1 Introduction

COTSWOLDS GROUNDWATER MODEL DEVELOPMENT – CALL OFF FROM FRAMEWORK REFERENCE 22344 GROUNDWATER RESOURCE MODELLING, GEOLOGICAL INVESTIGATIONS & HYDROGEOLOGY / HYDROLOGY SERVICES

INVITATION TO BID

BID REFERENCE: 26044

The Environment Agency South East Region Kings Meadow House Kings Meadow Road Reading Berkshire RG1 8DQ

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BID REF: 26044 INSTRUCTIONS TO BIDDERS INSTRUCTIONS TO BIDDERS

1 INTRODUCTION

You are invited to bid for the undertaking of the Cotswolds Groundwater Model Development within the South East Region of the Environment Agency in accordance with the enclosed documents (‘The Documentation’) comprising:

• Instructions to Bidders • Acknowledgement Form • Bid Return Label • Form of Offer • Draft Form of Agreement • The Scope • Contract Data (Parts One & Two) – NEC3 Professional Services Contract (June 2006) • Activity Schedule

Some or all of the Documentation may be set out in the form of a draft contract, intended to apply if the Environment Agency were to accept a Bid. Therefore references in the Documentation to “the Consultant” are, for the purposes of this invitation, references to any Bidder who may be awarded a contract.

However, neither this Invitation to Bid nor the Documentation constitute an offer by the Environment Agency to enter a contract.

The Agency will not accept any liability for costs incurred, or work done, by any Bidder at any time in anticipation of being awarded a contract in relation to any response to this Invitation To Bid.

2 DOCUMENTATION

2.1 Copyright and Confidentiality

Unless otherwise indicated, the copyright in all of the Documentation belongs to the Environment Agency, and the Documentation is to be returned to the Agency with your bid. The contents of the Documentation must be held in confidence by you and not disclosed to any third party other than is strictly necessary for the purposes of submitting your bid. You must also ensure that a similar obligation of confidentiality is placed upon any third party to whom you may need to disclose any of the Documentation for the purposes of the bid.

2.2 Accuracy of Documentation

You should check the Documentation; should any part be found to be missing or unclear you should immediately contact the Environment Agency at the address given in the covering letter. No liability will be accepted by the Agency for any omission or errors in the Documentation which could have been identified by you.

2.3 Amendments to Documentation Cotswolds Groundwater Model Page 1 of 4 Environment Agency PROTECT COMMERCIAL – WHEN COMPLETED BID REF: 26044 INSTRUCTIONS TO BIDDERS

Prior to the date for return of bids, the Agency may clarify, amend or add to the Documentation. A copy of each instruction will be issued by the Agency to every Bidder and shall form part of the Documentation. No amendment shall be made to the Documentation unless it is the subject of an instruction. The Bidder shall promptly acknowledge receipt of such instructions.

3 SCOPE OF SUPPLY

The South East Region of the Environment Agency intends to award a single contract for the development of a conceptual and numerical groundwater model simulating groundwater flow covering the outcrop of the Great and Inferior Oolite aquifers, as well as part of the confined aquifer where there are several large public water supplies, that is beneath the Thames Valley. It covers the catchments gaining baseflow from the major aquifers, that is the upper Thames, Churn in the west to the Evenlode and Glyme in the east. Contributions to river flows from the overlying minor aquifers need also to be considered.

Along the western boundary the upper Frome catchment should be included as significant quantities of groundwater are captured from the Thames surface water catchment, forming springs along the Frome particularly at Chalford.

On completion of the conceptual model the Consultant shall discuss with the Environment Agency their proposals for constructing and testing a historical numerical model. The Agency Project Manager will require agreement on the proposed method for developing and refining the model prior to commencement of a numerical model. It is at the Agency’s discretion whether to proceed beyond the conceptual phase.

4 BID RESPONSE

4.1 Structure

Your bid response (3 copies) should contain the information called for below:

• your company’s full name and address, (with whom a resulting contract may be placed) to be shown in the ‘Contract Data - Part Two’, together with the address of your registered office and company registration number;

• a statement of compliance with the provisions and requirements contained in the ‘Contract Data - Part One’;

• the address of the office location(s) from which the services are to be provided, including details of any proposed subconsultants;

• firm prices in sterling and completion dates for the services to be shown in section 1 of the ‘Activity Schedule’;

• fixed staff rates, the names of the key persons, their jobs and responsibilities to be shown in sections 2 & 4 of the ‘Activity Schedule’;

• fixed expenses to be shown in sections 3 & 4 of the ‘Activity Schedule’;

• Curricula Vitae detailing qualifications and experience of the key persons nominated to perform the services; Cotswolds Groundwater Model Page 2 of 4 Environment Agency PROTECT COMMERCIAL – WHEN COMPLETED BID REF: 26044 INSTRUCTIONS TO BIDDERS

• a statement of compliance with the provisions and requirements contained in the ‘Scope’ showing details of any partial or non compliances;

• a programme detailing the timescales and sequence for performing the services in according with the completion dates shown in the ‘Activity Schedule’;

• a Method Statement detailing the methodology of meeting the requirements of the ‘Scope’ and managing the contract, including how you propose to allocate adequate resources and appropriate key persons to the specific activities;

• a description of any risks and actions to avoid or reduce such risks to be listed in the Risk Register to be notified as an early warning matter;

• details of your quality plan / quality control procedures relevant to supplying the services;

• details of any specific Health & Safety risks perceived by yourselves in performing the services required and how you will mitigate them;

• the attached ‘Form of Offer’ statement completed, signed and dated.

