SUPPLEMENTAL MATERIALS. for. Exposure Assessment in Auto Collision Repair Shops

Transcription

1 SUPPLEMENTAL MATERIALS for Exposure Assessment in Auto Collision Repair Shops Anca Bejan, Lisa M. Brosseau, and David L. Parker Journal of Occupational and Environmental Hygiene Vol. 8, Issue 7, 2011

2 Employee feedback on seven hearing band models HP model, manufacturer and NRR Cool Cap (Moldex 6508) NRR= 22 QB1HYG (Howard Leight) NRR= 27 Reflex (EAR) NRR= 25 Sphere (EAR) NRR= 28 Ultraflex (EAR) NRR= 27 QB2HYG (Howard Leight) NRR= 25 Gel Caps (Elvex) NRR= 23 # of testers How long did you wear this model? 3 hours 3 days (1) hours (1) minutes (1) 2 hours (1) days (1) 4 hours (3) days (1) 3 days (1) hours (1) minutes (1) 2 minutes (1) hours (1) How comfortable were the earplugs? A comfortable (2) uncomfortable (1) a little uncomfortable (1) uncomfortable (2) comfortable comfortable uncomfortable How easy was it to put them in? A easy (1) difficult (2) easy (1) sort of difficult (1) How easy was it to store them? A easy (1) sort of easy Did they interfere with other equipment? A Did they provide a good seal? A (2) (2) Was the headband sturdy? A (2) uncomfortable easy easy 2 minutes uncomfortable easy A Number of testers who made this choice is shown in parentheses. easy (1) (2) Would you wear these earplugs again? A (2) (2) (3)

3 Example of HP feedback card Assessment form for Model : Cool cap green band- green foam tips Moldex How long did you wear this model? a few minutes a few hours a few days 2. How comfortable were these earplugs comfortable uncomfortable 3. How easy was it to put on these earplugs? easy sort of easy difficult 4. How easy was it to store these earplugs when you weren t wearing them? easy sort of easy difficult 5. Did these earplugs interfere with other equipment you use? Yes No 6. Did these earplugs provide a good seal? Yes No 7. Was the headband sturdy? Yes No 8. What did you like best about these earplugs? 9. What didn t you like about these earplugs? 10. Would you wear these earplugs again? Yes No

4 Tool for selecting the solvents to be analyzed for area samples Percentage present by weight (%) Vapor pressure (mm Hg) < < 10 mm Hg A mm Hg A A A mm Hg A A A mm Hg A A A A mm Hg A A A A > 140 mm Hg A A A A A

5 Degreasing compounds: MSDS and sample information Shop Degreaser product MSDS info Samples will be analyzed for: 1 Sikkens M 600 Surface cleaner (# ) hydrotreated light naphtha 55 65% aliphatic hydrocarbon % petroleum hydrocarbon 5 10% ethyl acetate. 5 10% xylene, mixed isomers.1 5% ethyl benzene 0.1 1% 2 Du Pont First Klean 3900 S 1,2,4-trimethyl benzene(8%*), 1,3,5-trimethyl benzene, 2,2,4-trimethylpentane(1%@), Aromatic hydrocarbon-b, Heptane, Isopropyl alcohol, Medium mineral spirits, Toluene(1%*@), Vm&p naphtha 3 Standox Hydrotreated heavy naphtha (petroleum) Propal, 1(or2)-ethoxy- 4 Montana TH 5950 Acetone 5-10%, Mineral Spirits Xylene (27%) Naptha A reporting limit: 40µg/sample; result reported as n-hexane B reporting limit: 1µg/sample C reporting limit: 1µg/sample Degreasing method THC A Surface was sprayed 2 or 3 times and wiped with lintfree cloth THC 1, 2, 4 trimethyl benzene B THC THC xylene C Surface was wiped 1 time with a pre-wet paper towel Surface was sprayed 1 time and wiped with a lint-free cloth Surface was sprayed 1 time and wiped with a lint-free cloth Sample duration (minutes) and concentration (ppm)) 18 min 160 ppm 16 min.320 ppm 15 min.150 ppm 19 min ND and ND 15 min ND and ND 43 min.nd and ND 15 min..nd 17 min.nd and ND 15 min.nd and ND

6 Degreasing operations additional information Shop Surfaces degreased Location and Ventilation status 1 2 bumpers, 1 hood and 2 fenders Shop floor (all from small cars) No additional ventilation Degreasing method Surface was sprayed 3 times and wiped with lint-free cloth Sample duration (minutes) and concentration (ppm)) + analyte 16 min; THC A : 320 ppm Right side of a pick-up truck cargo area Prep station Same as above 15 min; THC: 150 ppm Truck doors and rocker panel Painting booth (doors open) No additional ventilation Surface was sprayed 2 times and wiped with lint-free cloth 18 min; THC: 160 ppm 2 2 doors, 1 fender, 1 quarter back panel, 1 rocker panel Shop floor No additional ventilation Surface was wiped 1 time with a pre-wet paper towel 15 min; 1, 2, 4 trimethylebenzene B : ND 2 doors, 1 fender, 1 quarter panel Shop floor No additional ventilation All components on 2 SUV sides + 1 side of a small car Paint booth 3 All components of 2 SUV sides Shop floor Same as above Same as above Surface was sprayed 1 time and wiped with a lint-free cloth 19 min; 1, 2, 4 trimethylebenzene: ND 43 min; 1, 2, 4 trimethylebenzene: ND 15 min; 4 2 doors Paint booth 1 fender, 1 bumper, 1 metal accent piece Paint booth A reporting limit: 40µg/sample; result reported as n-hexane Surface was sprayed 1 time and wiped with a lint-free cloth Same as above 15 min; Xylene C : ND 17 min; Xylene: ND B reporting limit: 1µg/sample C reporting limit: 1µg/sample

7 Excerpt from the discussion with AssayTech lab manager, Steve Greene (all references to the shop names were removed) From: Rena Kirkpatrick Sent: Wednesday, December 10, :51 PM To: Bejan, Anca Subject: FW: liquid solvents analysis Dear Anca, Please see the te from my Lab Manager after he reviewed the chromatograms for your samples. Happy Holidays, Rena Rena K. Kirkpatrick Director of Sales, Marketing & Technical Support Assay Techlogy, Inc 1252 Quarry Lane Pleasanton, CA fax: phone: Toll-Free: , x Original Message----- From: Steve Green Sent: Tuesday, December 09, :21 PM To: Subject: RE: liquid solvents analysis Rena, Looking at the raw data, I think it's safe to say there aren't significant amounts of the Montana TH 5950 r the Standox The Montana TH 5950 has a significant amount of Acetone in it that I don't see on the samples. The Standox has heavy naphtha and the chemicals I see are t very heavy. I'd be surprised if there was much DuPont First Klean 3900 S since the Isopropyl Alcohol is missing. IPA would have been an easy one to collect and spot because it's pretty volatile. The Sikkens M 600 Surface cleaner looks much more likely. The sample chromatograms show ethyl acetate, xylenes, ethyl benzene, along with other fairly light hydrocarbons. [..] Steve

8 Image from the paint mixing room that returned the highest styrene and acetone concentrations mini lid- size of a dime Open containers with soaking parts