Who Should Attend?
The interactive workshops are aimed at practising Local Authority Officers
and Scientific Officers who wish to learn more about risk assessment
techniques applied to the investigation of potentially contaminated land.
The presentations will be relevant to current and potential users/reviewers
of risk assessment software/reports.

The workshop will also allow individuals to assess risk assessment reports
and to check whether they are appropriate, the fundamental requirements
have been addressed and whether they have been conducted in accordance with
current best practices.

GeoDelft Environmental
GeoDelft Environmental is a leading international consultancy, specialising
in the provision of high quality environmental services across a wide range
of sectors. The GeoDelft group of companies employs more than 300
professional staff with a range of complementary disciplines, including
geologists, environmental scientists, hydrogeologists, toxicologists,
ecologists, civil, geotechnical and chemical engineers.

GeoDelft Environmental has extensive experience in the UK in developing and
applying quantitative risk analysis techniques, groundwater/contaminant
transport modelling and innovative engineering methods. Recognising its
importance as a means of developing investigation and clean-up strategies,
GeoDelft Environmental has made risk management the core of its service
provision.

GeoDelft Environmental includes a large quantitative risk and predictive
modelling group, able to undertake dissolved-phase and LNAPL contaminant
transport modelling, air-emission modelling, and to calculate contaminant
exposure directly to a human’s health or through the food chain from uptake
by other organisms. Our contaminant experience encompasses hydrocarbons,
PAHs, LNAPLS, PCBs, styrene’s, heavy metals, explosives, asbestos, arsenic,
methane, chlorinated solvents including DNAPL’s, phenols, cresols,
radioactive contaminants, nitrates and pesticides.

Further information can be found at www.geodelft.co.uk or by contacting Mr.
A.Czarnecki ([log in to unmask]) on Tel: 01260 299495 Fax: 01260
299856.

Basic to Intermediate DG>LEARN Workshop Outline (Day 1)
15th October 2001, Congleton

Day 1 is intended to give an understanding of the fundamental concepts in
the undertaking of a quantitative risk assessment for both human health and
controlled waters. A series of presentations will be given which will
describe the different stages of risk assessment and the practical means by
which each stage is completed.

A number of informative case studies will be introduced to illustrate the
practicalities of assessing risk on potentially contaminated sites.


9.00am – 9.15am Coffee & Registration

9.15am – 9.50am Approaches to Contaminated Land Legislation
Caveat emptor, Polluter Pays, Act, Regulation etc.
   Speaker to be announced

9.50am – 10.00am Discussion Group

10.00am – 10.45am Principles/Concepts in the undertaking of risk
assessments
Current Technical Guidance, SPT’s, Tier Methodology, Hazard Identification,
Hazard Assessment, Risk Estimation, Risk Evaluation, Management Context,
Political/Time Constraints etc.
Sarah Dack, Director, Delft Geosystems

10.45am – 10.55am Discussion Group

10.55am – 11.15am Coffee Break

11.15am – 12.00pm Hazard Identification
Development of Desk Study & Risk Assessment, Initial SPT characterisation,
Site Sensitivity, Actual Effects, Data Quality, Consultations,
Reconnaissance Surveys, Conceptual Model, Prioritisation (CLR6, Harm 3-3-3)
etc.
Sarah Dack, Director, Delft Geosystems

12.00pm – 12.15pm Discussion Group

12.15pm – 13.00pm Hazard Assessment (Preliminary Investigation)
Quality/confidence objectives, sampling, geostatistics, trial/pitting,
drilling methods, geophysics, aerial, monitoring, drainage surveys, falling
head tests, groundwater regime, TOC testing, geotechnical parameters,
methane etc.
   Adam Czarnecki, Client Manager, GeoDelft
Environmental

13.00pm – 13.15pm Discussion Group

13.15pm – 14.00pm Lunch Break

14.00pm – 14.45pm Risk Estimation Using an Iterative Tiered Approach
Calculation of generic & site-specific risk, exposure concentration, dose,
exposure duration and mechanisms, uncertainties, data gaps, possible
further investigations etc.
Brian Nicholson, Risk Manager, GeoDelft Environmental

14.45pm – 15.00pm Discussion Group



15.00pm – 15.45pm Risk Estimation & Evaluation for Controlled Waters
Derivation of clean up-levels, P20 EA Methodology, relevant standards,
scale effects, EASM, uncertainties, sensitivity analysis, Monte-Carlo
simulations etc.
   Sarah Dack, Director, Delft Geosystems

15.45pm – 16.00pm Discussion Group/Coffee Break

16.00pm – 16.45pm Risk Estimation & Evaluation for Human Health
Derivation of clean up-levels, vegetable uptake, permeation, Risc-Human,
RBCA, CLEA, Risk*Assistant, sensitivity analysis, Monte-Carlo simulations
etc.
Brian Nicholson, Risk Manager, GeoDelft Environmental

16.45pm – 17.00pm Discussion Group

17.00pm – 17.30pm Overview of Day 1 and dissemination of Case History
sheets for Day 2
 Walter Robertson, Director, GeoDelft Environmental

18.00pm onwards Meal at local Chinese Restaurant (optional)

Basic to Intermediate DG>LEARN Workshop Outline (Day 2)
16th October 2001, Congleton

Day 2 is intended to be an interactive workshop using real site data from a
series of sites previously investigated by GeoDelft Environmental.

The delegates will be split into two separate groups with full access to
software and Internet facilities.

The delegates will be presented with information enabling them to construct
a Conceptual Site Model of the environmental setting of each site.
Information sources relating to the local geology, hydrogeology, laboratory
data, site investigation data, aerial surveys, reconnaissance surveys,
historical development of the site and current/proposed land use practices
will be available to each member of the respective group.

Each group will be given the opportunity to perform a Tier 1 & Tier 2 human
health risk assessment by use of GeoDelft software (Tier 1), SNIFFER worked
examples, Risc-Human and risk-based corrective action modelling using the
chemical releases RBCA Toolkit.

9.00am – 9.15am Coffee

9.15am – 10.30am Development of Conceptual Site Model (both groups)
and formulation of pollution linkages
 Means of presentation, likely/unlikely scenarios


10.30am – 11.30am Discussion Group

11.30am – 12.30pm Session 1Tier 1/2 human health risk assessment
(both groups)
Generic risk assessments, Dutch InterventionValues, ICRCL tables, SNIFFER,
Risc-Human, toxicological information sources, risk-based screening levels
etc.
Examples to include two petrol stations, former railway siding, colliery
and a scrapyard.

12.30pm – 13.00pm Lunch Break

13.00pm – 14.30pm Session 1Tier 1/2 human health risk assessments
(both groups) continued

14.30pm – 15.30pm Controlled Water risk assessment (both groups)
   P20 Methodology (Tier1/2)

15.30pm – 15.45pm Coffee Break

15.45pm – 16.45pm Discussion of different Model & Group outputs

16.45pm – 17.30pm Discussion Group
Chairperson, Walter Robertson, Director, GeoDelft Environmental
   Question and answers
   Gas risks?
   What should be in a risk assessment?
   What actions should be taken?
   How do we deal with uncertainty?
   Tier 3 models?
   Ecological models are there any?