4.2 External Reference Material

Where any external reference material, such as brochures, specifications and system descriptions, is used to support a bid response, any statements within the reference material which may allow change to obligations or reduce liability, such as "specifications subject to change without notice", or other disclaimers will be regarded as void.

4.3 Cross References

Where a particular section of the response submitted by a Bidder relates to information given in another section or in external reference material, then the Bidder shall ensure that the response is clearly cross- referenced.

5 ALTERNATIVE OFFERS

Alternative offers will only be considered if they constitute a fully priced alternative and are submitted in addition to a Bid complying with the requirements specified in the ITT documents. Alternative offers must contain sufficient supplementary information, drawings and data to permit a complete evaluation to be made.

6 FREEDOM OF INFORMATION ACT

The Environment Agency is committed to open government and to meeting its responsibilities under the Freedom of Information Act 2000. Accordingly, all information submitted to us may need to be disclosed by us in response to a request under the Act. We may also decide to include certain information in the publication scheme which we maintain under the Act. If you consider that any of the information included in your bid, or any other information that you have submitted, is commercially sensitive, please identify it and explain (in broad terms) what harm may result from disclosure if a request is received, and the time period applicable to that sensitivity. You should be aware that, even where you have indicated that information is commercially sensitive, we may be required to disclose it under the Act if a request is

Cotswolds Groundwater Model Page 3 of 4 Environment Agency PROTECT COMMERCIAL – WHEN COMPLETED BID REF: 26044 INSTRUCTIONS TO BIDDERS received. Please also note that the receipt of any material marked ‘confidential’ or equivalent by the Agency should not be taken to mean that we accept any duty of confidence by virtue of that marking. If a request is received, we may also be required to disclose details of unsuccessful bids.

7 AWARD OF CONTRACTS

Award of contracts will be on the basis of the most economically advantageous offer having regard to:

Criteria • price • method statement • experience & capability of key persons • resource allocation • programme • quality assurance • health & safety considerations

The Agency shall be under no obligation to award a contract for all or any part of the requirement set out in the Invitation to Bid, to any Bidder or at all.

Any resultant contract will be made by the Agency issuing an acceptance letter and form of agreement to the successful Bidder.

Bidders may be required to answer any Agency queries on their proposal and to attend formal meetings with the Agency during the bid evaluation period.

Bids shall be valid for acceptance for a minimum period of 60 days from the date for return of the Bid, and thereafter unless withdrawn in writing.

8 RETURN OF BIDS

The Bidder shall deliver the Bid to the Agency at the address shown and not later than the time and date stated in the covering letter. The Agency may, in its absolute discretion, extend the closing date and time.

Bids received after the closing date will not be considered.

Cotswolds Groundwater Model Page 4 of 4 Environment Agency PROTECT COMMERCIAL – WHEN COMPLETED BID REF: 26044 ACKNOWLEDGEMENT FORM ACKNOWLEDGEMENT FORM

BID REF: 26044

FOR COTSWOLDS GROUNDWATER MODEL DEVELOPMENT

TO: The Environment Agency Kings Meadow House Kings Meadow Road Reading Berkshire RG1 8DQ

Tel: Fax: Email:

We hereby acknowledge receipt of the above mentioned Invitation To Bid and confirm that we [ will / will not ]* be submitting a bid by the due date. (*delete as appropriate).

Signed: ______Name: ______Position: ______Dated: ______

For and on behalf of: ______

Tel No: ______Fax No: ______Email: ______

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Cotswolds Groundwater Model Page 2 of 2 Environment Agency PROTECT COMMERCIAL – WHEN COMPLETED BID REF: 26044 BID RETURN LABEL BID RETURN LABEL

BID REF: 26044

Cotswolds Groundwater Model Development

Regional Procurement Manager Environment Agency - South East Region Kings Meadow House Kings Meadow Road Reading RG1 8DQ

BIDS DUE: 2:00pm Tuesday 2nd August 2011

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Cotswolds Groundwater Model Page 2 of 2 Environment Agency PROTECT COMMERCIAL – WHEN COMPLETED BID REF: 26044 FORM OF OFFER FORM OF OFFER

TO: THE ENVIRONMENT AGENCY

BID REF: 26044

FOR COTSWOLDS GROUNDWATER MODEL DEVELOPMENT

We hereby offer to fulfil the requirements specified in the Invitation to Bid, at the rates, prices, and other details contained in our Bid, and subject exclusively to the terms and conditions contained or referred to in the Draft Contract.

We agree that any other terms and conditions or any general reservations which may be endorsed on any correspondence or other documents from us in connection with this bid shall not form any part of our offer.

This offer shall remain open without time limitation, and will not be withdrawn before giving you not less than 14 days prior written notice.

We certify that: a) This is a bona fide offer and, subject to the exceptions contained in the Instructions To Bidders, is not made in conjunction with any third party; b) The fact of, and details of our Bid have not been, and will not during the currency of this offer be, communicated to any third party.

