Perform geotechnical investigation; twenty (20) six inch diameter soil borings up to a maximum 25 feet depth. In-situ standard penetration tests (spt) in each boring with soil samples at 2. 5 foot intervals to a 15 feet depth and 5 foot intervals thereafter. Borings will be back filled and grouted immediately with a bentonite 60: cement mixture with a 2. 1 ration of benonite cement mix to water.

Dc water clean rivers project. Anacostia river tunnel cso 007. Site civil work for construction staging area. General land disturbance, grading clear and grub sediment erosion control, stormwater management.

After hours work at dc waters clean rivers project - div h, cso 007 shaft site located at good hope rd & anacostia dr, se. Second shift work necessary to meet the the contractual milestones set forth in epa consent decree. All work will be conducted within existing lod shown on dcra-approved permit drawings associated with bciv1400047

Soil boring for installation of geotechnical instrumentation at cso 007 site of dc waterÆs anacostia river tunnel project. Twenty-four borings ranging from 11 to 117 feet below ground surface, 6. 25 inch diameter. Mud rotary and hollow stem auger drilling method.

Soil boring for installation of stabilization grout injection tubes during construction of dc waters anacostia river tunnel. Seven borings to 95 feet below grade, 2 inch diameter tubes inside 5. 5 inch diameter temporary steel casing. Duplex rotary drilling method.

After hours work at dc waters clean rivers project - div h, cso 007 shaft site located at good hope rd & anacostia dr, se. Second shift work necessary to meet the the contractual milestones set forth in epa consent decree. All work will be conducted within existing lod shown on dcra-approved permit drawings associated with bciv1400047

Soil boring for compensation grouting along the alignment of dc waters clean rivers div h - anacostia river tunnel. Forteen borings to max depth of 65 feet bgs, 2 inch diameter grout tubes inside 5. 5 inch dia casings. Duplex rotary drilling method. Ref. Permit sb1400400.

Soil boring for installation of temporary deep dewatering system at cso 007 site of dc clean rivers div h. Seventeen borings of to 1 feet below ground surface. Includes 15 pumping wells of 14" diameter, and 2 monitoring wells of 8" diameter. Mud rotary drilling method with outer casing.

Work at dcw clean rivers project div . H cso 007 shaft site located at good hope rd and anacostia dr. Se. All work will be conducted within existing lod shown on drca approved permits drawings

Perform geotechnical investigation; twenty (20) six inch diameter soil borings up to a maximum 25 feet depth. In-situ standard penetration tests (spt) in each boring with soil samples at 2. 5 foot intervals to a 15 feet depth and 5 foot intervals thereafter. Borings will be back filled and grouted immediately with a bentonite 60: cement mixture with a 2. 1 ration of benonite cement mix to water.

Soil boring for installation of stabilization grout injection tubes during construction of dc waters anacostia river tunnel. Seven borings to 95 feet below grade, 2 inch diameter tubes inside 5. 5 inch diameter temporary steel casing. Duplex rotary drilling method.

Soil boring for installation of geotechnical instrumentation at cso 007 site of dc waters anacostia river tunnel project. Twenty-four borings ranging from 11 to 117 feet below ground surface, 6. 25 inch diameter. Mud rotary and hollow stem auger drilling method.

Perform geotechnical investigation; twenty (20) six inch diameter soil borings up to a maximum 25 feet depth. In-situ standard penetration tests (spt) in each boring with soil samples at 2. 5 foot intervals to a 15 feet depth and 5 foot intervals thereafter. Borings will be back filled and grouted immediately with a bentonite 60: cement mixture with a 2. 1 ration of benonite cement mix to water.

Soil boring for installation of stabilization grout injection tubes during construction of dc waters anacostia river tunnel. Seven borings to 95 feet below grade, 2 inch diameter tubes inside 5. 5 inch diameter temporary steel casing. Duplex rotary drilling method.

Soil boring for installation of geotechnical instrumentation at cso 007 site of dc waters anacostia river tunnel project. Twenty-four borings ranging from 11 to 117 feet below ground surface, 6. 25 inch diameter. Mud rotary and hollow stem auger drilling method.

Soil boring for installation of stabilization grout injection tubes during construction of dc waters anacostia river tunnel. Seven borings to 95 feet below grade, 2 inch diameter tubes inside 5. 5 inch diameter temporary steel casing. Duplex rotary drilling method.

Soil boring for installation of geotechnical instrumentation at cso 007 site of dc waters anacostia river tunnel project. Twenty-four borings ranging from 11 to 117 feet below ground surface, 6. 25 inch diameter. Mud rotary and hollow stem auger drilling method.

After hours work at dc waters clean rivers project - div h, cso 007 shaft site located at good hope rd & anacostia dr, se. Second shift work necessary to meet the the contractual milestones set forth in epa consent decree. All work will be conducted within existing lod shown on dcra-approved permit drawings associated with bciv1400047

Soil boring for installation of temporary deep dewatering system at cso 007 site of dc clean rivers div h. Seventeen borings of to 1 feet below ground surface. Includes 15 pumping wells of 14" diameter, and 2 monitoring wells of 8" diameter. Mud rotary drilling method with outer casing.

Soil boring for compensation grouting along the alignment of dc waters clean rivers div h - anacostia river tunnel. Forteen borings to max depth of 65 feet bgs, 2 inch diameter grout tubes inside 5. 5 inch dia casings. Duplex rotary drilling method. Ref. Permit sb1400400.

After hours work at dc waters clean rivers project - div h, cso 007 shaft site located at good hope rd & anacostia dr, se. Second shift work necessary to meet the the contractual milestones set forth in epa consent decree. All work will be conducted within existing lod shown on dcra-approved permit drawings associated with bciv1400047

After hours work at dc waters clean rivers project - div h, cso 007 shaft site located at good hope rd & anacostia dr, se. Second shift work necessary to meet the the contractual milestones set forth in epa consent decree. All work will be conducted within existing lod shown on dcra-approved permit drawings associated with bciv1400047

Work at dcw clean rivers project div . H cso 007 shaft site located at good hope rd and anacostia dr. Se. All work will be conducted within existing lod shown on drca approved permits drawings