Document k9z4oewnK8o1g25yE12DDxzdO

INDUSTRIAL HYGIENE REPORT File Number LAD IH 96.01 GULF COAST INDUSTRIAL HYGIENE CENTER LOUISIANA DIVISION Date Issued: 10/7/96 AN OPERATING UNIT OF THE DOW CHEMICAL COMPANY Plant Code: 1701 Title Face Velocity Readings on Fume Hoods at the Solvents/EDC Facility, Plaquemine, Louisiana. Authors Charles Douglas Reviewers Maralee Marchant Introduction An industrial hygiene ventilation survey was conducted on the fume hoods at the Solvents/EDC Facility, Building #1701, Louisiana Division, Plaquemine, Louisiana, on October 7, 1996. Face velocity measurements were taken to assess the fume hoods performance, in accordance with the surveillance plan outline in the Industrial Hygiene Program. Operating conditions during this survey were routine. Background This facility has five fume hoods that are equipped with a flow-sensing device. The fume hoods are on an every three year industrial hygiene evaluation rotation. Results and Conclusions The following conclusions were based on conditions that existed on the day of this survey. Changes in equipment, procedures, or other conditions that affect exposures could alter or invalidate these conclusions. The fume hoods met face velocity measurements needed for the service of operation. The smoke tube observation within the hoods showed no internal turbulence swirling back towards the face of the hood. Observations The average face velocity (FV) and minimum face velocity (FVm) reported in feet per minute (FPM), are as follows: Designation Lab Hood #1 Lab Hood #2 Lab Hood #3 Lab Hood #4 Lab Hood #5 Sash Opening 18" 18" 18" 18" 18" FV (FPM) 176 182 188 175 194 FVm (FPM) 136 159 139 135 176 For more detailed information on individual hood evaluation, see attachment. Recommendations Personnel should wear hearing protection while operating Lab Hood #5. The noise level has been measure above 95 dB. Engineering controls should be consider to reduce the levels within a safe range. Equipment Used The Alnor Model #8925 Thermo Anemometer, Serial #1326, was used to take face velocity measurements at specific grid locations. CONFTDFNT7A1, DO 007730 Quality Assurance The Alnor Thermo Anemometer was calibrated by the manufacturer in February 1995. A recheck for zero condition was done before and after each use acording to manufacturers' recommendation. Co/v^ ^P/vr 00 0773^ Distribution List Don Taylor, B-1701 Wayne Miller, B-1701 Graig Landry, B-1701 COMF1 OFNTTAl 00 00773? Page 3 LOUISIANA DIVISION INDUSTRIAL HYGIENE HOOD PERFORMANCE TESTING DATA PLANT: Solvents/EDC HOODI.D.: Process Lab Hood #1 DATE: October 7,1996 EVALUATED BY: Charles Douglas Static Pressure Reading L2. Hood Face Velocity Readings at a(n) 18" Sash Opening: 201 202 175 178 184 160 172 166 189 142 136 Smoke Tube Observations With a(n) 18" Sash Opening - ****MODERATE (Air capture by hood is strong and well defined with minimal internal turbulence and no observable smoke swirling back to hood face when person stands at hood face.) (FPM) (FPM) DesignationSash Hood Opening FVFVm________Classification Process Lab Hood #1 18" 176 136 "A" Used the Alnor Model 8925 Thermo Anemometer. FV = Average Face Velocity FVm = Minimum Measurement FPM = Feet Per Minute CONFJDFNTTA! DO 007733 Page 4 LOUISIANA DIVISION INDUSTRIAL HYGIENE HOOD PERFORMANCE TESTING DATA PLANT: Solvents/EDC HOOD I.D.: Process Lab Hood #2 DATE: October?, 1996 EVALUATED BY: Charles Douglas Static Pressure Reading .5 Hood Face Velocity Readings at a(n) 18" Sash Opening: 198 201 196 185 171 180 180 181 169 159 Smoke Tube Observations With a(n) 18" Sash Opening - ****MODERATE (Air capture by hood is strong and well defined with minimal internal turbulence and no observable smoke swirling back to hood face when person stands at hood face.) (FPM) (FPM) DesignationSash Hood Opening FVFVm________Classification Process Lab Hood #2 18" 182 159 "A" Used the Alnor Model 8925 Thermo Anemometer. FV = Average Face Velocity FVm = Minimum Measurement FPM = Feet Per Minute CONFIDENT! Al DO 007734 Page 5 LOUISIANA DIVISION INDUSTRIAL HYGIENE HOOD PERFORMANCE TESTING DATA PLANT: Solvents/EDC HOOD I.D.: Process Lab Hood #3 DATE: October 7,1996 EVALUATED BY: Charles Douglas Static Pressure Reading 2A- Hood Face Velocity Readings at a(n) 18" Sash Opening: 203 139 222 180 182 195 197 184 187 Smoke Tube Observations With a(n) 18" Sash Opening - ****MODERATE (Air capture by hood is strong and well defined with minimal internal turbulence and no observable smoke swirling back to hood face when person stands at hood face.) DesignationSash Hood Opening Process Lab Hood #3 18" (FPM) (FPM) FVFVm__________________Classification 188 139 "A" Used the Alnor Model 8925 Thermo Anemometer. FV = Average Face Velocity FVm = Minimum Measurement FPM = Feet Per Minute CONFIDFNT^' 00 00773R Page 6 LOUISIANA DIVISION INDUSTRIAL HYGIENE HOOD PERFORMANCE TESTING DATA PLANT: Solvents/EDC HOOD I.D.: Process Lab Hood #4 DATE: October 7, 1996 EVALUATED BY: Charles Douglas Static Pressure Reading 3.2. Hood Face Velocity Readings at a(n) 18" Sash Opening: 244 211 203 157 135 166 175 179 158 145 165 Smoke Tube Observations With a(n) 18" Sash Opening - ****MODERATE (Air capture by hood is strong and well defined with minimal internal turbulence and no observable smoke swirling back to hood face when person stands at hood face.) (FPM) (FPM) DesignationSash Hood Opening FVFVm________Classification Process Lab Hood #4 18" 175 135 "A" Used the Alnor Model 8925 Thermo Anemometer. FV = Average Face Velocity FVm = Minimum Measurement FPM = Feet Per Minute 10' 00773^ DO LOUISIANA DIVISION INDUSTRIAL HYGIENE HOOD PERFORMANCE TESTING DATA PLANT: Solvents/EDC HOOD I.D.: Process Lab Hood #5 DATE: October 7,1996 EVALUATED BY: Charles Douglas Static Pressure Reading 3.2. Hood Face Velocity Readings at a(n) 18" Sash Opening: 210 190 210 205 180 191 190 176 190 Smoke Tube Observations With a(n) 18" Sash Opening - ****MODERATE (Air capture by hood is strong and well defined with minimal internal turbulence and no observable smoke swirling back to hood face when person stands at hood face.) (FPM) (FPM) DesignationSash Hood Opening__ JEYFVm__________________ Classification Lab Hood #1 18" 194 176 "A" Used the Alnor Model 8925 Thermo Anemometer. FV = Average Face Velocity FVm = Minimum Measurement FPM = Feet Per Minute rONFTDFNTTAI DO 007737