ESTIMATING AIR EMISSIONS FROM PETROLEUM UST CLEANUPS FIELD CARDS U.S. Environmental Protection Agency Office of Underground Storage Tanks September 1989 ------- The following field cards contain graphs that have been generated from data in the OUST report Estimating Air Emissions from Petroleum LIST Cleanups. The graphs help in estimating the rate of emissions at petroleum UST cleanup sites. Rather than looking through the entire report for the appropriate graph, you can now refer to this portable and durable set of field cards. The graphs for both benzene and volatile organic compound (VOC) emissions are included for soil excavation, vacuum extraction and air stripping. On the back of each graph are the instructions for its use. For additional information, refer to the section of Estimating Air Emissions from Petroleum UST Cleanups that is called out below the graph. ------- 400 300 AIR EMISSIONS 200 RATE (Ib/hr) 100 86°F (30°C) 68°F (20°C) 50°F(10°C) 32°F (0°C) 1000 2000 SURFACE AREA OF SOIL PILE OR SOIL LAYER (ft2) 3000 SOIL EXCAVATION / GASOLINE VOCs ------- SOIL EXCAVATION To Estimate Emissions: What is the surface area of the pile? If soil pile is a horizontal layer, surface area - volume OR surface area - length x width. height If soil pile is a cone and r - 0.5 x diameter, surface area - 3.142 r \J r2 + b2 If soil pile is a cone and r - h (approximately), surface area - 1.11 x (diameter). What is the approximate temperature at the site? Locate the line corresponding to the temperature. Locate the surface area of the soil pile on the x axis and draw a vertical line upward to the temperature line. At the intersection of these lines, draw a horizontal line to the y axis and read the emission rate off the y axis at this point. For additional information, see Estimating Air Emissions from Petroleum UST Cleanups. Section 2.0. ------- AIR EMISSIONS RATE (tb/hr) 1000 2000 SURFACE AREA OF SOIL PILE OR SOIL LAYER (ft2) 86°F (30°C) 68°F (20°C) 50°F(10°C) 32°F (0°C) 3000 SOIL EXCAVATION / BENZENE ------- SOIL EXCAVATION To Estimate Emissions: What is the surface area of the pile? If soil pile is a horizontal layer, surface area - volume OR surface area - length x width. height If soil pile is a cone and r - 0.5 x diameter, surface area - 3.142 r \r2 + h2 If soil pile is a cone and r - h (approximately), surf ace area - 1.11 x (diameter). What is the approximate temperature at the site? Locate the line corresponding to the temperature. Locate the surface area of the soil pile on the x axis and draw a vertical line upward to the temperature line. At the intersection of these lines, draw a horizontal line to the y axis and read the emission rate off the y axis at this point. For additional information, see Estimating Air Emissions from Petroleum LIST Cleanups. Section 2.0. ------- 200,000 160,000 GASOLINE 120-000 CONCENTRATION IN SOIL PORES (ppm-v) 80,000 40,000 40 80 120 PUMPING RATE (cfm) 160 100 ItVhr 75 Ihrtir 50 Ib/hr 25 Itvtir 10 ItVhr 5 ItVhr 200 VACUUM EXTRACTION / GASOLINE VOCs ------- VACUUM EXTRACTION (GASOLINE VOCs) To Estimate Emissions: What is the pumping rate of the wall in cubic faat par minute? What is the level of contamination? To obtain a conservative estimate, determine the maximum soil gas concentration of gasoline (ppm-v). To obtain a short-term average, determine the average soil gas concentration of gasoline (ppm-v). Locate the pumping rate on the x axis. Locate the soil gas concentration on the y axis. The intersection of these two points will fall on or near a curve having a specific emission rate. For additional information, see Estimating Air Emissions from Petroleum UST Cleanups. Section 3.0. ------- 2000 1500 BENZENE CONCENTRATION IN SOIL PORES 1000 (ppm - v) 500- 80 120 PUMPING RATE (cfm) 160 3 to/hr 200 VACUUM EXTRACTION / BENZENE ------- VACUUM EXTRACTION (BENZENE) To Estimate Emissions: What is the pumping rate of th« wall in cubic feat par minute? What is the level of contamination? To obtain a conservative estimate, determine the maximum soil gas concentration of benzene (ppm-v). To obtain a short-term average, determine the average soil gas concentration of benzene (ppm-v). Locate the pumping rate on the x axis. Locate the soil gas concentration on the y axis. The intersection of these two points will fall on or near a curve having a specific emission rate. For additional information, see Estimating Air Emissions from Petroleum LIST Cleanups. Section 3.0. ------- 140 120 GASOLINE CONCENTRATION IN GROUNDWATER 60 (mg/l) 40 60 PUMPING RATE (gpm) 80 100 AIR STRIPPER/GASOLINE VOCs REMOVAL EFFICIENCY = 99.99% ------- AIR STRIPPING (GASOLINE VOCs) To Estimate Emissions: What is tha removal efficiency of the air stripping system? Turn to the chart that corresponds to the system's removal efficiency (99.99%, 95%, or 85%). What is the pumping rate in gallons per minute? What is the maximum concentration of gasoline in the ground water (mg/1)? Locate the pumping rate on the x axis. Locate the contamination level on the y axis. The intersection of these two points will fall on or near a curve having a specific emission rate. For additional information, see Estimating Air Emissions from Petroleum UST Cleanups. Section 4.0. ------- 140. 