Fourteen Crushers, One School, and a Burning Dump: Spending ₹40 Lakh on Air Quality

Criteria: number of people exposed × severity of effect; fraction of the measured concentration actually removed; speed of implementation; durability; and legal feasibility within the year.

Ranking

1. The dump first - it is the cheapest and the most acute risk. Open smouldering of mixed waste, including plastic, produces fine particles and dioxin-type compounds at low but non-trivial levels, and a colony 300 m downwind is exposed at night when dispersion is worst. Covering the active face, stopping burning, segregating plastics, a watchman and a small compost/soil-cover operation cost a few lakh and can start within weeks. Legal basis: the Solid Waste Management Rules, 2016, which place the duty on the local body; SPCB can also issue directions.
2. Enforcement at the crushers. They are 400 m from a school whose games period is at 11 a.m. and from a health centre - a textbook sensitive-receptor problem. The leverage is free: consent renewal in four months can be made conditional on enclosures, water sprinklers at transfer points, paved and watered haul roads, covered conveyors and wheel washes. Compliance cost falls on the units; the council spends only on inspection and monitoring. This attacks the dominant source of coarse PM10.
3. The road sweeper, last. One machine for a town, without assured water and a disposal plan, redistributes dust and suppresses it for hours. Sweeping also treats the symptom: dust deposits are largely crusher and haul-road emissions settling out.

On the source-apportionment study: it would consume a large share of the budget and delay action 6–12 months. The spatial pattern (crushers upwind of the school, dust on sills, complaints clustered nearby) already justifies action. A cheap indicative survey - dust deposition jars at four sites, traffic counts, wind rose, crusher run-hour logs - can be done in parallel with enforcement at negligible cost.

The ranking reverses if: the crushers are already compliant and paved-road dust dominates; or if the dump fire is inside a populated zone and cannot be controlled by covering alone.

The weakness to avoid is a case built on three monitoring days. An enforcement action must show (a) that a condition or standard was breached, (b) that the measurement is reliable, and (c) that the unit had a hearing.

Evidence to assemble

• Ambient PM10 at the school boundary and at the health centre using a calibrated instrument, with siting, date, time and meteorological data (wind speed and direction) recorded. The wind direction is what converts a number into a causal claim.
• Fugitive-emission observations at the crushers: unwatered haul roads, uncovered conveyors, open transfer points, vehicle tracking, absence of wheel wash. Photographs with date stamps and a signed inspection log by two officers.
• Consent documents: the actual conditions imposed, their validity, and the consented capacity versus what is operating.
• Complainant statements and health-centre records. These do not prove causation but establish nuisance and support the public-interest case.

Sequence

1. Joint inspection by the SPCB regional office and council officials; sample and record.
2. Show-cause notice to each unit, listing the specific condition breached.
3. Personal hearing, and minutes of it - natural justice here is what survives appeal.
4. Use the pending consent renewal to impose stricter conditions (enclosure, sprinklers, paved roads, monitoring, bank guarantee).
5. If non-compliance continues, directions for closure of the offending operation under the Air Act's direction powers, appealable; escalate to the SPCB head office and the appellate authority, and complainants may go to the National Green Tribunal.

Do not skip step 3 to save time; most failed enforcement collapses on procedure, not on the data. Also, calibration certificates for the monitor should be obtained before the numbers are quoted in any order.

On the standards: the two standards answer different questions. The 24-hour standard of 100 µg/m³ protects against short-term exposure and is breached when a single 24-hour average exceeds it - 195, 210 and 188 µg/m³ are roughly twice that value. The annual standard of 60 µg/m³ governs long-term exposure and needs a year of data, spread across seasons, with a minimum number of valid sampling days in each season. So the crushers' counsel is right that three days cannot prove an annual average violation, and wrong that this excuses the short-term breach.

On why winter is worse - and why that does not weaken the case: winter brings low mixing height, temperature inversions and calm winds, so the same emission load produces much higher ground-level concentrations. That is precisely when the school children, the outdoor games period and the health-centre patients are exposed. A source that breaches in the season of worst dispersion is the source that matters.

Practical response:

1. Accept the point on the annual average, and commission a proper year-round monitoring programme with seasonally distributed sampling.
2. Argue the 24-hour breach now, and argue nuisance and receptor proximity.
3. Add that winter exceedances are the design case for control measures: if the control equipment works in December, it works in July.

Intellectually honest enforcement is stronger: concede what the data cannot show, then show that the concession does not change the required action. Members who accept everything a lawyer says about one standard, and ignore the breach already demonstrated, lose at appeal.