Accession Number : AD0738801

Title :   Large-Scale Monitoring of Automobile Exhaust Particulates; Methods and Costs.

Descriptive Note : Final rept. Jun-Aug 71,

Corporate Author : NAVAL RESEARCH LAB WASHINGTON D C

Personal Author(s) : Birks,L. S. ; Gilfrich,J. V. ; Nagel,D. J.

Report Date : OCT 1971

Pagination or Media Count : 26

Abstract : The hypothetical problem addressed is annual monitoring of 150 million cars for exhaust particlates. Four topics are reviewed concerning the particulates: Total mass expressed in grams per mile; Particle size distribution; Elemental analysis; State of chemical combination. At present the only specification is in grams per mile but consideration is being given to particle size and to elemental analysis of known harmful constituents. Since manufacturers will not be told how to meet the specifications, a wide variety of emission control systems may be expected and along with them a wide variety of particulate compositions. (Author)

Descriptors :   (*AIR POLLUTION, EXHAUST GASES), (*EXHAUST GASES, *PASSENGER VEHICLES), MEASUREMENT, PARTICLE SIZE, CHEMICAL ANALYSIS, MONITORS, COSTS, ATOMIC SPECTROSCOPY, X RAY SPECTROSCOPY, SAMPLING, PARTICLES

Subject Categories : Surface Transportation and Equipment
      Test Facilities, Equipment and Methods
      Air Pollution and Control

Distribution Statement : APPROVED FOR PUBLIC RELEASE