Groundwater and drainage
Where the water is, which way it moves and whether it stays clean.
Where the water was found
From the log for the former bus depot: struck in the clay, standing higher, and the gravel that carries it (sample).
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Depth (m)
Layer as logged
Samples and tests
What it means for the site
1.80–4.50 m
Clay
Firm brown silty clay, mottled grey. Water struck at 3.20 m ▽, rose to 2.60 m ▼ in 20 minutes.
S3 at 2.50 m: no odour, kept for testing
A tight layer that slows anything in the made ground on its way down to the gravel.
4.50–7.20 m
Sand and gravel
Wet orange-brown sand with flint gravel.
Monitoring well screened from 4.50 to 7.00 m; water sampled every month
The groundwater that feeds the brook downstream. We check that it stays clean (sample).
Topsoil Made ground Clay Sand and gravel Mudstone ▽Water struck ▼Water level after 20 minutes
Depths in metres below ground level. The core is drawn to scale; the rows say what the drill found and what it means for the new homes planned on the site (sample log).
Monitoring visits
Wells are visited on a schedule the council agrees, often monthly for three to six months.
Levels
Depth to water in each well, to see which way it flows
Gas
Methane, carbon dioxide and oxygen at each well head
Samples
Purged and sampled with low-flow pumps, sent to the lab the same day
Report
A short letter after each round and a full report at the end
Send us the site address
We check the old maps and the planning record before we reply, so the quote fits the site. Most quotes go out within two working days (sample).