Development of an Area Source Emissions Inventory for Ciudad Jurez

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Development of an Area SourceEmissions Inventory
for Ciudad Juárez

• Presented to
• the Joint Advisory Committee
• Presented by
• Karla Hardison Victor Valenzuela, TCEQ
• Paula Fields, ERG
• Carl Snow, IEI
• Ciudad Juárez, Chihuahua, Mexico
• June 19, 2003

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Roles and Responsibilities
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Area Source Inventory Objectives

• Update previous emissions inventory and GIS
  database to 2002
• Focus on area sources
• Increase knowledge of small industrial sources
• Conduct surveys to support bottom up methods
• Supplement other Mexico inventories
• Mexico NEI
• Paso del Norte Study

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Area Source Inventory Scope

• Base year 2002
• Geographic area Municipality of Cd. Juárez
• Pollutants
• NOx, SO2, CO, VOC, PM10, PM2.5, NH3
• Temporal resolution
• Annual (tons/year),
• Ozone season daily (May-Oct) (lbs/day)
• Spatial resolution
• Actual (industries)
• Area wide (traditional area sources)

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Sources Included in Inventory and Survey
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Sources Included in Inventory but not in Survey
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Sources not Included in Inventory
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Presentation Overview

• Survey Methodology and Results
• Inventory Methodology and Results
• Conclusions
• Recommendations
• Next Steps

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Survey Development

• Started with 1996 GIS database of sources
• Telephone screened by IMIP to identify sources
  active in 2002 and cooperative
• Quantified total population
• Randomly selected 20 of population
• Developed survey forms based on methods to
  estimate emissions (Activity x EF)

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Survey Implementation

• Letters from Cd. Juarez Ecología to industry
  groups paved the way
• Survey by Cd. Juarez Ecología and IMIP staff were
  key to success
• Follow-up visits and calls completed the effort

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Survey Conclusions

• gt20 of most categories were surveyed
• Least cooperation from industries
• Most cooperation from services
• Significant reluctance to provide production
  information
• Important to train survey staff

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Inventory Development

• Handwritten survey forms typed (Spanish)
• QA of typed forms
• Typed forms entered into Access database
  (English)
• QA of data entry
• Tables exported to spreadsheets for calculations
• QA of calculations

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Emissions Methodology -Sources Surveyed

• Activity data X emission factors
• 2. Extrapolation to entire population in Phase II

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Emissions Methodology Activity Data

• Preferred activity data
• Equipment/process level (daily, weekly, monthly)
• Alternative activity data
• Plant level (annual)
• Our activity data has range of coverage, quality
• 67 of LPG, foundries (4/6 facilities) no data
• Remaining 81 facilities (not including 73
  vendors)
• 70 with plant-level data
• 30 with equipment- and/or process-level data

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Emissions Methodology Other Sources Not Surveyed

• SAGARPA data for agricultural sources
• Mexico NEI methods, data (INEGI, PEMEX, etc)
• Paved/unpaved roads (IMIP)
• Structural fires
• Commercial/institutional/residential fuel
  combustion
• Consumer solvents, domestic NH3,
• El Paso/URS report for brick kilns
• IMIP GIS data for areas (wind erosion,
  construction )

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Inventory Conclusions

• First ever area source survey of multiple sources
• Good identification of facilities, processes,
  equipment
• Limited data on production forced general methods
  to be used for 70 of industries
• Revised (improved?) estimates for sources not
  surveyed-- fugitive dust, brick kilns

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Overall Recommendations

• Implement strategy to update inventory
• Assess value of surveying area sources based on
• Significance of source categories to overall
  inventory
• Focus on ozone, PM, visibility
• Increase surveyed
• Examine supplemental data collection (e.g.,
  mailing questionnaires)
• Train surveyors on inventory methods
• Educate trade associations on benefits of
  participation
• Incorporate future changes to estimation methods
  for unpaved roads, wind erosion

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Next Steps

• Finalize emissions and report by 7/30/03
• Phase II (w/Paso del Norte Environ. Group)
• Ground-proof location information
• Update GIS base map
• Integrate emissions data from sources surveyed
• Extrapolate emissions to entire population
• Develop gridded inventory by August 31, 2003

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• Thank you for your attention!
• Questions?

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