Site Investigation - Trial Pit Logs
Notes:
TH 1 | |
0 - 0.6 | PEAT |
0.6 - 0.9 | Soft, pale grey/beige, slightly sandy silt. |
0.9 - 2.9 | Soft to firm, fissured, reddish brown silty CLAY, with fine gravel particles, and occasional diameter 0.3 boulders of grey and red sandstone. |
2.9 - (3.2) | Red sandstone. Too hard to excavate. |
TH 2 | |
0 - 0.6 | PEAT |
0.6 - 2.9 | Loose, light brown, silty fine SAND |
2.9 -(3.6) | Red coarse sand. At 1.9, 0.3 thick lens of light brown sand at one end of trench.. Strong make of water at 1.9 . |
TH 3 | |
0 - 0.4 | PEAT |
0.4 - 0.8 | Soft, pale grey/beige, slightly sandy silt. |
0.8 - 1.6 | Firm, brown silty CLAY with coarse sand and fine gravel sized particles, and occasional coarse gravel and cobbles of sandstone. |
1.6 - 2.3 | Red coarse sand. Make of water at 2.2 . |
2.3 - (3.6) | Fractured, weathered red SANDSTONE. Very difficult to excavate. |
TH 4 | |
0 - 0.25 | PEAT |
0.25 - 0.5 | Loose, light beige, silty, fine sand. |
0.5 - 1.7 | Soft to firm, fissured, brown silty CLAY with some gravel. Pockets of red sandy clay. |
1.7 - (3.1) | Dense, maroon brown sand and sandstone cobbles. Make of water at 2.9 . |
TH 5 | |
0 - 0.4 | PEAT |
0.4 - 0.8 | Soft to firm, beige, sandy, very clayey silt |
0.8 - 1.5 | Firm, reddish brown, sandy, silty CLAY with gravel. Lenses of SAND and pockets of sandy SILT. Occasional cobbles of sandstone. |
1.5 - (3.25) | Dense, maroon brown sand with highly weathered sandstone cobbles below 2.7 . |
TH 6 | |
0 - 0.4 | PEAT |
0.4 - 0.6 | Firm to stiff orange brown CLAY with occasional cobbles of sandstone and small pockets of sand. |
0.6 - (3.1) | Red sand. |
TH 7 | |
0 - 0.3 | PEAT |
0.3 - 0.6 | Firm, beige, sandy, clayey silt |
0.6 - (4.1) | Firm to stiff, brown, silty CLAY with red and grey sandstone gravel, and occasional pockets of grey sandy silt around decomposing root material, at shallower depths orange/brown sandy clay. Cobbles of sandstone. Becoming progressively stiffer and more homogeneous with depth. |
TH 8 | |
0 - 0.35 | PEAT |
0.35 - 0.75 | Firm, light brown, sandy, silty CLAY. |
0.75 - (4.1) | Firm to stiff, becoming very stiff with depth, fissured, brown silty CLAY, with some sand and gravel particles, cobbles and small boulders. Large particles are green in colour, not sandstone, possibly igneous rock. |
TH 9 | |
0 - 0.4 | PEAT |
0.4 - 0.6 | Loose, light brown, silty fine SAND |
0.6 - 1.4 | Soft, brown CLAY with decaying roots and small pockets of red/grey sand and sandstone. |
1.4 - (4.1) | Stiff to very stiff, fissured, brown, CLAY with some gravel; cobbles and boulders (diameter 0.3 - 0.4) at depth. |
TH 10 | |
0 - 0.25 | PEAT |
0.25 - 0.4 | Soft, light brown, fine sandy, silty CLAY. |
0.4 - 2.0 | Soft, brown CLAY with roots and gravel (as TH 9). |
2.0 - (5.6) | Stiff to very stiff, fissured, maroon brown CLAY. |
TH 11 | |
0 - 0.25 | PEAT |
0.25 - 0.45 | Soft, light brown, fine sandy, silty CLAY. |
0.45 - 1.1 | Soft, brown CLAY with orange brown gleying and red and grey sandy pockets. |
1.1 - (4.75) | Stiff, maroon brown CLAY with gravel. Layer of boulders and cobbles from 2.9 to 3.5 . |
TH 12 | |
0 - 0.2 | PEAT |
0.2 - 0.45 | Soft, light brown, very fine sandy SILT:CLAY. |
0.45 - 1.0 | Soft, reddish brown CLAY with occasional orange sandy clay pockets and grey silty clay pockets. |
1.0 - (5.3) | Stiff, brown CLAY with gravel. Occasional cobble and boulder. |
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