Keywords: LOS ANGELES REACTIVE POLLUTANT PROGRAM (LARPP), A UNIQUE MULTI-AGENCY AIR POLLUTION RESEARCH STUDY SPONSORED BY THE... - NARA - 552372.jpg LOS ANGELES REACTIVE POLLUTANT PROGRAM LARPP ” A UNIQUE MULTI-AGENCY AIR POLLUTION RESEARCH STUDY SPONSORED BY THE COORDINATING RESEARCH COUNCIL A GOVERNMENT-INDUSTRY RESEARCH GROUP Scope and content LOS ANGELES REACTIVE POLLUTANT PROGRAM LARPP A UNIQUE MULTI-AGENCY AIR POLLUTION RESEARCH STUDY SPONSORED BY THE COORDINATING RESEARCH COUNCIL A GOVERNMENT-INDUSTRY RESEARCH GROUP USED IN THE PROJECT ARE THERMASONDES WEATHER-TESTING BALLOONS TETROONS AIRBORNE BUOYS USED TO MARK OFF GIVEN SECTIONS OF AIR FOR STUDY AND EPA HELICOPTERS FOR TRACING AND TAKING SAMPLES GROUND LEVEL SAMPLES ARE ALSO TAKEN INFORMATION IS TRANSMITTED BY RADAR FLYING IN A SQUARE PATTERN AROUND CENTROID OF THE TRIANGLE MADE BY THE TETROONS HELICOPTER PASSES TETROON IN MIDAIR TETROONS ARE MADE OF CLEAR PLASTIC AND FILLED WITH HELIUM THEY MEASURE ABOUT 6 OR 7 FEET IN HEIGHT IT IS RARELY THAT A HELICOPTER PASSES AS CLOSE TO A TETROON AS THIS General notes 552372 Local identifier 412-DA-9887 Environmental Protection Agency 12/02/1970 - NARA-Author Daniels Gene photographer Photographer 8463941 <br /> Los Angeles Los Angeles county California United States North and Central America inhabited place 4219264 34 05 -118 23 <br /> Still Picture Records Section Special Media Archives Services Division NWCS-S National Archives at College Park 8601 Adelphi Road College Park MD 20740-6001 09/1973 Record group Record Group 412 Records of the Environmental Protection Agency 1944 - 2006 Record group ARC 708 DOCUMERICA The Environmental Protection Agency's Program to Photographically Document Subjects of Environmental Concern compiled 1972 - 1977 Series ARC 542493 File unit File unit ARC Variant control numbers Agency-Assigned Identifier 165/47/009887<br /> NAIL Control Number NWDNS-412-DA-9887 Other versions <gallery> File LOS_ANGELES_REACTIVE_POLLUTANT_PROGRAM_ LARPP _A_UNIQUE_MULTI-AGENCY_AIR_POLLUTION_RESEARCH_STUDY_SPONSORED_BY_THE _-_NARA_-_552372 tif tif File LOS_ANGELES_REACTIVE_POLLUTANT_PROGRAM_ LARPP _A_UNIQUE_MULTI-AGENCY_AIR_POLLUTION_RESEARCH_STUDY_SPONSORED_BY_THE _-_NARA_-_552372 jpg jpg </gallery> NARA images of California - NARA-cooperation PD-USGov Los Angeles Reactive Pollutant Program 73 Helicopters of the Environmental Protection Agency Bell 212 Tetroons 1973 in Los Angeles |