Dccr proposes one geotechnical boring, nebbc-02, located at the department of public works complex at 1241 w street ne. The boring will be 6 inches in diameter and 192 feet deep. The boring will be drilled using sonic methods. A permanent steel outer casing will be installed and socketed feet into the potomac clays. See idw management plan and attached schematics for additional information. A monitoring well with a vibrating wire piezometer will be installed upon well completion.

Dccr project proposes to drill two direct push borings nebbd-37and nebbd-38e, located east of 1241 w street nw, one along each side of access road. The dp borings will be 2 inches in diameter and extend feet below ground surface. Teh dp borings will be backfilled with hydrated bentonite powder 2lbs bentonite to 1 gallon water. Monitoring wells will not be installed.

Dccr proposes one geotechnical boring, nebbc-16, located at the department of public works complex at 1241 w street ne. The boring will be 6 inches in diameter and feet deep. The boring will be drilled using hollow stem auger methods. A permanent pvc or steel outer casing will be installed and socketed feet into the potomac clays. See idw management pland and attached schematics for additional information. A monitoring well will be installed upon well completion.

Remove and replace detoriated sections of the existing truss system of the salt dome.

Dccr proposes one geotechnical boring, nebbc-02, located at the department of public works complex at 1241 w street ne. The boring will be 6 inches in diameter and 192 feet deep. The boring will be drilled using sonic methods. A permanent steel outer casing will be installed and socketed feet into the potomac clays. See idw management plan and attached schematics for additional information. A vibrating wire piezometer will be installed upon well completion.

Dccr project proposes to drill 3 direct push boring nebbd-74e-1, nebbd-74e-2, nebbd-74e-3 located at the department of public works complex at 1241 w street ne. The dp boring will be 2 inches in diameter and extend feet below ground surface. The borings will be completed using direct push methods with a standard hollow soil rod to collect soil samples. Groundwater samples may be collected via a peristaltic pump. Samples will be analyzed for tph-dro, tph-gro, voc, svoc, rcra metals plus vanadium, pesticides, herbicides and pcbs. All drill cuttings will be containerized in 55 gallon dot rated steel drums. All drill cuttings will be properly tested and characterized for disposal. The dp borings will be backfilled with hydrated bentonite. Monitoring wells will not be installed.