Signed: ______Name: ______Position: ______Dated: ______

Duly authorised to sign bids for and on behalf of:

______

Tel No: ______Fax No: ______Email: ______

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Cotswolds Groundwater Model Page 2 of 2 Environment Agency PROTECT COMMERCIAL – WHEN COMPLETED BID REF: 26044 FORM OF AGREEMENT (DRAFT) DRAFT FORM OF AGREEMENT

CONTRACT No: 26044 ESTIMATED CONTRACT VALUE: [ ] (Exclusive of VAT)

CONTRACT RELATING TO: the undertaking of the Cotswolds Groundwater Model Development and other services.

CONTRACT dated [ ] between :

(1) The Environment Agency - South East Region whose regional headquarters is at Kings Meadow House, Kings Meadow Road, Reading, Berkshire RG1 8DQ (“the Employer”); and

(2) [ ] whose registered office is at [ ] and whose registered number is [ ] “(the Consultant”).

IT IS AGREED as follows:

1. The provisions of the following documents form part of this contract:

• the attached ‘Contract Data ⎯ NEC3 Professional Services Contract (June 2006)’;

• the attached ‘Scope’;

• the attached ‘Activity Schedule’

• the over arching framework agreement for Groundwater Resource Modelling, Geological Investigations & Hydrogeology / Hydrology Services, contract ref 22344, dated 9th April 2009.

and which, in the case of conflict, have precedence in the order listed.

2. In consideration of the Employer’s obligations under this contract, the Consultant shall complete and deliver to the Employer such goods and/or services and/or such work (as the case may be) as the Employer may order from time to time within the contract period in accordance with and subject to, the provisions of this contract.

3. NO VARIATION TO THIS CONTRACT SHALL HAVE EFFECT UNLESS AGREED IN WRITING BY AN AUTHORISED OFFICER OF THE EMPLOYER.

Signed for and on behalf of the Consultant: Signed for and on behalf of the Employer:

Signature: ...... Signature: ......

Name: ...... Name: ...... (BLOCK CAPITALS) (BLOCK CAPITALS)

Position:...... Position:......

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Cotswolds Groundwater Model Page 2 of 2 Environment Agency PROTECT COMMERCIAL – WHEN COMPLETED BID REF: 26044 SCOPE SCOPE COTSWOLDS GROUNDWATER MODEL DEVELOPMENT

INTRODUCTION

Preamble The Cotswolds comprise a series of aquifers and support a number of public water sources, and wetland sites linked to Catchment Abstraction Management Strategies (CAMS) / Water Framework Directive (WFD). It is a complex area because of the geology, hydrogeology, and faulting, combined with having an ill defined relationship with groundwater drainage to the River Severn.

In 2008-9 the Environment Agency commissioned British Geological Survey (BGS) to undertake a study of the hydrogeology of the western boundary of this proposed study area, providing a conceptual understanding of the western boundary area between the source of the Thames, the River Churn and the River Frome.

The model will principally cover the Burford Jurassic groundwater body, which is currently at ‘Poor Status’ under the Water Framework Directive. The model will improve the strategic assessment of water resources by providing accurate estimates of natural and ‘actual’ flows at ungauged sites and by assessing the impact of numerous well-established public water supply boreholes. The new numerical model will provide a sound evidence-based tool to support the strategic assessment of the available water resources and water abstraction licensing decisions.

Purpose of the Study The study must provide the Environment Agency with a conceptual and numerical model that will allow:

1 Strategic Water Resource Assessment Future WFD assessments including Classification, Programme of Measures and CAMS.

2 Abstraction Licensing Assessment The assessment of current and future groundwater and surface water abstractions with the aim of balancing the needs of the environment, abstractors and riparian interests.

3 Zone Delineation Improve the accurate delineation of source protection zones (ongoing review), and future safeguard protection zones. These zones are important tools which the Environment Agency uses to implement its Groundwater Protection: Policy and Practice (GP3) requirements. The zones are used to inform decisions on planning applications, environmental permitting, Catchment Sensitive Farming initiatives, mineral extraction, waste management and pollution prevention initiatives.

4 Climate Change Assessment Assessment of the likely impacts of future climate change scenarios on groundwater resources, spring discharges and river flows. It will provide a robust tool to support drought planning and licensing decisions previously outlined in the abstraction licensing objective (above).

5 Protection of the Natural Environment Assessment of groundwater and surface water flow patterns at nationally and internationally designated sites, such as the North Meadow and Clattinger Special Areas of Conservation.

6 Conceptual Uncertainties Cotswolds Groundwater Model Page 1 of 14 Environment Agency PROTECT COMMERCIAL – WHEN COMPLETED

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Improved understanding of groundwater interaction between the Great and Inferior Oolite and surface waters, and the groundwater divide between the Thames, Avon and Severn catchments.

The appointed Consultant will be expected to undertake the tasks as outlined in Chapter 2 to enable the Environment Agency to address these issues. To ensure that the work is completed to a sufficiently high standard it is proposed that the Study is monitored by a Project Review Panel, staffed by senior personnel from the Environment Agency (South East Region), water undertakings and an independent modelling expert. The independent modelling expert will have to confirm that the model is fit for purpose, and that it is of a quality that can be capitalised.

