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Trial #6

Trial #6

To compare exposure levels for Enviro Caddie and traditional spray paint.

2002

10

4

4

4

Coupon

07/11/2002

0.00

Low Pressure Spray

Jason Marshall

Other

Paints
Solvent

None

None

Drager Tubes

A 12" x 12" x 12" Acrylic Spray Chamber lined with paper towels was used to contain paint sprayed. Background levels for organic vapor were measured using an OVM, Thermo Environmental Instruments,Inc - Model 580 B. Dragger tubes were used to measure for Acetone, Ethyl Benzene, Toulene & Xylene. Paint was sprayed for 10 seconds into the acrylic chamber. A reading was taken with the OVM at T = 0, at T = 10 seconds and then when level (T ~ 2 minutes). The OVM reading was repeated for each of the 4 Dragger tube measurements. Paper towels were changed between spraying in order to reduce residual vapors. Temperature and humidity were recorded to be 78.2 F and 38%.

The Enviro Caddie measurements for the Drager tubes for the four compounds resulted in levels exceeding the capabilities of the tubes. The results are listed in the table below.

Background Readings

Temperature 78.2  
Humidity 38%  
Date: July 12, 2002  
Exposure Evaluation 1  
Measurement Location:   Spray Chamber 12" x 12" x 12"
  Acrylic lined with paper towels
  3.5" x 4.5" opening in top of chamber for spraying
  (2) 1/4 " holes for tubing and Dragger tubes, 1" from opening
Time: 10 sec EC  
Analysis Method OVM, Thermo Environmental Instruments,Inc - Model 580 B
  Dragger tubes for Acetone, Ethyl Benzene, Toulene & Xylene
   
   
  Background
OVM  0.9 ppm
Acetone No Color Change
Ethyle Benzene No Color Change
Toulene No Color Change
Xylene No Color Change
   
  Enviro Caddie
OVM  
initial (max) 508 ppm
10 sec 300 ppm
level 265 ppm
Acetone        10 pumps > 1200 ppm
OVM  
initial (max) 1064 ppm
10 sec 272 ppm
level 255 ppm
Ethyl Benzene   6 pumps > 600 ppm
OVM  
initial (max) 1096 ppm
10 sec 309 ppm
level 309 ppm
Toulene           5 pumps     > 400 ppm
OVM  
initial (max) 1063 ppm
10 sec 242 ppm
level 232 ppm
Xylene             5 pumps > 400 ppm 
1 pump over max  
   
Process Paint was sprayed for 10 seconds into the acrylic chamber
  A reading was taken  with the OVM initially (max reading), at 10 seconds and then when level
  This was done for each of the 4 Dragger tubes
  Paper towels were changed between spraying in order to get a fresh reading

Due to the levels recorded for the Enviro Caddie exposure at 10 seconds, the testing was stopped and rescheduled for a latter date using a lower spray delivery time (Reduced from 10 to 2 seconds). The traditional spray system will also be evaluated at the 2 second spray time.

No relation

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