Bypass Open, Load Calculated: A Pulp Mill in a Critically Polluted Cluster
An agro-residue pulp and paper mill rated 150 TPD holds a consent to operate valid to March 2027. Its effluent treatment plant is designed for 8,000 m³/day; the mill discharges through a 1.5 km pipeline into a seasonal stream that joins a river 9 km upstream of a water-supply intake. On a Monday morning inspection, a valve on a bypass line is found open, discharging wash water directly into the stream. The Board's team collects samples from the bypass channel in three bottles, hands one to the mill's shift chemist, and sends the rest to the Board's recognised laboratory. Analysis shows pH 8.9, BOD 120 mg/L against a limit of 30, COD 640 against 250, and SS 210 against 100; the weir measurement gives about 9,600 m³/day. Counsel argues that a single grab sample cannot prove a continuing offence, that the bypass is a 'storm water drain', and that because the cluster is already flagged as severely polluted, no action plan can be imposed on this mill alone.
1. Assess the procedural strength of the sampling under the Water Act 1974 and how you would meet the 'single grab sample' objection.
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Statutory framework. Section 21 of the Water Act 1974 empowers a Board officer to take samples of effluent; the procedure is to give notice of intention, divide the sample into portions, seal and label each portion, hand one portion to the occupier, and send the remainder without delay to a laboratory of the Board or one recognised by it. Section 22 makes the analyst's report in the prescribed form evidence of the facts stated.
Apply it. The team divided the sample into three portions and handed one to the mill's chemist - the essential safeguard is satisfied. Whether the case survives depends on the details an appeal will attack: was the notice of intention given and recorded, were the bottles sealed and labelled with time, place and code, was the chemist's acknowledgement signed, was the sample chilled and delivered inside the holding time, and is the analyst's report in the prescribed form with the analyst's qualification stated? Any gap converts the report into opinion rather than evidence.
Meeting the 'single sample' objection. A bypass discharge is by nature a discrete event; the sample proves that event, and the offence is complete on that day. Continuity is proved by other material, not more of the same sample:
- the weir measurement (9,600 m³/day against an ETP design of 8,000) with production data for the same days;
- the freshwater drawal and water balance, which show the water had to go somewhere;
- valve position, photographs with time stamps, and shift logs;
- an inspection of the stream bed for wash-water deposits upstream and downstream.
The 'storm water drain' claim fails if the drain carries process wash water: the samples show BOD 120 and COD 640, which no rainwater produces. Recommend a repeat inspection at an unannounced time plus online flow metering on the bypass, so a second event is independently recorded.
2. Compute the excess load and set out how environmental compensation, remediation cost and directions should be structured.
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Load arithmetic (flow in m³/day × mg/L ÷ 1,000 = kg/day):
- BOD discharged: 9,600 × 120 / 1,000 = 1,152 kg/day; permitted at the limit: 9,600 × 30 / 1,000 = 288 kg/day; excess 864 kg/day (exceedance factor 4.0).
- COD discharged: 6,144 kg/day; permitted 2,400 kg/day; excess 3,744 kg/day (factor 2.56).
- SS: 2,016 kg/day against 960 permitted (factor 2.1).
Compensation. Under the CPCB environmental compensation methodology the levy combines the scale (the flow and pollutant load), the severity band (exceedance factors of 2 to 4 place this in a high band) and the duration, evidenced from logs and production records rather than the inspection day alone. Compensation is calculated, not negotiated: the calculation sheet should state the rate applied, the days counted and the severity band, or the demand will be struck down.
Three distinct money flows. (i) Environmental compensation - deterrent, retained by the Board; (ii) restitution cost - cleaning the stream reach and protecting the intake, billed separately with a survey; (iii) bank guarantee - secures the time-bound closure of the bypass, ETP upgradation and a real-time outlet monitor.
Directions. Sealed bypass with a written certification, immediate ETP upgradation to meet BOD 30 and COD 250 at the measured peak flow (not the design flow), Section 5 EP Act 1986 directions, Section 33A Water Act restraint on the continuing discharge if the bypass is reopened, and prosecution. Closure is the last step - it would spill untreated pulp liquor into the same stream.
3. The mill seeks expansion into the same flagged cluster and pleads that the cluster's status is not its responsibility. How do you decide the expansion application?
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The premise is wrong, but not in the mill's favour. A cluster scoring above 70 on the Comprehensive Environmental Pollution Index is treated as critically polluted, and CPCB's position is that new projects and expansions in such clusters are held back by a moratorium until a remedial action plan is implemented and the index improves. That restriction is a condition on the cluster, not a judgement about this mill's individual conduct.
But the cluster score is partly the applicant's own. The mill contributes BOD, COD and solids to the stream and is currently in breach; it cannot claim that the degradation which blocks its expansion was caused only by others, and the Board should not let a defaulting unit use the Board's own slow action plan as a shield. The correct treatment is:
- No expansion consent while the bypass and the effluent breach subsist - a pre-condition of any consideration is demonstrated compliance for a continuous, verifiable period at existing capacity;
- A bank guarantee tied to the cluster action plan obligations attributable to the mill;
- Expansion assessed under the EIA Notification 2006 with the required category and public consultation, and with the cluster action plan milestones as explicit conditions of consent;
- Conditions must be enforceable and dated - a condition that says 'comply with the action plan' with no milestone is not a condition.
Reasoning to state explicitly: the moratorium is a planning instrument, while this mill's breach is a compliance instrument. Both apply, and their sequence matters - compliance first, expansion later, at the strengthened baseline.