Study Area The study area covers the outcrop of the Great and Inferior Oolite aquifers, as well as part of the confined aquifer where there are several large public water supplies, that is beneath the Thames Valley. It covers the catchments gaining baseflow from the major aquifers, that is the upper Thames, Churn in the west to the Evenlode and Glyme in the east.

The numerical model should be structured to enable extension of the model to the south west to approximately Bath (e.g. the modflow model grid and recharge model grid). This area already has some conceptual understanding and South West Region may seek to fund part of the numerical model extending beyond South East Region.

Available Information The Environment Agency has various sources of data and information available, which could be useful in developing an understanding of the aquifer system as well as the type of model required. These include groundwater levels, river flows, aquifer properties etc (this list is not exhaustive). A numerical model report will be available for the Oolite aquifers in the Malmsbury-Tetbury Avon area which may be informative for conceptual and numerical model development in our study area to the north east.

A figure showing the general study area is attached (Figure 1). It should not be considered as an absolute area. The conceptual study should inform the exact boundaries. The red line shows the area for which costs are to be submitted in bidders’ proposals.

The yellow line is for information only, representing the potential future extension of the model to the south west. The blue line shows the area included in the Stroud-Cirencester Aquifer Study by the British Geological Survey for the Environment Agency (2008), and the green line shows the area included in the Malmsbury-Tetbury Avon modelling study (2005), both of which will be available to review.

PROJECT STRUCTURE

The Environment Agency envisages that the Study will comprise the following components of work:

Phase I: Part A Data collation, analysis and presentation Part B Formulation of conceptual model. Phase II: Development and refinement of the historical model, creation of naturalized and fully licensed scenarios and configuration to the Environment Agency’s National Groundwater Modelling System.

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PHASE I, DATA COLLATION AND FORMULATION OF CONCEPTUAL MODEL Phase I will comprise the following twelve tasks:

Task 1: Study Inaugural Meeting The Study will be launched at an inaugural meeting, to be held at the Environment Agency offices in Wallingford (Red Kite House) and attended by two senior representatives of the Consultant’s project team (the Project Manager and Senior Modeller) and the Project Review Panel. Bidders are expected to indicate what they consider to be the key items to discuss and to examine during the meeting.

PART A DATA COLLATION, ANALYSIS AND PRESENTATION

Task 2: Data Collation Purpose: The study area is defined in Figure 1 and the main study period will be from 1970 to 2010. It is proposed that the numerical model that will be based on this conceptual work shall be capable of adequately representing historical aquifer and river-flow conditions for the period 1970 to 2010. Data collection and collation will concentrate on the study area and the time period 1970 to 2010 although it may be necessary to obtain some information for a larger area and cover a longer time period.

Approach: The collation of geological, hydrological and hydrogeological information available and relevant to the study area and study period will primarily be the responsibility of the Consultant, though Environment Agency and water company staff will assist with the collation of in-house data where the task does not impinge on their other work commitments.

Where data is available from the Environment Agency, then this will be provided at no additional cost to the Consultant. However, where data is to be provided by a source external to the Agency and the Consultant, then this will be purchased by the Consultant. Bidders shall make provisions within their bids for the acquisition of data. Any data obtained as part of this Task shall remain the exclusive property of the Environment Agency.

Bidders are expected to demonstrate an awareness of the various issues that are likely to arise during this extensive data search. Any possible additional sources of data should also be mentioned (but not costed) in the bids.

Where appropriate the Consultant will enter or import the raw data into Excel compatible spreadsheets to enable later presentation of the data or further analysis. These spreadsheets shall be passed over to the Environment Agency at the end of the project.

Outputs: As an absolute minimum the Consultant will be expected to have acquired, inspected and quality assured the following data covering the above stated study period (please assume that you will undertake a significant portion of this quality assurance and data checking, some input from the Environment Agency will be available): 1) The most recent topographic (1:25,000 and 1:50,000), geology (1:10,000 and 1:50,000) and soils maps, mineral assessment reports and memoirs for the study area (available from British Geological Survey in Keyworth).

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2) Daily rainfall for a number of Meteorological Office rainfall stations, the number and choice to be agreed with the Environment Agency (data generally available as ASCII files from the Environment Agency);

3) Potential and actual evapo-transpiration (monthly/weekly figures distributed on a daily basis) shall be available for two or more Meteorological Office climate stations;

4) Parish Crop Returns for a number of sample parishes, the number and choice to be agreed with the Environment Agency (data available as hard copy from either the Public Record Office or MAFF - Statistics Section or Environment Agency datasets) (Satellite data for crop types are available for the study area);

5) Daily river-flow records and river level data (where available) for permanent, current and disused gauging sites. Description of numbers per catchment are provided in the attached hydrometric summary. Data are available as chart records and ASCII files from the Environment Agency;

6) Occasional current-meter gauging surveys along low-flow sections of the river network during summer conditions (hard copy summary records are available from the Environment Agency);

7) Current and historical licensed abstraction quantities (annual, daily and peak daily and hourly) and actual monthly groundwater abstractions for all public water abstraction sites. Data are available variously in electronic and hard copy formats from the Environment Agency. The Agency abstractions dataset is in the order of several hundred abstractions to process and potentially incorporate to the model;

8) Groundwater levels. Description of numbers per catchment are provided in the attached hydrometric summary. Data are available as chart records and ASCII files from the Agency;

9) Interpretations of the results of earlier pumping tests and borehole geophysical and/or fluid logging in the area (records from the Environment Agency). The Consultant is expected to confirm the results of pumping tests or undertake his own analysis of pumping test data;

10) Additional information on aquifer properties may be available from British Geological Survey's Aquifer Properties Manual;

11) Lithological logs for the Solid and Superficial deposits are available from the Environment Agency (incomplete) and/or British Geological Survey in Keyworth and Wallingford.

