Waste haulers carry the standard vendor compliance stack plus a transportation layer that most vendor files ignore, because it comes from a different regulatory world. A municipality or authority contracting for collection, roll-off service, or biosolids hauling is contracting with a trucking operation, and the file should reflect that.
The standard stack, tuned for trucks
The base documents are familiar: certificate of insurance, additional insured endorsement with your exact entity name, workers compensation. The tuning is in the auto liability: hauling is a driving business, the exposure is the routes, and the limits your contract requires should be set with that in mind, typically well above what you would ask of a landscaper. Your solicitor or insurance advisor sets the number; the file's job is to show the certificate meets it.
The transportation layer
Operating authority and the DOT number. Motor carriers operate under USDOT registration, and the number on the truck door is publicly checkable: the federal SAFER system shows a carrier's registration status, fleet size, and safety record. A file note recording the carrier's DOT number, checked once at onboarding, connects your vendor file to that public record. For interstate operations, operating authority (MC number) sits alongside it.
Driver credentials. Collection and roll-off drivers hold commercial driver's licenses as a matter of law. Where your contract streams include regulated materials, the relevant drivers carry hazardous materials endorsements, and the carrier's own compliance program (drug and alcohol testing, hours of service) stands behind them. You do not audit any of this directly; your contract requires it, and your file records that the requirement exists and was acknowledged.
State transporter registrations. Most states require solid waste transporters to register or be licensed with the state environmental agency, with separate or additional registration for regulated medical waste, biosolids, or residual waste, depending on the stream. This is the most commonly missing document in hauler files, because it belongs to environmental regulation rather than procurement habit. It has an expiration date; it goes on the roster like anything else.
Disposal documentation. Where your contract specifies the disposal destination, the file benefits from the hauler's documentation of that destination's permits, and, for regulated streams, the manifest or receipt trail showing where loads actually went. For routine municipal solid waste this may be a contract term more than a document stream; for biosolids and special waste it is a real recurring paper flow with regulatory weight.
The subcontracted route problem
Hauling is a subcontracting industry: the company that won your contract may run some routes with its own trucks and broker others to smaller operators. Your compliance requirements do not automatically follow the load onto the subcontractor's truck unless the contract says so.
The fix is contractual and then clerical. Contractual: subcontractors permitted only with notice, and held to the same insurance and registration requirements. Clerical: when a subcontractor is disclosed, they get their own roster entry with the same document set, chased on the same cadence. The alternative, discovering at claim time that the truck involved belonged to a company you had never heard of, is the standard version of this failure.
The roster entries
Per hauler: the standard documents, plus DOT number, state transporter registration with its expiration, and a subcontractor list with each subcontractor mirrored as a roster entry. One added habit: when a truck you do not recognize shows up on a route, that is a roster question worth asking the same week.