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Initial Site Assessment - Walkover

by Geosphere Environmental Ltd
by

Tom Powling

on 11 November 2014

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Transcript of Initial Site Assessment - Walkover

INITIAL SITE ASSESSMENT - THE WALK VER
GEOSPHERE ENVIRONMENTAL LTD
present
The CPD aims to show clients what characteristics and conclusions can be drawn from the simplest of assessments - the WALKOVER
* from a clients
perspective
Q. What is a Walkover?
A. Literally walking over the site with/without a clipboard.
Q. Who is qualified to do a walkover?
A. Anyone with/without a
clipboard
Q. Who would benefit by undertaking a walkover?
A. Landbuyers
Land Owners
Developers
Site Assessors
Technical Staff
Contracts Managers
Consultants
etc, etc, etc
Q. Who actually does their own walkovers?
Q. What purpose are they for?
What do you need for a decent walkover?
A. Eyes
Common sense
Clipboard
Phone / Camera
Team Exercise 2
Planning and Design Related
Noise
Neighboring sites
Traffic Management
Views / obstruction of
Light generation
Contaminated Land
Evidence of site history
Visible sources of contamination
Likely types of contamination
Surrounding land uses
Demolition Issues
Geotechnical
Current Structures
Exposed soils
Tree presence
Subsidence
Standing water / flooding

Ecology
Arboricultural Issues
Potential habitats of concern
Actually see problem species
Indications of possible issues (dropping, paths, structural damage, etc)
Construction Related
Size
Access
Slopes
Phasing
Location
Constraints
Q. What Information can Walkovers provide?
We are going to focus on:

Contaminated Land
Ecology
Geotechnical
Walkover Focus:
Contaminated Land
These focus topics hinge on staples of the last CPD:
Once you can identify issues - out can effectively plan and prepare for them.
The same issues affect similar sites (and look the same)
You only need common sense.
Evidence of Site History
Visible Sources of Contamination
Walkover Focus: Ecology
Team Exercise 1
As a group - choose someone to fill in your answer sheet
Say hello to your Geosphere representative
Answer the questions
The most common ecological problems can be guessed at early on by identifying key features
If you had the following features on a site,
what might you expect could be an issue?
Walkover focus: Geotechnical Issues
If geotechnical issues were present you would be looking for.....?
Cracks
Subsidence
Standing water
Fracturing
Slope collapse
Wash outs
Etc.
Team Exercise 3:

In your teams, and with your Geosphere representative, there are seven locations around the Brightwell Barns site that need a walkover assessment.

List as many issues as you can, some will be repeated, some have been covered and some have not. Each location will have one element to spot that will have bonus points attached.
Scores will be checked and the winning team will get prizes!
Walkover Exercise Answers:
Location A
Location A
Note for speaker there is no photo as the actual location is to the left.
Points of note:
trees
large stockpile
quarry next door
Bonus Item:
nesting birds
potential for knotweed
Location B
Location C
Location D
Location E
Location F
Location G
Location B
Points of note:
trees
large stockpile
pond - geotech
different soils - grass variation
pond - GCN
Bonus Item:
grass split - one area different to the other - evidence for investigation?
Location C
Points of note:
cracks in concrete
made ground
historical industrial use - frame visible
stockpile
demolition waste
Bonus Item:
former AGST base
Location D
Points of note:
evidence of burning
asbestos (on ground)
made ground
stockpiles
Bonus Item:
trees
knotweed potential
industrial next door
Location E
Points of note:
asbestos on floor
asbestos on roof
waste drums
demolition waste
concrete and wall cracks
quarry next door
Bonus Item:
potential for knotweed
industrial usage
gas generating run off
hopper
made ground
Location F
Points of note:
trees
concrete cracks
asbestos on buildings
general waste
Bonus Item:
Archaeological mound
Location G
Points of note:
trees
demolition waste
level change
quarry next door
oil tank
Bonus Item:
evidence of previous investigation
Asbestos roof on adjacent building
potential for biological issues
subsidence
former structures
asbestos on buildings
made ground
Any questions?
Thank you for your time!
Please ask us for a quote!
And the winning team is.....
http://www.geosphere-environmental.co.uk
Full transcript