4. You are a member of a team of external consultants invited to carry out an environmental audit for a client. The client's factory, on a single site, manufactures a range of powdered beverages and instant dry food products. Prior to the audit the only information available is that given in TABLE Q2. (a) List and discuss the types of pollution control equipment you would expect to find in place for the gas borne emissions. (12 marks) (b) The company would like to reduce the amount of solid waste it produces. What recommendations would you make? (7 marks) (c) What is the purpose of an environmental audit? (2 marks) (d) What are the key pieces of legislation to which the process industries have to comply? (4 marks) TABLE Q2 Process Odoriferous air. Extraction from processes, emissions gaseous pollutants plus dusts from grinding of feedstuffs and product drying stages. Extraction from cooking stages. Solid wastes Waste incineration emission. Process wastes, off- specification products, plastic packaging materials. Steam generation Biomass-fired boilers with a common stack. Workshops Metal dusts from grinding and abrasive shot blasting. Various softwood dusts from fabrication and joinery