Disaggregation of Revenue

In general, the Company’s business segmentation is aligned according to the nature and economic characteristics of our services and provides meaningful disaggregation of each business segment’s results of operations. The nature of the Company’s performance obligations within our Treatment and Services Segments result in the recognition of our revenue primarily over time. The following tables present further disaggregation of our revenues by different categories for our Services and Treatment Segments:

 Schedule of Disaggregation of Revenue

Revenues generated from fixed unit rate contracts within the Services Segment are included within the “time and material” caption under the disaggregation table above due to similarity of the revenue recognition methodology.

Contract Balances

The timing of revenue recognition and billings can result in unbilled receivables (contract assets). The Company’s contract liabilities consist of deferred revenues which represent advance payment from customers in advance of the completion of the Company’s performance obligation. The following table represents changes in our contract asset and contract liabilities balances for the periods noted:

 Schedule of Contract Balances

During the three and nine months ended September 30, 2026, the Company recognized revenue of $1,488,000 and $8,804,000, respectively, related to untreated waste that was in the Company’s control as of the beginning of such respective period. During the three and nine months ended September 30, 2025, the Company recognized revenue of $752,000 and $4,640,000, respectively, related to untreated waste that was in the Company’s control as of the beginning of such respective period. Revenue recognized in each period related to performance obligations satisfied within the respective period.

Accounts Receivable

The following table represents changes in accounts receivable, net of credit losses, for the periods noted:

 Schedule of Changes in Accounts Receivable, Net of Credit Losses

Remaining Performance Obligations

The Company applies the practical expedient in Accounting Standards Codification (“ASC”) 606-10-50-14 and does not disclose information about remaining performance obligations that have original expected durations of one year or less.

Within our Services Segment, there are service contracts which provide that the Company has a right to consideration from a customer in an amount that corresponds directly with the value to the customer of our performance completed to date. For those contracts, the Company has utilized the practical expedient in ASC 606-10-55-18, which allows the Company to recognize revenue in the amount for which we have the right to invoice; accordingly, the Company does not disclose the value of remaining performance obligations for those contracts.

The Company’s contracts and subcontracts relating to activities at governmental sites generally allow for termination for convenience at any time at the government’s option without payment of a substantial penalty. The Company does not disclose remaining performance obligations on these contracts.