URS CORPORATION ON BEHALF OF USACE

48 49 Block Of Rockwood Parkway Nw Washington Dc
Installation of one (1) flute multiport well, mp-5, in accordance with the ddoe approved work plan to assess confirm the heretofore observed absence of groundwater perchlorate and arsenic contamination in this area. Mp-5 installation will require the closure of approximately 5 lf of rockwood pwky at the intersection of glenbrook road nw washington dc. The planned location for mp-5 is five (5) feet from the southeast portion of the center island on rockwood parkway at glenbrook rd nw, washington dc. In the road, 5 feet offset from se point of lot 0901, square 1513. A nominal 6-inch diameter surface casing will be set to top of competent rock and tremie-grouted into place. At least 12 hours will be allowed for the hydrated 60: bentonite-cement grout mixture [1 lbs of bentonite powder combined with 94 lbs cement; collectively hydrated with 82 gallons of water (3 lbs of dry solids to 1 gallon of water)] to set before drilling a nominal 6-inch diameter open bedrock bore hole to the completi

48 4831 Block Of Rockwood Parkway Nw Washington Dc
No excavation. Monitoring well exists. The final stage of installation for the flute multiport well, mp-5, involves the installation of the multiport liner in accordance with the ddoe approved work plan, previous ddot construction permit 95726, and occupancy permit 10149655. Currently, an existing bedrock borehole (mp-5) with a temporary blank liner is located 5 feet se from lot 0901, square 1513, at the intersection of overlook road, nw and rockwood parkway, nw. Following the profiling, borehole geophysical testing, and final liner design; the final stage of installation involves replacing the temporary blank liner with the permanent a water flute liner. The liner will facilitate collecting water samples from the following discrete sampling intervals in feet below ground surface: 37. 5 to 45, 55 to 67. 5, to 107. 5, 122. 5 to 132. 5, and 177. 5 to 182. 5. This activity will require 24 7 closure of approximately 5 lf of rockwood pwky at the intersection of glenbrook road nw washington dc for

48 4831 Block Of Rockwood Parkway Nw Washington Dc
No well is being constructed; urs is seeking a lane closure permit on behalf of us army corp of engineers to collect groundwater samples from the flute multiport well, mp-5, at discrete sampling intervals in accordance with the ddoe approved work plan. Mp-5 is located 5 feet se from lot 0901, square 1513, at the intersection of overlook road, nw and rockwood parkway, nw. In order to best perform this sampling with limited traffic interference, traffic attempting to access rockwood pwky nw from glenbrook road nw (using overlook road nw) shall be detoured using indian lane nw. This activity will require the closure of approximately 4 lf of southbound rockwood pwky at the intersection of glenbrook road nw washington dc. Sampling is expected to be completed in one (1) day.

48 49 Block Of Rockwood Parkway Nw Washington Dc
No excavation. Monitoring well exists. Monitoring well sampling. In the roadway of rockwood parkway to collect groundwater samples from multiport well, mp-5, located 5 feet se from lot 0901, square 1513 on behalf of us army corp of engineers in accordance with the ddoe approved work plan. Sampling is expected to be completed in one (1) day. Application is identical to previously approved construction permit 102996 (deposit so1043 on file).