Greylock Environmental, Inc. is an Environmental and Water Resources Consulting Firm focusing on accomplishing projects in a cost-effective manner.
Greylock provides the following services:
Environmental Site Assessments
- Phase 1/Phase 2/Phase 3
Environmental Cleanups
- Soil, Groundwater, Sediment, Storm Water
- Consistent with MTCA & CERCLA
Environmental Field Work
- Soil Sampling
- Water Quality Monitoring
- Groundwater Monitoring
- Sediment Sampling
- Storm Water Sampling
- UST Assessment & Remediation
Groundwater Studies
- Groundwater Mapping
- Contaminant Plume Mapping
- Well Installation
- Aquifer Testing
- Water Quality Testing
Environmental Permitting
- SEPA/NEPA
- NPDES
Stormwater Services
- Preparation of Storm Water Pollution Prevention Plans
- Stormwater Sampling
- Discharge Monitoring Report Preparation
Expert Witness
- Groundwater
- Environmental Cleanups
Our Clients Include:
- Land Owners
- Developers
- Attorneys
- Investors
- Real Estate Professionals
- Consultants
- Contractors
- Property Managers



Greylock Environmental, Inc. is a Certified Woman Owned Business (WBE), Disadvantaged Business Enterprise (DBE #D2F8019850) and King County Small Contractor and Supplier (SCS #1213).
We hold Transportation Worker Identification Credentials (TWIC) and the System for Award Management (SAM) registration.
Greylock Environmental, Inc. is an Equal Employment Opportunity Organization.