamethylene Diisocyanate (HDI) (CAS# )0.9 ppb 5.0 ppb RH mg/m 3 Isophorone Diisocyanate (IPDI) (CAS# ) < 0.1 ppb5.0 ppb Methylene Bisphenyl Isocyanate (MDI) (CAS# ) < 0.09 ppb5.0 ppb Hexamethylene Diisocyanate (HDI) (CAS# ) 0.94 ppb5.0 ppb General Area samples inside a Vestibule area - - approx. 5 ft off floor, Not a work area A booth inside vestibule area. Employees not in this area. Five feet off the floor on a stand RH mg/m 3 Isophorone Diisocyanate (IPDI) (CAS# )< 0.84 ppb 5.0 ppb Methylene Bisphenyl Isocyanate (MDI) (CAS# )< 0.3 ppb 5.0 ppb Hexamethylene Diisocyanate (HDI) (CAS# )< 0.45 ppb 5.0 ppb RH mg/m 3 Isophorone Diisocyanate (IPDI) (CAS# ) < 0.13 ppb5.0 ppb Methylene Bisphenyl Isocyanate (MDI) (CAS# ) < 0.12 ppb5.0 ppb Hexamethylene Diisocyanate (HDI) (CAS# ) 0.36 ppb5.0 ppb

Wentzville Assembly Sample Method

Sample at Wentzville

Calibration Pocket Pump Wentzville

Data Calibration Pocket Pump SURVEY RLH POCKET PUMP POST CAL ProductDEFENDER 510 Serial Number SampleDryCal mL/min DryCal Avg. mL/min Time :49: :49: :50: :50: :50: :50: :50: :50: :51: :51:10

Summary  Sampling with GFF Cassette –Temperature Control –No data on Total Isocyanate available  Sampling with Asset EZ4 –No temperature Requirements –Low Flow Rate challenge –Easy for Personal samples –Total Isocyanate data and detection level

Recommendation  Sample for isocyanate with the Asset method  Provide Pocket sample pumps for isocyanate testing.