Environmental Services in Fairfax County, VA

Sites with petroleum or chlorinated solvent histories typically require soil and groundwater investigation targeting compounds such as BTEX, TPH, or PCE/TCE depending on the prior use. Sampling locations, depths, and analytical suites are selected based on the conceptual site model developed during Phase I review. Virginia DEQ's voluntary remediation program guidance may also be relevant if the site carries a known release. We document all field activities to support agency submittals.

Fairfax County's land-disturbance permitting process under the Virginia Stormwater Management Act focuses primarily on erosion and sediment control, but identified recognized environmental conditions on a property can complicate permit issuance or require coordination with VDEQ. If a Phase I has flagged concerns, resolving them before permit application prevents delays. We can structure assessment timing to align with your permitting schedule.

Piedmont residual soils—often a silty to clayey saprolite over weathered rock—can create variable permeability conditions that influence how contaminants migrate and where monitoring points should be placed. Soil borings may encounter refusal at shallow depths if weathered rock is present, which affects equipment selection and cost estimates. We account for these conditions when scoping Phase II work rather than applying a one-size approach.

Field work in Fairfax County is dispatched through the Washington, DC regional hub, about 15 miles away. Laboratory testing is performed in Sugar Land, TX under chain of custody, or in a mobile laboratory mobilized to large Fairfax County projects.

Field sampling and testing in Fairfax County are performed by our ACI- and NICET-certified technicians. Environmental engineering and professional services are delivered with professionals licensed in Virginia, coordinated under one proposal.