where: (TSP),= actual concentration at field conditions, μg/m3; TSP concentration at standard conditions, μg/std m3; P,=average barometric pressure during sampling period, mm Hg; Pstd=760 mn Hg (or 101 kPa); T,-average ambient temperature during sampling period, K. 11.0 References. 1. Quality Assurance Handbook for Air Pollution Measurement Systems, Volume I, Principles. EPA-600/9-76-005, U.S. Environmental Protection Agency, Research Triangle Park, North Carolina 27711, 1976. 2. Quality Assurance Handbook for Air Pollution Measurement Systems, Volume II, Ambient Air Specific Methods. EPA-600/477-027a, U.S. Environmental Protection Agency, Research Triangle Park, North Carolina 27711, 1977. 3. Wedding, J. B., A. R. McFarland, and J. E. Cernak. Large Particle Collection Characteristics of Ambient Aerosol Samplers. Environ. Sci. Technol. 11:387-390, 1977. 4. McKee, H. C., et al. Collaborative Testing of Methods to Measure Air Pollutants, I. The High-Volume Method for Suspended Particulate Matter. J. Air Poll. Cont. Assoc., 22 (342), 1972. 5. Clement, R. E., and F. W. Karasek. Sample Composition Changes in Sampling and Analysis of Organic Compounds in Aerosols. The Intern. J. Environ. Anal. Chem., 7:109, 1979. 6. Lee, R. E., Jr., and J. Wagman. A Sampling Anomaly in the Determination of Atmospheric Sulfuric Concentration. Am. Ind. Hygiene Assoc. J., 27:266, 1966. 7. Appel, B. R., et al. Interference Effects in Sampling Particulate Nitrate in Ambient Air. Atmospheric Environment, 13:319, 1979. 8. Tierney, G. P., and W. D. Conner. Hygroscopic Effects on Weight Determinations of Particulates Collected on Glass-Fiber Filters. Am. Ind. Hygiene Assoc. J., 28:363, 1967. 9. Chahal, H. S., and D. J. Romano. HighVolume Sampling Effect of Windborne Particulate Matter Deposited During Idle Periods. J. Air Poll. Cont. Assoc., Vol. 26 (885), 1976. 10. Patterson, R. K. Aerosol Contamination from High-Volume Sampler Exhaust. J. Air Poll. Cont. Assoc., Vol. 30 (169), 1980. 11. EPA Test Procedures for Determining pH and Integrity of High-Volume Air Fil ters. QAD/M-80.01. Available from the Methods Standardization Branch, Quality Assurance Division, Environmental Monitoring Systems Laboratory (MD-77), U.S. Environmental Protection Agency, Research Triangle Park, North Carolina 27711, 1980. 12. Smith, F., P. S. Wohlschlegel, R. S. C. Rogers, and D. J. Mulligan. Investigation of Flow Rate Calibration Procedures Associated with the High-Volume Method for Determination of Suspended Particulates. EPA600/4-78-047, U.S. Environmental Protec tion Agency, Research Triangle Park, North Carolina, June 1978. Baffle Figure 1. High-volume sampler in shelter. Figure 2. Various types of flow transfer standards. Note that all devices are designed to mount to the filter inlet area of the sampler. Figure 3. Illustration of the 3 steps in the flow measurement process. Sampler 3c Calibrated flow indicator T3. P3 Linear (Y = mx + b) regression equation of Y AH(P/Psta) (298/T1) on X Qstd for Orifice Calibration Unit (1.e.. VAH(P1/Psta) (298/T1) mQstd + b) Slope (m) = Intercept (b) = Correlation coefficient (r) = (9) T1: Calibration performed by: Date: Figure 4. Example of orifice transfer standard certification worksheet. Linear regression of Y on X: Y = mx + b; Y = appropriate expression from Table 1; X = Slope (m) = Intercept (b) = Correlation Coeff. (r) = Ostd To determine subsequent flow rate during use: * = (Y-b); Ostd=([appropriate expression from Table 2) - b) Figure 5. Example of high-volume air sampler calibration worksheet. |