S06 - Amendment 0004 - RFI Q 35 - AppendixE 3of4-Boring Logs.pdf
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- Attached to
- EHRM | Butler VA HCS 529-22-700 | Construct Infrastructure Upgrades Federal contract opportunity
- Solicitation number
- 36C77625R0057
About this file
These are geotechnical boring logs for the VA Butler Healthcare Gateway Project (Project No. C-18068-0005), documenting two separate soil borings performed at the project site. The logs detail subsurface conditions from ground surface to depths of approximately 27-29 feet, with comprehensive descriptions of geological strata, including:
Boring 1 and Boring 2 both show similar geological compositions, starting with topsoil and fill layers (brown silty clay with rock fragments) and progressively transitioning to deeper layers of decomposed siltstone, claystone, and interbedded rock formations. Groundwater was noted at 1274' in Boring 2, while Boring 1 showed no groundwater encountered. The borings reveal increasingly dense and stiff geological materials with depth, transitioning from fill and colluvial layers to residual bedrock zones, characterized by gray decomposed siltstone, claystone, and occasional carbonaceous seams. The core recovery percentages for the bedrock sections range from 76% to 100%, indicating relatively solid subsurface conditions for potential construction activities.
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Text version
* percent core recovery VA BUTLER HEALTHCARE
GATEWAY PROJECT NO. C-18068-0005
B O R I N G 1
Ground Surface Elevation: 1281.4' Groundwater Elevation: None Encountered
DEPTH
(feet)
N
(blows/foot)
DESCRIPTION AND REMARKS
0.0 0.3 - Topsoil
0.3 1.5 6 Brown sandy silty clay, organic silt, and rock fragments, trace of carbonaceous rock fragments -medium, moist (FILL)
3.0 - 4.5 6 Brown sandy silty clay, organic silt, and rock fragments, trace of roots - medium, moist
6.0 - 7.5 5 Brown-gray sandy clay, some rock fragments, slag, and cinders - medium, moist
9.0 - 10.5 19 No sample recovery
12.0 - 13.5 31 Gray and brown decomposed siltstone - extremely stiff, damp (RESIDUAL)
15.0 - 16.5 53 Gray and brown decomposed siltstone - extremely stiff, damp
18.0 - 19.5 70 Gray decomposed siltstone with carbonaceous seams - extremely stiff, damp
21.0 - 22.5 66 Gray decomposed silty claystone with carbonaceous seams - extremely stiff, damp
24.0 - 24.9 50/0.4' Gray decomposed silty claystone with carbonaceous seams - refusal, damp
24.9 - 27.4 NQ-2 core Gray silty claystone with carbonaceous seams -moderately to occasionally broken, soft to medium hard (100)* (BEDROCK)
27.4 - 29.9 '' Gray interbedded sandstone and siltstone, trace of angular joints - occasionally broken to massive, hard with medium hard seams (100)
(bottom of boring)
* percent core recovery VA BUTLER HEALTHCARE
GATEWAY PROJECT NO. C-18068-0005
B O R I N G 2
Ground Surface Elevation: 1282.1' Groundwater Elevation: 1274'
DEPTH
(feet)
N
(blows/foot)
DESCRIPTION AND REMARKS
0.0 0.4 - Topsoil
0.4 - 1.5 8 Brown silty clay, some organic silt, sand, and rock fragments, trace of slag - medium, damp
(FILL)
3.0 - 4.5 9 Brown silty clay, some sand and rock fragments, trace of brick fragments - stiff, moist
6.0 - 7.5 17 Brown-gray silty clay, trace of rock fragments -very stiff, damp (COLLUVIAL)
9.0 - 10.5 16 Brown and gray silty clay, some rock fragments and carbonaceous rock fragments - very stiff, moist
12.0 - 13.5 36 Gray decomposed shaley siltstone - extremely stiff, damp (RESIDUAL)
15.0 - 16.5 56 Gray decomposed siltstone - extremely stiff, damp
18.0 - 19.5 59 Gray decomposed siltstone with carbonaceous seams - extremely stiff, damp
21.0 - 22.0 44/0.5' Gray decomposed siltstone with carbonaceous seams, trace of decomposed bone coal - extremely stiff, damp
22.0 - 22.2 50/0.2' Gray decomposed siltstone with carbonaceous seams, trace of decomposed bone coal - refusal, damp
22.2 - 23.9 NQ-2 core Brown and gray claystone with carbonaceous seams - massive, soft (76)* (BEDROCK)
23.9 - 27.2 '' Gray silty claystone with carbonaceous seams, trace of vertical fractures and angular joints -extremely to moderately broken, soft to medium hard (88)
(bottom of boring)
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