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AASHTO T 199-00 Standard Method of Test for Air Content of Freshly Mixed Conc…
Standard Specifications for Transportation Materials and Method of Sampling and Testing Part 2A: Tests 24th Edition
A measurements of particulate lead on the M4 motorway at Harlington
TRRL LR 626: The average lead levels found in the centre of the motorway in dry weather in the autumn of 1972 were 20.6 g/m3 for the period 07.00 to 19.00 hours and 15.1 g/m3 for the 24 hour period on weekdays. The driver of a vehicle was found to be exposed to three quarters of the lead levels found in the motorway atmosphere. Lead in the atmosphere and in the surface soil fall off rapidly…
Atmospheric pollution measurements in West London (1973)
Trrl Lr 709 The atmospheric concentrations of carbon monoxide, hydrocarbons and nitric oxide were measured at three sites in West London. The sites were at distances ranging up to 50m from a permanent atmospheric pollution measuring station at the kerbside of a busy road. The data obtained show that the pollutants measured at the remote sites were principally produced by the traffic in the m…
Measurement of particulate lead on the M4 motorway at Harlington, Middlesex
The concentration of particulate lead in the atmosphere in the central reserve of the M4 motorway at Harlington was measured continously over the period 1 March 1973 to 27 May 1975 in order to determine the long term trends and any seasonal fluctuations in the levels. The lead content of the air was shown to have decreased by 7 per cent per annum and a seasonal cycle existed which could be attr…
