Construction and Demolition Debris: What Goes Where

Why this matters

Every tear-out fills a box, and what you put in that box decides three bills: the hauler's base rent, the overweight charge on the scale ticket, and the contamination fee when the landfill finds something it does not take. Most shops learn the rules one rejected load at a time. The pattern is learnable in an afternoon: debris sorts into a handful of streams, each has a cheapest legal destination, and the expensive mistakes come from a short, predictable list of items that ride along by habit.

Three destinations, and why they price differently

Construction and demolition debris (C&D) is the waste from building, renovating and tearing out structures: wood, drywall, concrete, brick, roofing, metal, flooring, fixtures. It is not the same thing as household trash, and the two usually go to different places.

• A municipal solid waste (MSW) landfill takes household and commercial garbage. Federally these are governed by 40 CFR 258, which requires liners, leachate collection and gas monitoring. Engineering that heavy makes them the expensive door.
• A C&D landfill takes building debris only. It falls under the lighter federal criteria at 40 CFR 257, with states writing the actual permits, so it is usually cheaper per ton. The trade-off is that it is strict about what is NOT C&D: food waste, bagged household trash, liquids and anything putrescible get a load flagged.
• A recycler or materials recovery facility pulls out concrete, metal, clean wood, cardboard and sometimes drywall and shingles. Clean, single-material loads often cost less than landfill and occasionally pay you, which is why sorting at the job is worth the minutes.

A transfer station that sorts for you charges for it: that is the "mixed C&D" rate, usually the highest per-ton line on the sheet.

The state and local layer is where the rules actually live

The federal layer sets landfill construction standards; it does not tell you what to separate. That comes from your state and, more often, your city or county.

• California requires diversion of at least 65 percent of nonhazardous C&D waste on new residential construction and many additions and alterations under the state green building code (CALGreen), with local permit offices checking hauler receipts at final inspection. Several California cities set higher targets.
• Massachusetts bans a list of materials from disposal outright, including asphalt pavement, brick, concrete, metal, wood and clean gypsum wallboard. A load with those in it can be rejected or surcharged at a Massachusetts facility.
• Many states have no diversion mandate at all, and the only rule is the landfill's own acceptance list.

Your county solid waste office or hauler can tell you in one call which you are in. Ask whether the permit you pulled requires a waste plan or diversion receipts; that duty attaches to the permit, not the trade.

The field card: what each material is and where it goes

Lead-painted components and anything you suspect contains asbestos are their own regimes, governed by the EPA renovation rule and by your state's asbestos program respectively. They are not a sorting decision; they are a stop-work decision until the material is identified. The library carries those procedures separately.

Drywall is the material most shops get wrong

Gypsum is calcium sulfate. In a wet, oxygen-starved landfill cell, sulfate-reducing bacteria turn it into hydrogen sulfide, the rotten-egg gas that drives odor complaints and corrodes landfill gas systems. That is why some states ban clean wallboard from disposal and why some landfills cap how much drywall a load may carry.

The usable distinction is clean scrap versus demolition board:

• Clean scrap is offcuts from new hanging: unpainted, no tape, no mud beyond a smear. It has a real recycling market. Gypsum recyclers grind it back into wallboard feedstock or into soil amendment where the state permits that use, and some board manufacturers take back their own new scrap. Clean scrap is worth a separate bag on any job big enough to produce more than a few sheets of offcuts.
• Demolition board is painted, taped, nailed and often water-damaged. Almost no recycler wants it. It goes in mixed C&D.

Do not let demolition drywall disguise a different problem. Joint compound and some textured finishes made before the early 1980s can contain asbestos, and water-damaged board may be moldy. Neither changes the destination by itself, but both change how the crew removes it. Disturbing asbestos-containing material releases fibers that are an inhalation hazard, so suspect material gets sampled by a qualified inspector before anyone cuts or breaks it, and moldy board comes out under the respiratory protection your mold procedure specifies.

What haulers reject, and the reason behind each

A hauler rejects or surcharges an item for one of four reasons: it is regulated, it is a fire risk, it is a liquid, or the landfill's permit excludes it. Knowing the reason tells you where the item goes instead.

