1. Harris County Public Health and Environmental Services Pollution Control Division Air Monitoring Activities Bob Allen 713-920-2831 rpallen@harriscountyhealth.com

2. Overview:  Who we are?  Existing air monitoring activities -Fixed ozone monitors -Neighborhood screening -Nuisance odor complaint summa canister sampling  Future air monitoring program elements  Where do we go from here?

3. Who we are  Local enforcement agency for Harris County since 1953. Merged with HCPHES (Harris County Health Department) in 1998  Enforce TCEQ air, water, solid waste rules and the Harris County Storm Water regulations  24 hour complaint response  Civil and criminal enforcement

4. Harris County’s Public Health Ozone Monitoring System When and Why:  Started 2002, 12 sites added to the regional Network  Data and notification more proximate to more citizens, health professionals, coaches and hospitals  Fill gaps in system in populated areas for modeling and animation purposes

5. Harris County’s Public Health Monitoring Network (con’t) How:  Locate ozone monitors in existing public buildings  SEP funding $250,000 for equipment  Installation, administration, calibration, and maintenance funded by Harris County  Data to existing TCEQ database for public access and email notifications ( http://ozone.hcoem.org) http://ozone.hcoem.org

6. Harris County Public Health Ozone Monitoring Network

7. Neighborhood Screening  Pilot program initiated January 2005  Use Hapsite - portable GC/MS  Survey neighborhoods closest to petrochemical facilities and industrial sources  Survey sites also include nuisance odor complaint database input  Emergency Response neighborhood screening, i.e. fires, explosions

8. Nuisance Odor Complaint Summa Canister Sampling Program  Summa canister sample collected as part of some nuisance odor investigations  Odor must be present at the time investigation is conducted  Inherent transient nature of nuisance odors is a complicating factor  Links enforcement with health impacts

10. Sample results (ppbv) CompoundSumma Canister HapsiteTCEQ Short/Long term ESL (2003) Benzene.12-8.42.12-3.5925/1 Toluene.25-5.15.10-1.69500/50 1,2,4 Trimethylbenzene.10-.62.10-2.29250/25 Ethyl Benzene.14-.73.10-1.95460/46 Xylenes.15-.86.10-3.52850/85 1,3,5Trimethylbenzene.26.69-5.21250/25 Styrene.85-33360(Odor) 25/2.5 Chloroform420/2

11. Future Air Monitoring Program Elements  Fourier Transform Infrared System( FTIR) Fixed station located in Pasadena. Near real-time reporting of HRVOCs and secondary target list of compounds including some air toxics. Data available to TCEQ network and available to the community with the TCEQ website  Summa Canister Pre-concentrator System Enhanced air toxics and HRVOC analysis capability  Co -located Met. towers Currently one, two to be added

12. Where do we go from here?  Goal–reduce industrial odor complaints  Institutionalize neighborhood screening and odor driven summa canister pilot programs  Improve data analysis of both in-house and TCEQ data  Better coordination with City of Houston BAQC and TCEQ, Region 12 and Austin