Problem 5. a. Please define ERPG-1, ERPG-3, EEGL-24 hour, AEGL-level 3, and LOC (level of concern) (5) b. A storage tank

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Problem 5 A Please Define Erpg 1 Erpg 3 Eegl 24 Hour Aegl Level 3 And Loc Level Of Concern 5 B A Storage Tank 1 (58 KiB) Viewed 19 times

Problem 5. a. Please define ERPG-1, ERPG-3, EEGL-24 hour, AEGL-level 3, and LOC (level of concern) (5) b. A storage tank of a toxic chemical (ERPG-1 = 0.25 mg/m³) is located 1.5 km from a residential area of Melbourne. It is always sunny in Melbourne and assume wind is blowing at 3.9 m/s. Please calculate the amount of toxic chemical instantaneously released at the ground level to produce a concentration at the boundary of the residential area equal to ERPG-1. (10) Plume Table 5-1 Atmospheric Stability Classes for Use with the Pasquill-Gifford Dispersion Model Surface wind speed (m/s) 2-3 3-4 4-6 >6 Stability clas Strong A A-B 15 C C A extremely untable B, moderately unstable C, slightly stable D. neutrally stable Daytime insolation Moderate A-B B B-C C-D Dº Slight muuda D' D Nighttime conditions 1 hour after den Thin overcast or >4/8 low cloud 9999 E Dº Dº D 3/8 cloudiness F F E D D slightly stable F.mislerately stable EA. Gifford, "Use of Routine Meteorological Observaties for Estimating Aimospheric Dispersion. Narar Safety (1961), 2(4): 47. EA Giord, "Trtalent Diffusion Typing Schemes A Review Nuclear Safety (1976), 17(16 Strong inslation corresponds to a sunny midday in mahummer in England Slight insolation to similar condi to in midwinter "Night refers to the period 1 hour before mer and "These values are filled in to complete the table "The neutral category D should be used, regardless of wind speed, for overcast condition during day or night and for any sky conditions during the hour before or after sumet or suscie, respectively Pasquill-Gifford Stability Class Rural conditions A D C D E F Urban conditions A-B C D Pasquill-Gifford Stability Class A B C D E F (0) 0.221-0.0001 0.161 0.0001) 0.11 0.0001 0.01 0.0001ay** 0.0-0.0001 0.04(1-0.0001) 0.321 0.0004y 0.221-0.0004 0.16 0.0004) 0.11 0.0004) Puff (m) or (m) 0.18 0.14 0.10 0.06 0.04 0.02 (m) 0.20 0.12 0.080.0002) 0.061 0.0015 001+0.0001) 0.0161+0.0001 0241+0.001 0.20 0.14x(1+0.0001) 0.081 +0.0015) a(m) 0.60 0.53 0.34 0.15 0.10 0.05