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 (56.89 KiB) Viewed 36 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 >6 Stability classes Strong A A-B 13 C A extremely unstable B, moderately unstable C, slightly stable Deutrally stable E, slightly stable Daytime insolation Moderate A-B 11 B-C C-D D Slight MUUÃÃ C D D Nighttime conditions Thin overcast or >4/8 low cloud F E Dº Dº Dº 3/8 cloudiness P F E Dº Dº Emoderately stable F.A. Gond, "Use of Routine Meteorological Observations for Extinating Aspheric Dispersion Nacar Seley (1961), 2(4) 47. FA Giffond, "Turbulent Diffusion-Typing Scheines A Review Nuclear Safety (1976), 17(1) Strong insolation corresponds to a sunny modday in midsummer in England Slight isolation to similar condi timin midwint "Night refers to the period 1 hour before sunset and 1 hour after de These values are tied 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 et or surse.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 C D E F a (m) 0.221-0.0001ay 0.16 0.0001 0.11 0.0001 0.08-0.0001 0,061-0.0001¹ 0.04 0.0001 0.321 0.0004) 0.2210.000 0.16 0.0004y 0,11at1+0.0004 Puff & (m) or a (m) 0.18 0.14 0.10 0.04 (m) 0.20 0.12 001+0.0002) 0.01 0.0015 0.01 0.0001) 0.0161+0.0003 0241+0.001 0.20 0.141+0.0001) 0.08(1+0.0015) (m) 0.60 0.53 0.34 0.15 0.100 0.05