Mobile Air Pollution Laboratory (MAPL)
The Mobile Air Pollution Laboratory (MAPL) is constructed within a Recreational Cargo Van. One wall was cleared for bench space and shelving to outfit with instrumentation. A manifold inlet was installed to provide ambient air to all benched instruments, where the instruments with the higher flow rates were furthest downstream to provide sufficient flow to minimize diffusion losses of ultrafine particles that were sampled by the respective instruments upstream. Also, only one 90-degree turn exists to prevent losses of the larger particles. All instruments in the mobile lab are designed to primarily measure particles in the PM2.5 fraction, with the exception of the Grimm, an optical particle counter that measures particle number size distributions between 0.3 and 20 nanometers. Thus, the inlet manifold was designed to minimize both diffusion and inertial deposition losses.
The MAPL is powered with eight heavy duty car batteries which are stored in a ventilated rack system, laterally housed behind the driver's and front passenger seats. The batteries are connected to a programmable inverter which allows tracking of the power consumption and available current supply, providing a power capacity of about 30-55 amps, which lasted between 10 and 15 hours, depending on the overall load. The collection of portable, continuous monitors (gases, particles) described above are available for deployment in the MAPL so the instrumentation can be customized for the particular monitoring program.
Ambient Integrated Particle Samplers
Multiple Tisch 1000 high volume PM2.5 and Anderson RAAS samplers, as well as a Thermo ChemVol that can collect size segregated samples (2.5 to 10 µm; 1.0 to 2.5 µm; 0.2 to 1.0 µm; and < 0.1 µm) on PUF collection media for the larger sizes and a filter for the ultrafines at 900 Lpm. Two 8-stage Micro-orifice uniform deposit and 1 ten-stage Micro-orifice uniform deposit impactors (MOUDIs) are available. In conjunction with the 10-stage MOUDI, there is a three stage nano-MOUDI, that permits separation of particles below 100 nm into three size fractions. Measurements can be made of both individual exposure and microenvironmental concentrations using 10 LPM personal exposure monitors (PEMs) with 2.5 μm or 10 μm cut-points. There are 23 such PM2.5 and 10 PM10 units available. These impactors can provide aerosol samples on a variety of 37 mm collection media.