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 (56.87 KiB) Viewed 32 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) d 2-3 3-4 4-6 Stability classes Strong A A-B 11 C A extremely unstable 8, moderately unstable C. slightly stable Deutrally stable E slightly stable Daytime insolation Moderate A-B 11 B-C C-D D Slight MUUÂÅ C D' D* Nighttime conditions Thin overcast or >4/8 low cloud. tioninmidwinter. "Night refers to the period 1 hour before sunset and 3 horferde P E Dº Dº Dº 3/8 cloudiness P F E D₁ Dº Emoderately stable EA. Gond "Use of Routine Meteorological Observations for Extinating Amospheric Dispersion Nacar Seley (1961), 2(4): 47. EA. Giffond, "Turbulent Diffusion-Typing Schemes A Revies Nuclear Safety (1976), 17(1) Strong isolation corresponds to a sunny midday in midsummer in England Slight imolation to similar condi These values are filled in to complete the table. "The neutral category D should be used, regardless of wind speed, for overcast conditions during day or night and for any sky conditions during the home before or after set or sure.respectively Pasquill-Gifford Stability Class Rural conditions A B C D E F Urban conditions A-B C D E-F Pasquill-Gifford Stability Class A B с D E F a (m) 0.221-0.0001ay 0.16 0.0001) 0.11 0.000142 0.01 0.0001ay 0.061 0.0001ay 0.041 0.0001 0321 0.0004y 0.2210.000 0.16 0.0004 0,11(1+0.0004) Puff (m) or (m) 0.18 0.14 0.10 0.04 0.02 (m) 0.20 0.12 001+00002) 6.061 0.0015 0.01(1+0.0001) 0.016 (1+0.0003 0241+0.001 0.20 0.141+0.0003 0.081 +0.0015ay (m) 0.60 0.53 0.34 0.15 0.104 0.05