6.7 Budgeting, Procurement, Inventory & Capital Planning

Budgeting, Procurement, Inventory & Capital Planning

The ABC Water Treatment criteria list "prepare budgets," "determine costs and follow procurement procedures needed for maintenance, operation, and repairs," "track and maintain inventory (e.g., equipment, chemical, and general supplies)," and "operational and capital project implementation: project management, contract management, capital improvement planning." Virginia's regulations reinforce this by requiring at least four of the 18 CPE contact hours to be in utility management for Class 1 and Class 2 operators (18VAC160-30-200 B and 18VAC160-30-210 B).

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1. Operating Budget Versus Capital Budget

The line between them is set by a capitalization threshold (commonly $5,000 to $25,000) and a useful life criterion (typically more than one year). A pump rebuild is usually operating; a pump replacement is usually capital.

Where the money goes at a typical treatment plant

The two categories an operator directly controls day to day are chemicals and energy, which is precisely why the ABC criteria pair "prepare budgets" with "optimize the use of energy and chemicals."

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2. Cost Arithmetic

Chemical cost per million gallons

$/MG = Dose (mg/L) x 8.34 x Unit price ($/lb)

At 32 mg/L of alum at $0.26/lb: 32 x 8.34 x 0.26 = $69.39 per MG. At 4.5 MGD that is $312/day, $114,000 per year. A jar-test-verified reduction to 27 mg/L saves 5 x 8.34 x 0.26 x 4.5 x 365 = $17,800 per year - a real, defensible number to put in a budget narrative.

Annual chemical quantity for budgeting

lb/yr = Dose (mg/L) x 8.34 x Average flow (MGD) x 365

At 32 mg/L and 4.5 MGD: 32 x 8.34 x 4.5 x 365 = 438,000 lb/yr, or 219 tons. That figure drives both the budget line and the bid quantity.

Energy unit cost

kWh per MG treated = Total kWh / MG produced

Benchmarks worth knowing: conventional surface water treatment typically runs 1,500 to 2,500 kWh per MG including high-service pumping, and conventional activated sludge wastewater treatment runs 1,500 to 3,000 kWh per MG, higher with nitrification. Tracking this ratio monthly - rather than tracking the bill - separates a rate increase from a real efficiency loss.

Demand charges are often 30 to 50 percent of an electric bill and are billed on the highest 15- or 30-minute peak in the month. Staggering pump and blower starts, avoiding simultaneous backwash and high-service peaks, and shifting discretionary loads off the peak window can cut the bill without cutting a single kilowatt-hour of consumption.

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3. Procurement Under the Virginia Public Procurement Act

Virginia public bodies purchase under the Virginia Public Procurement Act (VPPA), Sect. 2.2-4300 et seq. of the Code of Virginia. Localities adopt their own policies within it, so exact dollar thresholds vary by locality - know your own.

The methods

Two rules that catch operators out:

1. "We have always bought this brand" is not a sole source. A sole source determination must show that no other product will practicably meet the need - not that the incumbent is familiar. Writing a specification around a single manufacturer's proprietary features has the same problem.
2. An emergency purchase must be a real emergency, documented at the time. A foreseeable failure that was deferred is not an emergency.

Ethics. The VPPA contains conflict-of-interest and gift provisions, and 18VAC160-30-330 independently prohibits an operator from conflicts of interest. Accepting anything of value from a chemical supplier or an equipment vendor whose products you specify or evaluate is a problem under both.

Writing a good specification

• Describe performance, not a part number, wherever possible: capacity, head, efficiency at the duty point, materials of construction, applicable standards (NSF/ANSI 61 and 372 for anything contacting potable water), and warranty.
• State the acceptance test. A pump specification with no witnessed performance test is a wish.
• Specify chemical quality by standard - AWWA standards for treatment chemicals, with a required certificate of analysis and NSF/ANSI 60 certification.
• Include delivery, unloading, and container requirements - this is where a specification protects the operator physically as well as financially.

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4. Inventory Control

What to stock, and why

Critical spares are stocked precisely because their usage rate is near zero. A part used once a decade whose absence stops the plant for 16 weeks belongs on the shelf; a part used monthly whose absence stops nothing does not need a large stock.

Reorder arithmetic

Reorder point = (Average usage per day x Lead time in days) + Safety stock

A plant uses 480 lb/day of sodium hypochlorite equivalent, the supplier's lead time is 10 days, and the utility carries 5 days of safety stock:

• Reorder point = (480 x 10) + (480 x 5) = 4,800 + 2,400 = 7,200 lb, which the operator converts to a tank level and marks on the gauge.

Chemical inventory has an expiry dimension that ordinary inventory does not. Sodium hypochlorite loses strength with time and temperature, so larger orders are not always cheaper - the discount can be smaller than the strength lost. Order smaller and more frequently, store cool and dark, rotate stock first in, first out, and verify strength on receipt.

Inventory discipline

• Cycle counting - count a portion of the inventory continuously rather than shutting down for an annual count.
• Minimum and maximum levels set for every stocked item, and reviewed annually against actual usage.
• A single controlled storeroom with issue records. Parts scattered in five locations get bought three times.
• Obsolete stock write-off - carrying spares for equipment removed a decade ago is a real cost in space and in confusion.

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5. Capital Improvement Planning

A capital improvement plan (CIP) is a rolling multi-year list of projects with cost estimates, schedules, and funding sources. It is where asset management output becomes money.

How projects earn a place

1. Regulatory driver - a new standard, a consent order, a permit limit that current treatment cannot meet.
2. Condition and risk - assets at end of life ranked by criticality, meaning consequence of failure times likelihood of failure.
3. Capacity - growth, or a hydraulic bottleneck.
4. Efficiency - projects with a defensible payback, such as blower replacement, VFDs, or cogeneration.
5. Resilience - flood protection, redundancy, standby power, interconnections.

Funding sources in Virginia

• Rates and a renewal and replacement reserve - the only sustainable base.
• Revenue bonds - repaid from utility revenue; the standard for large projects.
• The Virginia Drinking Water State Revolving Fund (DWSRF), administered by VDH, and the Virginia Clean Water Revolving Loan Fund (VCWRLF), administered by the Virginia Resources Authority with DEQ - subsidized loans, with principal forgiveness available to disadvantaged systems.
• USDA Rural Development water and waste disposal loans and grants for small rural systems.
• Virginia Community Development Block Grant funds.
• Capital recovery / availability fees on new connections, so growth pays for growth.

Full cost pricing

Rates should recover:

1. Operations and maintenance;
2. Debt service;
3. A renewal and replacement reserve sized against the depreciation of the asset base; and
4. An operating reserve for cash flow and emergencies.

A utility that funds only the first two is consuming its asset base and shifting the cost to a future rate payer. The most common symptom is a distribution system with a break rate that rises every year while the replacement rate stays flat.

What the operator contributes to this conversation is the thing nobody else in the room has: the failure history, the condition data, the run hours, the chemical and energy trend, and the specific consequences of deferral. A budget request that says "the raw water pump is old" loses. One that says "this pump has failed twice in 18 months, it is non-redundant, its replacement lead time is 22 weeks, and its failure stops all production" wins.