120. 100. GASOLINE CONCENTRATION 80- IN GROUNDWATER (mg/l) 60. 40 _ 40 60 PUMPING RATE (gpm) 80 4 Ib/hr 3 Ib/hr 2 Ib/hr 1 Ib/hr .5 Ib/hr .1 Ib/hr 100 AIR STRIPPER/GASOLINE VOCs REMOVAL EFFICIENCY = 95.00% ------- AIR STRIPPING (GASOLINE VOCs) To Estimate Emissions: What is the removal efficiency of the air stripping system? Turn to the chart that corresponds to the system's removal efficiency (99.99%, 95%, or 85%). What is the pumping rate in gallons per minute? What is the maximum concentration of gasoline in the ground water (mg/l)? Locate the pumping rate on the x axis. Locate the contamination level on the y axis. The intersection of these two points will fall on or near a curve having a specific emission rate. For additional information, see Estimating Air Emissions from Petroleum UST Cleanups. Section 4.0. ------- 140- 120 100 GASOLINE CONCENTRATION 80 GROUNDWATER 60 40 20 20 40 60 PUMPING RATE (gpm) 80 4 Ib/hr 3 to/hr 2 to/hr 1 to/hr .5 to/hr .1 to/hr 100 AIR STRIPPER/GASOLINE VOCs REMOVAL EFFICIENCY = 85.00% ------- AIR STRIPPING (GASOLINE VOCs) To Estimate Emissions: What is the removal efficiency of the air stripping system? Turn to the chart that corresponds to the system's removal efficiency (99.99%, 95%, or 85%). What is the pumping rate in gallons per minute? What is the maximum concentration of gasoline in the ground water (mg/t)? Locate the pumping rate on the x axis. Locate the contamination level on the y axis. The intersection of these two points will fall on or near a curve having a specific emission rate. For additional information, see Estimating Air Emissions from Petroleum UST Cleanups. Section 4.0. ------- BENZENE CONCENTRATION IN GROUNDWATER (mg/l) 40 60 PUMPING RATE (gpm) 80 .2 Ib/hr .1 to/hr .05 fo/hr .01 to/hr 100 AIR STRIPPER/BENZENE REMOVAL EFFICIENCY = 99.99% ------- AIR STRIPPING (BENZENE) To Estimate Emissions: What is the removal efficiency of the air stripping system? Turn to the chart that corresponds to the system's removal efficiency (99.99%, 95%, or 85%). What is the pumping rate in gallons per minute? What is the maximum concentration of benzene in the ground water (mg/l)? Locate the pumping rate on the x axis. Locate the contamination level on the y axis. The intersection of these two points will fall on or near a curve having a specific emission rate. For additional information, see Estimating Air Emissions from Petroleum UST Cleanups. Section 4.0. ------- 15 12 BENZENE 9 CONCENTRATION IN GROUNDWATER (mg/l) 20 40 60 PUMPING RATE (gpm) .1 Ib/hr .05 Ib/hr .01 Ib/hr 100 AIR STRIPPER/BENZENE REMOVAL EFFICIENCY = 95.00% ------- AIR STRIPPING (BENZENE) To Estimate Emissions: What is the removal efficiency of the air stripping system? Turn to the chart that corresponds to the system's removal efficiency (99.99%, 95%, or 85%). What is the pumping rate in gallons per minute? What is the maximum concentration of benzene in the ground water (mg/1)? Locate the pumping rate on the x axis. Locate the contamination level on the y axis. The intersection of these two points will fall on or near a curve having a specific emission rate. For additional information, see Estimating Air Emissions from Petroleum LIST Cleanups. Section 4.0. ------- 15. BENZENE CONCENTRATION IN GROUNDWATER (mg/l) 20 40 60 PUMPING RATE (gpm) 80 <= .5 Ib/hr .4 Ib/hr AIR STRIPPER/BENZENE REMOVAL EFFICIENCY = 85.00% 10 ------- AIR STRIPPING (BENZENE) To Estimate Emissions: What is the removal efficiency of the air stripping system? Turn to the chart that corresponds to the system's removal efficiency (99.99%. 95%. or 85%). What is the pumping rate in gallons per minute? What is the maximum concentration of benzene in the ground water (mg/l)? Locate the pumping rate on the x axis. Locate the contamination level on the y axis. The intersection of these two points will fall on or near a curve having a specific emission rate. For additional information, see Estimating Air Emissions from Petroleum UST Cleanups. Section 4.0. 10 ------- |