Task 3: Literature Review Purpose: Information about the study area is available in reports and other forms of literature associated with the study area. The literature review is to provide a comprehensive summary of the contents of all the relevant literature. Not only is the review important for the current project but it will also provide a valuable long term resource for the Environment Agency.

Approach: The Consultant will be expected to examine reports and papers as appropriate. Sources of reference material include papers in published journals, geological memoirs, water company and Environment Agency reports (and those of the Environment Agency’s predecessor organisations), university theses and reports, reports of contractors, maps (geological, hydrogeological, topographical, soils, mineral

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BID REF: 26044 SCOPE assessments, etc.), BGS interpretation of the western part of the study area, the Malmsbury-Tetbury groundwater model, and an internal appraisal of the hydrometric situation in the Cotswolds. A literature review should include: (a) A list of all the available literature (b) A brief summary of the contents of each item (c) Important information or insights in the main text of the report when references have a particular relevance to the current study (d) Critical yet constructive comments about the important contributions.

Outputs: A brief summary of each key reference will be presented by the Consultant as an Appendix to the report.

Task 4: Geological Interpretation of Lithological Logs Purpose: The Consultant shall utilise the lithological logs together with various geological and topographical maps, memoirs and mineral reports to develop an understanding of the geology and to define the hydrogeological units.

Approach: The borehole records acquired by the Consultant during Task 2 should be entered into a database to enable visualisation of the Solid and Superficial deposits in aerial plan and cross-section. The Environment Agency shall be consulted as to the database format required to ensure compatibility with any existing database. The resulting data set must be made available to the Agency at the end of the project.

Bidders will be required to explain in their proposals how the issue of limited or conflicting evidence will be resolved.

Outputs: During this activity the Consultant shall incorporate the following BGS information such that the conceptual study report comprises the complete understanding (removing the need to refer frequently to the BGS report):- 1) Contours of the base of each aquifer unit; 2) Contours of the top of each aquifer unit; 3) Contours of the thickness of the aquifers; 4) Solid and drift geology maps for the study area; 5) A sufficient number of geological cross-sections to adequately understand the aquifer system.

The Consultant shall produce 1:50,000 scale maps with Ordnance Survey background information as well as cross-sections with a horizontal scale of 1:50,000 to show the geological interpretations. All map overlay images will be maintained in shape files compatible with ARCGIS for later use by the Environment Agency. Both the maps and cross-sections shall show the same current BGS classification for colouring, ornamentation and stratigraphy. The maps shall post the lithological log sites and the corresponding depth/height value used in the interpretation, while the cross-sections shall show all lithological logs with either full or annotated descriptions. The Consultant shall produce a 1:50,000 scaled map showing the locations of all cross-sections. The scale of the maps will be reviewed to ensure that the information illustrated is visible and of a high quality.

PART B FORMULATION OF CONCEPTUAL MODEL

Task 5: Groundwater Level Analysis Purpose:

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Insights into the long term and short term response of the aquifer to inflows and outflows of the aquifer system can be gained from an examination of the groundwater head hydrographs. Information can also be gained about the horizontal and vertical flow components. The purpose of this task is to examine all the groundwater head information to assist in the development of the conceptual model and to provide a data base against which the adequacy of the groundwater model can be assessed. In examining the groundwater head hydrographs it must be recognised that the response can be influenced by the construction of the borehole (e.g. the length of the open section), the geological structure in the vicinity and the effect of nearby water bodies, pumped boreholes etc.

Approach: All groundwater head hydrographs shall be inspected and a full understanding of the hydrograph will be presented. Each description should indicate the quality of record as well as identify and explain influences and significant variations to the hydrograph, especially in terms of seasonal and climatic changes in rainfall, abstraction as well as aquifer properties (e.g. transmissivity, storage). The hydrograph shall be quality checked and any anomalies shall be corrected or removed following agreement with the Environment Agency Project Manager. Anomalous hydrographs shall be compared to adjacent hydrographs to identify any anomalies or inconsistencies. This will be done by the comparison of hydrographs and not by inspection of contouring. The description for each hydrograph shall also detail a summary of this grouped comparison. In assessing the significance of the hydrographs, a description shall be presented of horizontal and vertical flow patterns and hydraulic gradients.

Outputs: Plots of all groundwater head hydrographs using at the most three vertical scales. Any lines drawn through field data should be discontinuous where data are missing. Contours for various times throughout the refinement period shall be prepared. At a minimum all contours for the following periods shall be included and supplied as 1:50,000 maps and shape files compatible with ArcGIS:- 1) contours for the climatic wettest year; 2) contours for the climatic driest year; 3) contours for an average year; and, 4) contours for the first and last year of the study period.

