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ARS Home » Plains Area » Bushland, Texas » Conservation and Production Research Laboratory » Livestock Nutrient Management Research » Research » Publications at this Location » Publication #225886
Title: PM2.5 and PM10 concentrations in four dairies on the Southern High Plains

Author
item Purdy, Charles
item Clark, Ray
item STRAUS, DAVID - TEXAS TECH UNIV

Submitted to: American Association for Aerosol Research
Publication Type: Abstract Only
Publication Acceptance Date: 5/1/2008
Publication Date: 10/24/2008
Citation: Purdy, C.W., Clark, R.N., Straus, D.C. 2008. PM2.5 and PM10 concentrations in four dairies on the Southern High Plains [abstract]. American Association for Aerosol Research 27th Annual Conference, October 20-24, 2008, Orlando, Florida. Abstract No. 7C.03. 2008 CDROM.

Interpretive Summary:

Technical Abstract: Air quality was determined in 4 dairies at the boundary, commodity barn, and compost field. Two laser DustTrak PM10 aerosol monitors and four RAAS -300 gravimetric monitors, 2 PM2.5 and 2 PM10 were employed. The DustTrak flow rate was set at 1.7 L/min and the RAAS were set at 16.6 L/min. Monitors were placed upwind and downwind at each location for 8 days in summer and winter. DustTrak PM10 monitors determined that the highest mean dust concentration occurred between 7:00 a.m. (141 +/- 11 ug/m**3/h) to 8:00 a.m. (143 +/- 10 ug/m**3/h) for the dairies. Summer concentrations were: boundary, 96 +/- 3 ug/m**3/h; commodity barn, 113 +/- 3 ug/m**3/h; compost field, 136 +/- 10 ug/m**3/h; and winter: boundary 100 +/- 4 ug/m**3/h; commodity barn, 71 +/- 2 ug/m**3/h, compost field, 38 +/- 1 ug/m**3/h. The maximum mean concentration for the 3 locations ranged from 634 to 4915 ug/m**3/h (summer) and 598 to 1140 ug/m**3/h (winter). RAAS mean PM2.5 and PM10 were significantly higher in the winter (PM2.5 33 +/- 3 and PM10 98 +/- 4 ug/m**3/24 h) compared with the summer (PM2.5, 18 +/- 1 and PM10 72 ug/m**3/24 h). The mean PM2.5 upwind concentration (19 +/- 3 ug/m**/24 h) was not significantly different than the concentration (18 +/- 2 ug/m**3/24 h) downwind of the dairy; however, mean PM10 boundary downwind concentration was significantly higher (91 +/- 3 ug/m**3/24 h) compared to the upwind (48 +/- 6 ug/m**3/24 h). Maximum PM10 concentration ranged from 288 to 781 ug/m**3/24 h, and PM2.5 concentration ranged from 104 to 125 ug/m**3/24 h. Impact: collectively the 4 dairies studied were out of compliance for PM10 concentration for 24 days (5.5%), and for PM2.5 concentration for 39 days (7.9%).