• Liquid paint, solvents, stains, sealers. Bulk liquids are barred from MSW landfills federally (40 CFR 258.28) and from nearly every C&D permit. Dried latex paint is often accepted; liquid is not.
• Batteries of any chemistry. Lithium-ion packs start roll-off fires; lead-acid batteries are banned from disposal in most states.
• Fluorescent tubes, mercury thermostats, ballasts. Universal waste federally, often stricter by state.
• Appliances with refrigerant or capacitors. The refrigerant is recovered and logged first.
• Pressurized cylinders. Propane, MAPP and refrigerant cylinders rupture in a compactor or a fire.
• Tires, banned from landfills in most states, and electronics in states with landfill bans.
• Household garbage and food waste. A C&D landfill cannot take putrescible waste, so a box with the customer's trash bags on top can be reclassified as MSW and billed at the higher rate.

The charge is rarely the disposal of the item itself. It is a flat contamination fee, sometimes a re-sort fee, sometimes the whole load reclassified.

Choosing the box

Most residential haulers rent boxes by volume (10, 15, 20, 30 cubic yards are common) with a weight allowance in tons included and a per-ton charge above it. Two rules come out of that pricing:

1. Heavy, inert material goes in its own box. Concrete, tile, brick and dirt hit the weight allowance when the box is a fraction full. Haulers rent a smaller heavy-debris box with a painted fill line at a better rate; mixing tile into a general box spends the allowance on the cheapest-to-recycle material in the load.
2. Never fill above the rim. Drivers refuse to pull an overfilled box or charge to have it leveled.

Worked example: a water-damage tear-out, one 20-yard box

A restoration crew tears out a finished basement after a supply-line failure. The box is a 20-yard rental with 3 tons included, an overage charged per ton above that, and a stated contamination fee per prohibited item. These terms are illustrative; read them off your own hauler's sheet.

What came out:

• Wet drywall and insulation from about 600 square feet of wall.
• Carpet and pad from the same area, soaked.
• Baseboard and door casing, painted, in a 1990s house.
• A half-full gallon of latex paint the homeowner kept under the stairs.
• Two 4-foot fluorescent tubes from the ceiling fixtures.
• An old dehumidifier the owner asked the crew to take.

The first sort. Drywall, insulation, carpet, pad and trim are C&D and go in the box. The paint is a liquid and stays out; the crew asks the homeowner whether to leave it for the county household hazardous waste drop-off, since it is the homeowner's product. The tubes are universal waste and ride back to the shop in their original sleeves to the shop's lamp container. The dehumidifier contains refrigerant and a compressor; it goes to the shop for recovery, not in the box. The trim is from a 1990s house, so the pre-1978 lead question does not arise.

What actually happened on the first job like this. The crew had put everything in the box. The scale ticket came back at 3.8 tons against the 3-ton allowance, so 3.8 minus 3.0 left 0.8 tons billed at the overage rate. The landfill found the paint can and the dehumidifier and charged two contamination fees, one per item, and the tubes broke in the box, which the facility logged.

Why the weight ran over. Water, not volume. Soaked gypsum, insulation and carpet weigh far more than dry, and the box was about two-thirds full when it hit 3.8 tons.

What changed the second time. The crew let carpet and board drain under the fans already running for the half day of drying, pulled the paint, the tubes and the dehumidifier before loading, and the next comparable box came in under allowance with no fees.

What would change the answer. In California, this job's permit may require diversion receipts, so the carpet would go to a carpet recycler if one serves the area and the trim might go to a wood recycler, with the hauler's diversion report kept in the job file. If the house were built before 1978, the painted trim would come out under lead-safe work practices and be bagged per the renovation rule before it went anywhere. If the joint compound tested positive for asbestos, the drywall would not come out under this procedure at all.

How to tell you got it right

The scale ticket shows weight under allowance, no contamination lines and the facility name. Each pulled item has its own paper: the lamp recycler's record, the refrigerant recovery log, the battery slip. An item that left the job with no paper went in the box. Where a diversion report is required, ask for it when you order the box, not after final inspection.

References

• 40 CFR Part 258, criteria for municipal solid waste landfills; 40 CFR Part 257, criteria for other solid waste disposal facilities including C&D
• California Green Building Standards Code (CALGreen), construction waste management requirements, in the edition your local building department enforces
• Massachusetts Department of Environmental Protection, waste disposal bans
• See related: Building the Shop Waste Stream Inventory; Documenting Proper Disposal So You Can Prove It
• See related: The Shop Dumpster and What Gets a Hauler Fine