A02 Description of Requirements_DUST-TRAK (TowneB).pdf

Description of Requirement

New Contract: DUST TRAK 8530 and 8533

SPECIFICATIONS: The Engineer Research and Development Center (ERDC), Geotechnical and Structures Laboratory (GSL), Mobility Systems Branch (MSB) needs sensors that can be mounted to a vehicle to collect dust measurements emitted by the vehicle as described in recent

EPA dust emission report [Mikel]. The data will be used to validate dust models used in ERDCs Virtual Autonomous Navigation Environment. MSB is requesting to purchase three DustTrak nephelometers. One nephelometer that measures either dust concentration or particle size (DustTrak 8530) and two nephelometers that simultaneously measures concentration and particle size (DustTrak 8533) are required. MSB requires the DustTrak nephelometers for compatibility with other DustTrak sensors ERDC already owns. This would allow the new sensors to be used in conjunction with currently owned sensors during testing. Data analysis software for the DustTrak nephelometers should also be included.

Specifications for the DustTrak 8533 (Qty. 2)

• Simultaneous measurements of mass fraction concentrations corresponding to PM1, PM2.5, respirable, PM10 and PM Total size fractions

• Must be able to operate outdoors (need one environmental enclosure) for 12 hours or more using batteries

• Must be battery operated, with rechargeable batteries

• Must include a real-time display

• Particle size range from 0.1 to 15 µm

• Aerosol concentration range from 0.001 to 150 mg/m3

• Programmable data logging

• Resolution: greater of ±0.1% of reading or 0.001 mg/m3

• Flow rate: minimum of 3.0 L/min

• Flow accuracy: maximum of ±5%

• Logging interval: programmable, up to 1 second

• Accessories: Auto zeroing module, protective environmental enclosure, heated inlet sample conditioner

Specifications for the DustTrak 8530 (Qty. 1)

• Measures aerosol concentrations corresponding to PM1, PM2.5, respirable, PM10 or size fractions

• Must be able to operate outdoors (need one environmental enclosure) for 12 hours or more using batteries

• Must be battery operated, with rechargeable batteries

• Must include a real-time display

• Particle size range from 0.1 to 10 µm

• Aerosol concentration range from 0.001 to 400 mg/m3

• Programmable data logging

• Resolution: greater of ±0.1% of reading or 0.001 mg/m3

• Flow rate: 1.40 to of 3.0 L/min

• Flow accuracy: maximum of ±5%

• Logging interval: programmable, up to 1 second

DELIVERY:

• Quote must include shipping costs

• The DustTraks should be provided to the ERDC within 90-120 days of contract award.

• Ship to the following address:

US Army Engineer Research and Development Center

ATTN:

3909 Halls Ferry Road Vicksburg, MS 39180

REFERENCES:

Mikel, D. K. and Merrill, R. (2011). EPA Handbook: Optical Remote Sensing for Measurement and Monitoring of Emissions Flux. Research Triangle, North Carolina, 27711. Available on-line at https://www3.epa.gov/ttn/ emc/guidlnd/gd-052.pdf (Last visited on August 28th, 2020).