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Source

Type of Lab

Method of data collection

Result
Pounds/year
(lb/yr)

From

Estimate

Of What

#labs or fume hoods needed to emit 25 tpy

Stanford University BCQ

Academic, basic science and medical research

Interviews with researchers, reviews of purchase records, tracer gas studies

1456 lb/yr

7 buildings, 243 laboratories

0.024 lb/day/lab

Cal Air Toxics
SB 2588

8300 labs

Univ of Cal, Santa Cruz

Academic, basic science

Interviews with researchers, purchase records review

300 lb/yr

300 labs, 1000 researchers, 250,000 ft2 lab space

0.004 lb/day/lab

Cal Air Toxics
SB 2588

50,000 labs

Purdue University

Academic, basic science

Emission factor based on BP applied to chemical use data

7670 lb/yr

346 fume hoods

0.061 lb/hood/day

VOCs

3300 hoods

Univ of Cal, San Diego

Academic, basic science, medical research

Emissions factor applied by local APCD to chemical inventory.

3670 lb/yr

1000 labs

0.015 lb/day/lab

Cal Air Toxics
SB 2588

13,300 labs

Univ of Arizona

Academic, basic science

Questionnaire, statistical analysis to develop emission factor based on material balance

16,400 lb/yr

942 labs

0.07 lb/day/lab

HAPs

2900 labs

Univ of Cal, San Francisco

Academic, basic science, medical research

Stack sampling

1040 lb/yr

560 fume hoods

0.007 lb/day/hood

Cal Air Toxics
SB 2588

28,600 hoods

Lawrence Livermore Nat. Laboratories

DOE research facility

Mass Balance

1320 lb/yr

600 labs and some non-lab sources

0.009 lb/day/lab

Cal Air Toxics
SB 2588

22,200 labs

Roche Bioscience, Palo Alto, CA

Pharmaceutical, organic chemistry

Annual use times emission factor, emission factor developed by process simulation

5068 lb/yr

Lab = 4 researchers, assume 4 hoods per lab

0.181 lb/day/hood

Benzene, CCL₄, CCL₃H, dioxane, HCOH, and DCM

1105 hoods

Roche Bioscience, Palo Alto, CA

Pharmaceutical, analytical chemistry

Annual use times emission factor, emission factor developed by process simulation

275 lb/yr

Lab = 4 researchers, assume 2 hoods per lab

0.031 lb/day/hood

Benzene, CCL₄, CCL₃H, dioxane, HCOH, and DCM

6452 hoods

Roche Bioscience, Palo Alto, CA

Pharmaceutical, molecular biology

Annual use times emission factor, emission factor developed by process simulation

76 lb/yr

Lab = 4 researchers, assume 2 hoods per lab

0.004 lb/day/hood

Benzene, CCL₄, CCL₃H, dioxane, HCOH, and DCM

50,000 hoods

Hoffman LaRoche, NJ

Pharmaceutical

Fume hood exhaust stack sampling

&nsbp

0.22 lb/day/hood

VOCs

900 hoods

Eli Lilly

Pharmaceutical

Fume hood exhaust stack sampling

&nsbp

0.061 lb/day.hood

VOCs

3300 hoods

Roche, NJ

Pharmaceutical

Fume hood exhaust stack sampling

&nsbp

0.22 lb/day/hood

VOCs

900 hoods

Univ of Cal, San Francisco: Parnassus Campus

Academic Pharmacy

Fume hood exhaust stack sampling

9.71 x 10^-5 lb/day/ft²

300 ft² lab

.029 lb/day/lab

30 VOC species

4700
300 ft² labs

Boehringer, CT

Pharmaceutical

Mass Balancing

8,000 lb/year

160 hoods

0.2 lb/day/hood

VOCs

1,000 hoods