Solvent Vapour, Oily Rags, and a Shared Workshop
At a vocational painting workshop in Berhampur, 14 students share a 7 m × 5 m room with one sliding window and a ceiling fan. The room stores five litres of turpentine in an open jerrycan, half-used linseed oil, and a mixed bin of cotton rags. Students clean brushes with turpentine at their desks and leave rags in the bin overnight. A spray fixative is used indoors near the door. One student has developed itchy, cracked skin on both hands; another complains of headaches by afternoon. An extension board with six plugs runs across the floor to a hot plate used for melting wax. The instructor has one pair of nitrile gloves, no eyewash, and a first-aid box containing only bandages. The principal has approved a small budget for improvements but wants the class to continue without interruption.
1. Rank the hazards in this workshop and justify the order.
Read the worked answer
Highest: solvent vapour and open turpentine in a small room with one window; the afternoon headaches are a likely early symptom. Next: rags soaked in linseed oil-spontaneous combustion risk if bundled; the bin should be metal with a self-closing lid and emptied daily. Then: skin contact with turpentine and the student's cracked hands-dermatitis needs referral and glove use. Then: spray fixative indoors-fine mist inhalation; move outdoors or use a spray booth. Then: electrical extension and hot plate near solvents and water-trip and ignition risk. Low but real: no eyewash and inadequate first aid. Ranking by severity multiplied by likelihood, not by how visible the hazard is.
2. List immediate no-cost or low-cost changes the instructor can make before the next class.
Read the worked answer
Open the window and door to create cross-ventilation; move brush cleaning to a tray near the window; replace the open jerrycan with a small labelled squirt bottle and keep the bulk container closed in a metal cabinet; put rags in a metal bin with a lid and remove daily; ban eating and drinking at benches; move spray fixing outside; tape the extension lead or reroute it away from walkways; keep the hot plate off when solvents are open. Assign one student as safety monitor for the week. These changes cost almost nothing but reduce vapour, ignition, and trip risks. The student with dermatitis should stop solvent contact until reviewed.
3. Recommend storage, PPE, and documentation measures for the small budget.
Read the worked answer
Store turpentine in a locked metal cabinet, away from heat, with a spill tray; keep only a day's working quantity at benches. Linseed oil rags go into a listed metal container and are either washed or spread flat outdoors to dry before disposal-never crumpled. Provide nitrile gloves, aprons, and eye protection; the student with dermatitis should be referred and given a barrier cream and gloves, and should not clean brushes with solvent until skin clears. Add an eyewash bottle and a proper first-aid box. Record the hazard ranking, the changes made, the student's report, and the principal's approval. A brief weekly inspection checklist makes the improvements stick.