Hot Spots Analysis & Reporting Program Back To All Programs Hot Spots Analysis & Reporting ProgramAboutNewsResourcesSubscribe Primary Contact HARP Email harp@arb.ca.gov Phone (916) 324-1342 Categories Topics Airborne Toxics Division Transportation and Toxics Division Resources Emission Inventory Criteria and Guidelines Regulation Documents HARP Bulletins Information Frequently Asked Questions Related to the OEHHA Guidelines Information Risk Management Actions - workshops and meetings Information Risk Management Activities - Past Workshops and Meetings HARP Digital Elevation Model Files HARP AERMOD Meteorological Files HARP AERSCREEN Meteorological Data HARP Risk Assessment Standalone Tool HARP Air Dispersion Modeling and Risk Tool