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GSA7 min readUpdated June 7, 2026

SIN 562910REM: Environmental Remediation Services Guide for GSA MAS

A Refresh 32 guide to GSA MAS SIN 562910REM, Environmental Remediation Services, including category fit, NAICS/PSC context, max order, TDR/OLM status, and offer preparation notes.

Built for
Contractors mapping offerings, pricing support, catalog files, labor categories, or Add SIN modifications to official GSA MAS scope
By the end
Understand where SIN 562910REM fits and what evidence to prepare before using it in an offer or modification.
Field guide

When SIN 562910REM fits

Scope fit
A close-looking SIN can still be wrong if the subcategory, PSC, NAICS, or deliverable story points elsewhere.
Signal
562910REM Remediation services include site preparation, field investigation, conservation and closures, emergency response cleanup (ERC), underground storage tank/above-ground storage tank (UST/AST) removal, air monitoring, soil vapor extraction, stabilization/solidification, bio-venting, carbon absorption, containment, monitoring and/or reduction of hazardous waste sites, unexploded ordnance removal, and remediation-related laboratory testing (e.g., biological, chemical, physical, pollution and soil testing). Reclamation services include: creating new land from sea or riverbeds, wetland restoration, and restoring areas to a more natural state (e.g., after pollution, desertification, salinization, or conditions that have made it unusable). Remediation services encompassing three (3) or more industries/NAICS codes, where the preponderance of work is at least 50% under NAICS 562910, should be solicited and performed under SIN 562910RMI. Note: Services offered under this SIN shall not include any remediation/transportation/disposal of radioactive waste, asbestos and/or paint abatement, radon mitigation, or construction or construction as defined in FAR Parts 2 and 36 (GSA Class Deviation RFO-2025-36) and architect-engineering services as defined in the Brooks Act and FAR Part 2 (including construction, alteration or repair of buildings, structures, or other real property). This SIN does not include Construction Wage Rate Requirements as defined in FAR Subpart 22.4 (GSA Class Deviation RFO-2025-22). Ordering agencies must ensure the work being required is not covered by the Construction Wage Rate Requirements statute.
Response
Compare the buyer's requirement to the official SIN language before forcing the opportunity into a familiar lane.
Service proof
Service SINs can create labor-category, qualifications, worksite, and rate-support questions.
Signal
The SIN supports service work, labor categories, deliverables, and pricing support.
Response
Prepare labor category descriptions, service narratives, past performance, FCP Services Plus data, and pricing support.
Modification path
Adding a SIN can affect catalog files, service descriptions, pricing support, and buyer-facing records.
Signal
The contractor wants to add this SIN after award or adjust offerings tied to it.
Response
Use the Add SIN and Add Product/Labor Category modification pages to plan scope, price, and evidence changes.
Refresh 32

SIN 562910REM quick facts

A compact view of the official SIN record from the user's Refresh 32 MAS offerings workbook.

Category
Professional Services
Environmental Services
NAICS
562910
NAICS codes associated with the SIN in the workbook.
PSC
F999
Product Service Code mapped to the SIN.
Max order
$1,000,000
Ordering threshold for seeking additional price reductions.
Part 1

What SIN 562910REM covers

562910REM Remediation services include site preparation, field investigation, conservation and closures, emergency response cleanup (ERC), underground storage tank/above-ground storage tank (UST/AST) removal, air monitoring, soil vapor extraction, stabilization/solidification, bio-venting, carbon absorption, containment, monitoring and/or reduction of hazardous waste sites, unexploded ordnance removal, and remediation-related laboratory testing (e.g., biological, chemical, physical, pollution and soil testing). Reclamation services include: creating new land from sea or riverbeds, wetland restoration, and restoring areas to a more natural state (e.g., after pollution, desertification, salinization, or conditions that have made it unusable). Remediation services encompassing three (3) or more industries/NAICS codes, where the preponderance of work is at least 50% under NAICS 562910, should be solicited and performed under SIN 562910RMI. Note: Services offered under this SIN shall not include any remediation/transportation/disposal of radioactive waste, asbestos and/or paint abatement, radon mitigation, or construction or construction as defined in FAR Parts 2 and 36 (GSA Class Deviation RFO-2025-36) and architect-engineering services as defined in the Brooks Act and FAR Part 2 (including construction, alteration or repair of buildings, structures, or other real property). This SIN does not include Construction Wage Rate Requirements as defined in FAR Subpart 22.4 (GSA Class Deviation RFO-2025-22). Ordering agencies must ensure the work being required is not covered by the Construction Wage Rate Requirements statute.

The official record maps this SIN to NAICS 562910 and PSC F999. Those codes are not the whole strategy, but they help explain how the offering is categorized for buyers and reviewers.

Part 2

How to prepare the offer story

For service-oriented SINs, keep the service description, labor categories, pricing support, and past-performance examples aligned. A reviewer should be able to see what work is being sold, who performs it, and why the rate story is defensible.

If the SIN is being added through eMod, write down what changes operationally: new scope, new pricing, new files, catalog impact, and who owns maintenance after approval.

Part 3

Buyer and SEO language to keep straight

Use the SIN number, title, category, and subcategory together: SIN 562910REM - Environmental Remediation Services - Professional Services - Environmental Services. That combination helps a buyer understand the lane quickly and helps the page avoid becoming a vague keyword page.

When writing capability language, explain the actual deliverables and evidence. Do not make the SIN carry the whole message by itself.

Examples

What this looks like in practice

Real-world checkHow to test SIN 562910REM before building files

Start with the official title and description: Environmental Remediation Services sits under Professional Services > Environmental Services. Then compare your actual commercial offering to that scope, not only to the NAICS code.

If the fit still looks strong, build the proof stack: offering description, pricing support, past performance or product support, and any SIN-specific files the current GSA instructions require.

  • Confirm scope language.
  • Check NAICS and PSC signals.
  • Match the pricing file to the offering type.
  • Keep the support package reviewer-friendly.

Frequently asked questions

Is SIN 562910REM part of TDR?

The Refresh 32 workbook marks TDR as Y for this SIN. GSA states that TDR became mandatory across MAS SINs with Refresh 31, so contractors should still verify current contract reporting instructions in official GSA sources.

Can order-level materials be used with SIN 562910REM?

The workbook marks OLM as Y. OLM treatment should always be verified against the current MAS solicitation, mass modifications, and contract-specific instructions.

Should I pick a SIN only because the NAICS matches?

No. NAICS helps, but SIN selection should be based on the actual offering, official SIN description, category/subcategory, pricing files, and buyer acquisition path.