PMID- 15758093
OWN - NLM
STAT- MEDLINE
DCOM- 20050705
LR  - 20171116
IS  - 0047-2425 (Print)
IS  - 0047-2425 (Linking)
VI  - 34
IP  - 2
DP  - 2005 Mar-Apr
TI  - Empirical relationship between use, area, and ambient air concentration of methyl 
      bromide.
PG  - 420-8
AB  - Methyl bromide (MeBr) is one of the most widely used soil fumigants. Human 
      exposure to MeBr above threshold values can cause serious health problems. The 
      exposure assessment of MeBr depends on estimation or measurement of its air 
      concentrations. This study proposed a methodology for systematically exploring 
      the empirical relationship between MeBr use intensity and ambient air 
      concentrations. Monitored air concentrations were regressed to MeBr use over 
      various spatiotemporal scales that step-wise increased around the monitoring site 
      and monitoring period. The results showed that the goodness-of-fit varied with 
      the spatiotemporal scale of MeBr use. The best fit was Y = 0.46 + 0.00120X (R2 = 
      0.95, n = 11), where Y was the 8-wk average ambient air concentration 
      (microg/m3), and X was the weekly average use (kg/wk) over an area of 11.3 x 11.3 
      km (7 x 7 mi). The model was calibrated with air-monitoring data and use data of 
      2000, and verified with the same type data of 2001. The model estimated 
      subchronic air concentration with reasonable accuracy.
FAU - Li, LinYing
AU  - Li L
AD  - California Environmental Protection Agency, Department of Pesticide Regulation, 
      Environmental Monitoring Branch, Post Office Box 4015, Sacramento, CA 95812-4015, 
      USA. lli@cdpr.ca.gov
FAU - Johnson, Bruce
AU  - Johnson B
FAU - Segawa, Randy
AU  - Segawa R
LA  - eng
PT  - Journal Article
PL  - United States
TA  - J Environ Qual
JT  - Journal of environmental quality
JID - 0330666
RN  - 0 (Air Pollutants)
RN  - 0 (Hydrocarbons, Brominated)
RN  - 0 (Soil)
RN  - 9V42E1Z7B6 (methyl bromide)
SB  - IM
MH  - Air Pollutants/*analysis
MH  - *Environmental Exposure
MH  - Environmental Monitoring
MH  - Fumigation
MH  - Hydrocarbons, Brominated/*analysis
MH  - *Models, Theoretical
MH  - Soil
EDAT- 2005/03/11 09:00
MHDA- 2005/07/06 09:00
CRDT- 2005/03/11 09:00
PHST- 2005/03/11 09:00 [pubmed]
PHST- 2005/07/06 09:00 [medline]
PHST- 2005/03/11 09:00 [entrez]
AID - 34/2/420 [pii]
PST - ppublish
SO  - J Environ Qual. 2005 Mar-Apr;34(2):420-8.