Hazards - Forktruck Solutions Ltd.

SRAG - Chemical Warehouses Version 6 26 June 2002ChlorpyrifosBifenthrinOrganophosphorusPyrethroid60,0001,250Conc.mg/m3394.2159.1Fraction0.10.12,130.9Cyanazinetriazine2,137.5411.70.1TriclopyrOrganochlorine3,000905.20.1571.03ImazalilImidazole625934.40.1CypermetherinPyrethroid1,2504030.1LindaneOrganochlorine25,000172.30.125,000ParaquatBipyridyl50,000930.150,000PhorateChlorfenvinfosIoxynilOrganophosphorusOrganophosphorusNitrile3,75015,0002,812.5770.1321.20.050.10.13,7502,995.72FonofosDiquatOrganophosphorusBipyridyl3,437.51,00032.13650.10.041,499.22101.92DichlorvosCarbophenothionPirimicarbOrganophosphorusOrganophosphoruscarbamate6252,5001,875163.529.2321.20.10.10.0553.521,198.63Organochlorine (Lindane) 25571.034Bipyridyl (Paraquat) 50101.918Organophosphorus (Phorate) 11627.9878 SUMMARYThis document is one of a series providing guidance on the assessment of COMAH safety reports. Itis not intended to be prescriptive and Assessors are expected to use it intelligently and be flexible inthe way they interpret its advice. Certain aspects of warehouse fire hazard modelling are still underreview within HSE and Assessors should bear in mind that the guidance in this document is likely tobe superseded at some time in the not too distant future.Section 2 lists the main topics of a warehouse safety report and outlines the level of detail Assessorsshould expect. However, sites vary considerably and while every effort has been made to make theguidance generally applicable, occasions will arise when it is either inapplicable or lacking in detail. Asafety report should contain maps, tables, plans, data sheets and environmental survey data,examples of which have been deliberately excluded from this document. Assessors are expected touse their own judgement to determine the acceptability of this type of information.The background information on warehouse fires in Section 3 is designed to give an brief overview ofthe main topics of interest. An exhaustive review of the literature and a detailed description of thenumerous problems faced by workers attempting to model the various phenomena is not attemptedand if Assessors require more information they should consult the MSDU topic specialist.Section 4 describes in detail the sort of consequence analysis that Assessors should expect to see ina COMAH safety report. There are numerous methods involving many assumptions that can beapplied to warehouse fire hazards and some of the more popular that produce conservative results are