PSC codes › B502
PSC B502 — Air Quality Analysis: federal contracts
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What PSC B502 covers
Description: Air Quality Analysis
Official definition: GSA PSC Manual (PSC April 2025.xlsx), acquisition.gov/psc-manual. Category: Professional Services › Management Advisory Services.
Who is winning new PSC B502 work
Contractors ranked by obligations on awards that started FY2024–FY2027 to date.
| Contractor | Obligations | Awards |
|---|---|---|
| UNIVERSITY OF CALIFORNIA, DAVIS | $10.9M | 4 |
| AIR RESOURCE SPECIALISTS, INC | $8.1M | 13 |
| GENERAL DYNAMICS INFORMATION TECHNOLOGY, INC. | $4.6M | 1 |
| NEVADA SYSTEM OF HIGHER EDUCATION | $2.5M | 4 |
| H & L ENVIRONMENTAL SERVICES, LLC | $1.5M | 1 |
| RESEARCH TRIANGLE INSTITUTE | $420K | 1 |
| TRINE ENVIRONMENTAL INC | $343K | 12 |
| MABBETT & ASSOCIATES, INC. | $268K | 2 |
| ULTRAPURE AIR, LLC | $150K | 1 |
| MES SERVICE COMPANY, LLC | $126K | 1 |
How competitive is PSC B502?
- 98.6% of obligations on these awards were competed.
- 35.3% of competed awards that report offers drew a single offer (n=34).
- 37.1% went to small businesses.
- The five largest contractors hold 92.0% across 49 contractors.
NAICS codes used on PSC B502 awards
| NAICS | Industry | Share |
|---|---|---|
| 541380 | Testing Laboratories and Services | 47.0% |
| 541620 | Environmental Consulting Services | 30.3% |
| 541613 | Marketing Consulting Services | 15.4% |
| 562910 | Remediation Services | 6.1% |
| 541715 | Research and Development in the Physical, Engineering, and Life Sciences (Except Nanotechnology and Biotechnology) | 0.5% |
| 541720 | Research and Development in the Social Sciences and Humanities | 0.4% |
| 924110 | Administration of Air and Water Resource and Solid Waste Management Programs | 0.2% |
| 541990 | All Other Professional, Scientific, and Technical Services | 0.2% |
Related PSC codes
F999 Other Environmental Services, Studies, and Analytical Support · B510 Environmental Studies and Assessments · F108 Hazardous Substance Removal, Cleanup, and Disposal Services and Operational Support · R499 Other Professional Services · F101 Air Quality Support Services · R425 Engineering and Technical Services · B533 Water Quality Studies · C219 Other Architect and Engineering Services
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