Class B: Ground Investigation

The following costs are based on using Specialist Contractors and are for guidance only Establishment of standard plant and equipment and removal on completion – – – – sum 450.00 Number; 150mm nominal diameter at base – – – – nr 50.00 Depth; 150mm nominal diameter of base

in holes of maximum depth not exceeding 5m – – – – m 18.00 in holes of maximum depth 5-10m – – – – m 18.00 in holes of maximum depth 10-20m – – – – m 23.00 in holes of maximum depth 20-30m – – – – m 29.00

Depth backfilled; imported pulverized fuel ash – – – – m 5.00 Depth backfilled; imported gravel – – – – m 7.00 Depth backfilled; bentonite grout – – – – m 10.00 Chiselling to prove rock or to penetrate obstructions – – – – h 48.00 Standing time of rig and crew – – – – h 48.00

ROTARY DRILLED BOREHOLES

The following costs are based on using Specialist Contractors and are for guidance only Establishment of standard plant and equipment and removal on completion – – – – sum 1000.00 Setting up at each borehole position – – – – nr 8.00 Depth without core recovery; nominal minimum core diameter 100mm

ne 5.0m deep – – – – m 32.00 5-10m deep – – – – m 32.00 10-20m deep – – – – m 33.00 20-30m deep – – – – m 33.00

Depth with core recovery; nominal minimum core diameter 75mm

ne 5.0m deep – – – – m 70.00 5-10m deep – – – – m 70.00 10-20m deep – – – – m 78.00 20-30m deep – – – – m 88.00

Depth cased; semi-rigid plastic core barrel liner – – – – m 6.00

SAMPLES From the surface or from trial pits and trenches

undisturbed soft material; minimum 200mm cube – – – – nr 16.25 disturbed soft material; minimum 5kg – – – – nr 2.55 rock; minimum 5kg – – – – nr 10.15 groundwater; miniumum 1 l – – – – nr 4.50

Labour Total hours £ £ £ rate £

SAMPLES – cont From boreholes

open tube; 100mm diameter × 450mm long – – – – nr 16.00 disturbed; minimum 5kg – – – – nr 2.50 groundwater; minimum 1 l – – – – nr 4.00 stationary piston – – – – nr 4.00 Swedish foil – – – – nr 25.00 Delft – – – – nr 25.00 Bishop sand – – – – nr 25.00

SITE TESTS AND OBSERVATIONS

Groundwater level Standard penetration

in light cable percussion boreholes – – – – nr –

Vane in borehole Plate bearing

in pits and trenches; loading table – – – – nr – in pits and trenches; hydraulic jack and kentledge – – – – nr –

California bearing ratio – – – – nr – Mackintosh probe Hand auger borehole

mm minimum diameter; 6m maximum depth – – – – nr –

INSTRUMENTAL OBSERVATIONS

General Pressure head

standpipe; 75mm diameter HDPE pipe – – – – m 30.00 piezometer – – – – m 42.50 install protective cover – – – – nr 82.00 readings – – – – nr 20.50

LABORATORY TESTS Classification

moisture content – – – – nr 5.00 specific gravity – – – – nr 7.00 particle size analysis by sieve – – – – nr 28.30 particle size analysis by pipette or hydrometer – – – – nr 40.00

Chemical content organic matter – – – – nr 31.12 sulphate – – – – nr 21.22 pH value – – – – nr 6.84 contaminants; Comprehensive – – – – nr 247.48 contaminants; Abbreviated – – – – nr 176.86 contaminants; Mini, Screening – – – – nr 141.48 contaminants; nitrogen herbicides – – – – nr 127.34 contaminants; organophosphorus pesticides – – – – nr 106.12 contaminants; organochlorine pesticides – – – – nr 106.12

Labour Total hours £ £ £ rate £

Compaction standard – – – – nr 127.33 heavy – – – – nr 127.33 vibratory – – – – nr 141.48

Permeability falling head – – – – nr 56.59

Soil strength quick undrained triaxial; set of three 38mm diameter specimens – – – – nr 28.29 shear box; peak only; size of shearbox 100× 100mm – – – – nr 35.38 California bearing ratio; typical – – – – nr 42.45

Rock strength point load test; minimum 5kg sample – – – – nr 70.74

PROFESSIONAL SERVICES Technician – – – – hr 35.00 Technician engineer – – – – hr 47.00 Engineer or geologist

graduate – – – – hr 47.00 chartered – – – – hr 60.00 principal or consultant – – – – hr 80.50

Visits to the Site technician – – – – nr 35.00 technician engineer/graduate engineer or geologist – – – – nr 47.00 chartered engineer – – – – nr 60.00 principal or consultant – – – – nr 80.50

Overnight stays in connection with visits to the site technician – – – – nr 66.50 technician engineer/graduate engineer or geologist – – – – nr 66.50 chartered engineer/senior geologist – – – – nr 86.50 principal or consultant – – – – nr 86.50