The Consultant shall provide an audit of any changes made to the data together with reasons for the changes. The audit shall document all Environment Agency Project Manager approvals relating to the correction or removal of data. The Consultant shall draw on the lines of maximum, minimum and average water tables or piezometric heads for each of the cross-sections produced in Task 4.

Introductory Comments on Tasks 6 to 8 Tasks 6 to 8, Calculation of Effective Rainfall and Estimation of Actual Recharge, River Flow Analysis and Preparation of Preliminary Water Balances, are all part of understanding and quantifying the flow processes within the aquifer system. There will be uncertainties when carrying out these tasks, especially when interaction between groundwater and surface water is involved. Nevertheless, it is essential to attempt to quantify the processes (acknowledging the uncertainties) so that a decision can be made as to whether there is sufficient information and understanding to proceed with modelling.

Task 6: Calculation of Effective Rainfall Purpose: An important part of the study is to understand and quantify the runoff and recharge processes so that the total catchment response (both surface water and groundwater) is represented. Therefore the first step is Cotswolds Groundwater Model Page 6 of 14 Environment Agency PROTECT COMMERCIAL – WHEN COMPLETED

BID REF: 26044 SCOPE to identify the nature of the flow processes close to the ground surface and soil zone and also from the bottom of the soil zone to the permanent water table. The approach should consider both rural and urban areas. Conceptual models should be developed for the different types of conditions that can occur. All possible conditions should be considered such as near surface drainage, the possibility of runoff subsequently recharging the aquifer, the ability of the aquifer to accept the water, leakage through drift, etc.

Approach: The calculation of effective rainfall and potential recharge is an important 'first-step' in the estimation of both rainfall recharge and runoff. Bidders shall describe in their proposals how they intend to use the rainfall, potential evapo-transpiration (Catchmod areal, MOSES, CERF etc), soils and land-use data collected earlier to calculate effective rainfall (potential recharge) on a daily (not monthly) basis over the previously defined study period (e.g, Environment Agency recharge calculator, 4R).

Outputs: The Consultant shall produce 1:50,000 scaled maps with OS background information showing all rainfall and climate station locations. The maps shall include all current and disused sites (the disused sites will be those being active during the refinement period) and shall be annotated accordingly. If in the Consultant’s opinion this scale needs to be reviewed, then this should be discussed with the Environment Agency’s Project Manager. The Consultant shall also indicate how the actual recharge will be estimated. Special reference must be made to areas where the water table is deep, where the water table is high, when superficial deposits are present, and the influence of surface water/groundwater interactions.

Task 7: River-flow Analysis Purpose: River flow analysis is required in parts of this study area. Appropriate studies in relevant areas are needed, where these have an impact upon the model.

Approach: The daily river-flow records from the permanent gauging stations will be analysed using conventional baseflow separation techniques to establish the monthly baseflow and runoff contributions to each of the main water courses during the period of historical simulation. River and groundwater levels and drift geology shall also be inspected to identify areas of active surface water infiltration. Appropriate Environment Agency hydrologists must be consulted in this work to ensure internal Agency consistency.

Each surface water hydrograph will be inspected and a full understanding of the hydrograph will be presented. Each description shall indicate the quality of record and explain significant variations to the hydrograph, especially in terms of seasonal and climatic changes in rainfall, abstractions (either surface or groundwater) as well as artificial influences (e.g. effluent returns). The hydrograph shall be quality checked and any anomalies corrected or removed following agreement with the Environment Agency Project Manager. The Consultant shall provide an audit of any changes made and reasons for the changes. The audit shall document all Environment Agency Project Manager approvals relating to the correction or removal of data.

Outputs: The Consultant shall produce 1:50,000 scaled maps with OS background information (highlighting the river network) showing all surface water hydrometric locations. The maps shall include all current and disused gauging stations and current metering sites and will be annotated accordingly. If in the Consultant’s opinion this scale needs to be reviewed, then this must be discussed with the Environment Agency Project Manager.

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BID REF: 26044 SCOPE

The Consultant shall review the need for and carry out as appropriate a river bed level survey and incorporate it onto the Environment Agency’s GIS system. In his proposal the Consultant shall demonstrate that he has an awareness (and an acceptance) of the problems that this Task is likely to involve.

Task 8: Calculation of Preliminary Water Balances Purpose: The reason for preparing preliminary water balances is to check on the estimates of the inflow and outflow components. The flow balances shall be designed to test different aspects. Flow balances for the whole study area and individual river catchments within the total area are equally valuable. Flow balances for the whole study period, for wet, dry and average years are also appropriate in certain situations. For aquifers which show a rapid seasonal response, a balance for a wet month and another for a dry month will help to understand whether aquifer properties change depending on water table elevations. It is unlikely that perfect balances will be achieved, however the inability to explain poor balances may indicate that there is insufficient reliable input data to justify proceeding with modelling.

Approach: The Consultant is expected to calculate preliminary water balances for the likely model area prior to commencement of the numerical modelling (Phase II). The Consultant shall advise on the appropriate time periods for water balances based on the data available. The water balances will indicate the general availability of water resources in the area and how conditions have changed during the period 1970-2010. Bidders shall state in their proposals the assumptions that are likely to be made in the calculation of this preliminary water balance. The Environment Agency attaches great importance to this step in the modelling procedure since it is the first indication of the viability of the conceptual model.

