PL.PUERS 57E
Major F.W. Shotton
33(III) British Army Borehole, sunk february-march 1945
Location : Fort de Liezele, SW of Antwerp. In the
interior Court.
Approximative surface Height : - 5m.
Geological record Feet metres
1-2 Medium grained humous sand 0- 1 0.00-0.30
3. Medium grained brown sand 1- 4 0.30-1.22
4-10* Medium grained clean quartzose sand,
black speckled 4-25 1.22-7.62
11* Fine dark green, very clayey sand and
rounded flint pebbles (The pebbles are pro-
bably a basal bed to the Quaternary at 25
feet) 25-28 7.62-8.54
12-15 Fine dark green micaceous and very clayey
sand 28-39 8.54-11.90
16 Fine grey clayey sand 39-43 11.90-13.11
17-19 Fine to medium, slightly clayey, green sand 43-45 13.11-16.77
20 Fine dark green clayey sand with small patches
of pyritic cementation 55-58 16.77-17.68
21 Fine dark greenish-grey clayey sand 58-61 17.68-18.60
22* Dark greenish-grey, sandy, micaceous plastic
clay 61-64 18.60-19.52
23 Dark greenish-grey plastic clay 64-67 19.52-20.43
24 " " " " clay with pyrite
nodules 67-70 20.43-21.35
25-30 Dark greenish-grey plastic clay 70-89 21.35-27.15
31* Fine dark green clayey sand with pyrite no-
dules 89-92 27.15-28.06
32 Fine dark green clayey sand 92-95 28.06-28.97
33-37 Fine to medium dark greenish-grey, slightly
clayey sand 95-110 28.97-33.05
38* Fine to medium dark grey sand 110-113 33.05-33.96
39* Stiff plastic slightly sandy clay 113-116 33.96-34.88
39 Samples preserved and deposited with service géologique
de Belgique.
Suggested correlation :
0- 25 Quaternary
25- 29 Asschian
89-116 ? Wemmelian
Borehole completed with 6" casing perforated and gauze-wrapped,
and packed with sand graded between 0.8 mm and 2.08mm, at the
following levels :
36 to 54 feet (10.98-16.46m)
90 to 110 feet (27.44-33.54m)
Rest Level of water: 0.3 metres below ground level
Yield(s): By recovery test
With pumping level 30.5 mètres below ground : 1320 litres/h
" " " 25 " " " : 1110 litres/h
" " " 19 " " " : 833 litres/h
" " " 13 " " " : 460 litres/h
Pump installed, with suction at 32.6 mètres, yield 1365 litres/hour
Pumping level 100 ft (30.5m)
Analysis of water
Total hardness, expressed as CaCO3 8.0 parts per 100.000
Temporary hardness " " " 8.0 " " 100.000
Permanent hardness " " " nil " " 100.000
Total alkalinity " " " 36.4 parts per 100.000
Salinity, expressed as NaCl 2.2 " " 100.000
N.B. The Quaternary sands, which would have given a
good yield, were deliberately shutt off to avoid
pollution from the moat. The yield from the lower sands
was more than adequate for the personnel of the camp.
