Gerdau Ameristeel Sayreville, Inc. Sayreville, NJ

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1 Gerdau Ameristeel Sayreville, Inc. Sayreville, NJ Evaluation of Ambient PM Measurements 04 June 2009 Mark Garrison & Susan Angyal ERM

2 About ERM Environmental Resources Management (ERM) is the world's leading provider of environmental, health and safety, risk and social consulting services with over 145 offices in 41 countries, and with a strong presence in New Jersey ERM s NJ Branch Manager serves as vice chairman of the NJ Clean Air Council, an advisory panel to the NJDEP Commissioner on clean air policy, whose members are gubernatorial appointees ERM actively participates in Industrial Stakeholder Meetings and is routinely asked by NJDEP management to provide advice and input regarding NJDEP s air quality permitting program s functions, structure, policies, and challenges Page 2

3 ERM Project Team Mark Garrison: Lead air quality modeling expert for ERM in North America Over 30 years of experience as a meteorologist and air quality dispersion modeler, including 8 years at U.S. EPA Region III Extensive experience in the evaluation of meteorological data, the application of air quality models to assess releases of criteria and toxic air pollutants, & evaluation of ambient air measurements Selected by the U.S. EPA to participate as a peer reviewer of new air quality models that are now incorporated into EPA s Guideline on Air Quality Models Page 3

4 ERM Project Team Susan Angyal: ERM Air Practice Leader for the MidAtlantic Region including NJ, PA, DE, MD, VA & WV Professional chemical engineer with over 14 years experience, including experience in preparation and review of air permits, analysis of State-of-the-Art air emission controls, and risk assessments for toxic pollutants Previously employed by NJDEP Bureau of Preconstruction Permits, serving as lead permit review engineer for the iron & steel industry sector Previously engineer for the USEPA Office of Air Quality Planning and Standards responsible for developing national air toxics emission standards Page 4

5 ERM Review & Data Assessment Understanding CAP goals: Identify dust sources originating from the Mill Institute measures to mitigate/minimize dust from those sources Status to date: Air monitoring data has been collected for one year and a health consultation has been completed by NJDHSS. These efforts have demonstrated that health effects should not be a concern Many dust control measures have been implemented New strategies for achieving and tracking progress are needed Page 5

6 ERM Review & Data Assessment (cont) On-going process Background materials reviewed to-date Review of site operations Review of air monitoring data Preliminary overview of air emissions data from regional sources Page 6

7 Analysis Tools and Approaches Focus on what s happening during the time periods when TSP/metals are being measured Meteorology (wind data and precipitation) Mill Operations Correlation of TSP with metals, calcium & PM2.5 Ratios of metals to TSP Page 7

8 Historical Data look-back Atmosphere is a complex system; our data review looks for overall trends and relationships Illustrations include overview of winds and ambient air concentration data Some days indicate likely Mill impact; some days indicate significant contribution from (unknown) non-mill regional sources Three example days follow: Blue arrows show predominant wind direction; TSP concentration is shown on each plot Page 8

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12 Update on Current Measurements Update since last CAP report Northeast TSP sampler was temporarily inoperable due to equipment malfunction; sampler has been repaired and is back in service TSP concentrations have been relatively low Max. 24 hr concentration was 65 (SW); 43 (Residential) micrograms/cubic meter (ug/m 3 ); Compare to NJ 24 hr primary standard of 260 ug/m 3 Page 12

13 Update on Current Measurements (cont) Metals have been generally within range of previous measurements; one high day of lead concentration at SW monitor (0.98 ug/m 3 ) occurred on April 15, 2009 Mill was not operating; Compare to NJ reference concentration of 0.1 ug/m 3 (24 hr) and National Ambient Air Quality Standard (NAAQS) of 0.15 ug/m 3 (3 month average) PM2.5 concentrations have also been relatively low Max. 24-hr concentrations were 18 (SW), 15 (Residential), 23 (NE) in ug/m 3 ; Compare to the NAAQS of 35 ug/m 3 Page 13

14 Next Steps Continue analysis of historical and current air quality data goal is to better understand why monitoring results do not reflect the Mill s enhanced dust control measures implemented over the past year and reduced Mill operation Continue to evaluate Mill operations for potential additional sources to control Continue evaluation and characterization of regional sources as potential contributors Page 14