Outputs: The Consultant shall produce either a single water balance or a series of water balances for different parts of the catchment. A number of water balances shall be prepared covering different time periods. If water balances are calculated for sub-areas, then the aggregation of the parts shall cover the whole of the study area. Both total water balances and groundwater balances shall be presented. It is unlikely that the numerical sum of the components will be zero, but the significance and reasons for any out of balance should be discussed.

Task 9: Development of a Surface Water / Groundwater Conceptual Model Purpose: Groundwater modelling is a cyclical process. From the field data it is necessary to formulate a simplified yet quantitative understanding of how the real flow system operates. This conceptual model forms the foundation upon which the numerical model will be built, therefore, the ideas it embodies need to be comprehensively tested prior to and during any numerical modelling. Prior to the commencement of the modelling, the Environment Agency will require the Consultant to formulate his ideas concerning the dominant aquifer flow mechanisms and the degree of surface water-groundwater interaction into a conceptual model. Approach: Where relevant, to illustrate the system’s behaviour, the Consultant shall produce relevant hydrogeological cross-sections (between 6 and 10 is typical), water balances at appropriate time scales, relevant river and water level hydrographs and plans showing the hydraulic gradients and the major changes in hydrogeology. Once the conceptual model has been agreed a generalised three-dimensional colour picture of the area shall be produced, annotated to highlight key features.

Outputs:

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The Environment Agency will require the Consultant to present his ideas concerning the dominant aquifer flow mechanisms and the degree of surface water-groundwater interaction for discussion. The Consultant will: 1. define the extent of the study area and subdivide this into appropriate zones (vertically and horizontally) based on the hydrogeology 2. describe the hydrogeological conditions and flows at the boundaries of the study area 3. identify all inflows and outflows, estimate their size and illustrate their temporal variation 4. estimate the plausible range of all aquifer parameters in each hydrogeologically distinct zone 5. identify the limitations of the current conceptual understanding and the major sources of uncertainty

This conceptual model shall include a description of the mechanisms operating in the area, the nature of the inflows and outflows, the number and types of boundaries, and shall include a variety of different diagrams of the area, annotated to highlight key features (geological, hydrogeological and hydraulic) and to indicate average or typical flow quantities and aquifer parameter values.

The Consultant shall make the Environment Agency aware of any deficiency in data that could compromise the outcome, and provide timely advice about its rectification.

Task 10: Proposed Development and Refinement of Numerical Model Purpose: Once a conceptual model has been agreed, the flow mechanisms identified can be represented numerically and the output compared with observed data and other information. The aim of this task is to recommend how to construct a numerical model based on the conceptual model understanding gained in the previous tasks, which is refined until it can adequately simulate the field behaviour.

Approach: The Consultant shall consider how the model will be set up based on the conceptual model and what features need to be successfully represented in order to give confidence that the model is adequate to answer the questions for which it has been developed. Acceptance criteria should be proposed and agreed with the Environment Agency prior to building the numerical model. The Consultant shall explain the method and rationale used to assign parameter values and inflows and outflows. The Consultant shall clearly describe and justify the extent of the model and the location of the model boundaries, how space and time will be discretised, and the model layering. The layering shall be justified on the basis of the conceptual model by considering the flow system and the relationship between hydrogeological units. The hydrogeological conditions at the boundaries of the model shall be defined and their representation in the numerical model discussed. A figure shall be presented superimposing the model grid on the study area and shall highlight significant features, such as water bodies, geological features and physical boundaries. The dimensions of the grid blocks or elements and the number of nodes in the grid shall be clearly stated.

Outputs: The Consultant shall recommend and justify the following: 1. the extent, layers, orientation and nodal spacing of the model grid 2. the period of simulation and discretisation of time 3. the representation of boundary conditions and initial conditions 4. the aquifer types, geometry and properties 5. the spatial and temporal variation in recharge 6. the representation of abstraction 7. the representation of flow between model layers

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8. the surface water-groundwater interactions 9. the choice of code The model layering shall be justified on the basis of the conceptual model by considering the flow system and the relationship between hydrogeological units.

On completion of this Task the Consultant shall discuss with the Environment Agency his proposals for constructing and testing all the above aspects of the historical model. The Consultant must obtain the agreement of the Environment Agency Project Manager on the proposed method for developing and refining the model prior to commencement of Phase II. It is at the Environment Agency’s discretion whether to proceed beyond Phase I.

PHASE II: DEVELOPMENT OF NUMERICAL MODEL

Task 11: Construction of Model Purpose: The Consultant shall transpose the conceptual understanding into a time variant numerical model which fully represents the agreed flow behaviour of the aquifer system. This includes recharge and groundwater flow modelling. It is anticipated the model would be constructed on a 200 m grid and contain 3 stress periods per month, from 1970-2010. The model will require a minimum of 2 layers representing the Great and Inferior Oolite. The conceptual study may indicate more layers are required, for example for the Fullers Earth aquitard and the Cornbrash and Kellaway Beds minor aquifers in order to simulate aquifer flows and baseflow contributions to the rivers. If prior to the beginning of this task the Environment Agency’s South West Region decides to contribute to the model and extend it to the south west, then additional layering may be required depending on our needs. These would form a change of scope. Intended software for pre- and post- processing of model inputs and outputs should be stated in all bids and how they are to be used described. The Environment Agency currently has relevant licences for ArcGIS, Surfer, MODFLOW, Groundwater Vistas, and Microsoft Office products. Other software intended for use should be described.

