ENVIROTECH CONSULTANTS LLC DOUG HAMILTON

6401 Georgia Avenue Nw Washington Dc
Work within dcdot row will include use of 1" and 2" hose to extract and inject from existing groundwater monitoring wells at a gas station remediation site. Hoses will be temporarily staged across 6-wide sidewalk within one location and under walkover ramp. Sidewalk pedestrians will be rerouted to use other side. Temporary sidewalk closure only. No work within actual street. Work to require +/- 6 hours of sidewalk crossing. This construction permit requires a separate occupancy permit. The attached plans and conditions are a part of this permit. If steel plates are used at this job site an additional permit is needed.

6401 Georgia Avenue Nw Washington Dc
Injection of dcdoe-approved chemical oxidation materials into groundwater monitoring wells as part of a petroleum-impacted groundwater remediation project at the subject site along the north side and right-of-way/public space of tuckerman street, nw (proximate to the subject site). Injection process will start with extraction of groundwater from the same wells using 2"-diameter vacuum hose, followed by injection of chemicals using 1"-diameter chemical hose. The hoses will be laid across grade and sidewalk and under temporary walkovers to allow pedestrian traffic, along with precautionary signage warning of work area. All work to be performed during normal business hours. No excavation will be created - only temporary laying of hoses in public space extending to existing groundwater monitoring wells that were constructed in the same public space under previous permit(s). All trucks and equipment will be maintained on private property.