Approach: The assumptions or modifications required in simplifying the conceptual understanding into the numerical model shall be fully documented. All Bidders shall include in their proposals a brief discussion of the likely model boundary conditions for the study area, treatment of faults, flows between aquifers etc.

Outputs: A groundwater model representing all the features documented in the conceptual model.

Task 12: Groundwater Flow Model Refinement Purpose: The model will be refined over the data period in the conceptual model, 1970 to 2010, against the historical behaviour of the surface water and groundwater system until the agreed acceptance criteria defined have been met or the Environment Agency has agreed that further refinement runs are unnecessary.

Approach: The Environment Agency requires an initial testing of the sensitivity of the model results (outputs) to agreed changes in key mechanisms or parameters. A logical series of modifications to the model will then be agreed and carried out. The Environment Agency will not accept arbitrary modifications to model mechanisms or

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BID REF: 26044 SCOPE parameters which cannot be justified by logical, physical explanations based on analysis of the observed data and other available information. The Consultant shall maintain an audit of all refinement runs and shall keep the Environment Agency informed of any problems or successes. The audit shall also include details of any changes to the conceptual model needed to effect a better match with the observed historical behaviour. Appropriate numerical convergence criteria in terms of both head and flow will be agreed in consultation with the Environment Agency. Typical values from previous modelling projects are given as guidance: a maximum head difference of around 10-4 m at any node and a flow imbalance of no more than 0.1 % of the recharge at any node.

Outputs: Comprehensive comparisons between field and modelled results will be made. These will include:

Groundwater Heads • maps and cross-sections of groundwater heads • hydrographs of groundwater heads • horizontal and vertical head gradients

Groundwater-Surface Water Interaction • spring and river flow hydrographs • river flow accretion diagrams • plots showing gaining and losing reaches of streams

Water Balances (both total and groundwater alone) • long-term average water balances for all components of the water budget • time series of components of the water budget for the whole catchment and appropriate sub- catchments.

Any other comparisons considered appropriate for testing whether the numerical model is able to represent the flow behaviour of the real system sufficient for the purpose of the study and the modelling objectives defined in the conceptual study. To this end a naturalised model run shall be conducted to test that the numerical modelling solution to the conceptual understanding is defensible. Similarly, a fully licensed run shall be run to test the model’s stability under stress. The Consultant shall undertake this task by using a fully-licensed version of the model as generated in task 14 (NGMS) if preferred.

Task 13: Model Sensitivity Analysis Purpose: The Consultant will undertake a rigorous sensitivity analysis of the behaviour of the model to determine the influence of uncertainty. Approach: The Consultant and the Environment Agency will have identified the major sources of uncertainty from the conceptual study and documented them in the conceptual model report. Uncertainty resulting from the following sources shall be considered: 1. the field data 2. the adequacy of the conceptual model and possible alternative formulations 3. the mathematical and numerical representation of the flow mechanisms 4. the input parameters applied to the numerical model

The sources of uncertainty appropriate for investigation during sensitivity analysis will be agreed.

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During the model refinement, the significance of the important model parameters in achieving an adequate match between field and modelled results will become apparent. In the sensitivity analysis, modifications to a single model parameter shall be made (for complex models the changes may be made over a restricted area) and the effect on the simulation shall be noted. Changes in horizontal hydraulic conductivity and specific yield should be of the order of 50% to 100%; for vertical hydraulic conductivity and confined storage coefficients, changes of one half to one order of magnitude should be made. The sensitivity to river coefficients shall also be explored. As a further demonstration of Bidders’ modelling capabilities, proposals must indicate the parameters likely to require investigation in this way.

Outputs: In the sensitivity analysis, many results will be obtained; skill is required in selecting comparisons between field and modelled results which demonstrate where greatest changes occur. Diagrams shall be presented which clearly illustrate the influence which the sources of uncertainty have on the modelled results.

Task 14: Model configuration to NGMS Purpose: The numerical model will then be configured for upload to the Environment Agency’s National Groundwater Modelling System.

Approach: The Deltares Wiki guide to NGMS configuration shall be followed which generally comprises the following tasks: Task a: Create datasets: (to enable setup of three default scenarios, including naturalised, historic, and fully licensed). Task b: Prepare locations Task c: Create NGMS configuration Task d: Check NGMS configuration Task e: Acceptance testing

Outputs: The NGMS configuration will be delivered on DVD to the Environment Agency. This task should be completed in parallel to model development where possible, such as configuring locations, and checked by the Consultant and passed to the Environment Agency to check as the model is developed.

Task 15: Formulation of Conceptual and Numerical Modelling Report Purpose: The report is intended primarily for internal use by the Environment Agency. The earlier sections will provide a record for the Agency of data and information relevant to the study area. The report shall be in a suitable format for updating. In addition the report will provide detailed information about the conceptual model and the associated parameter values. The uncertainties shall be stated and possible methods of resolving them during subsequent phases of the work should be explained.

Approach: The report with Appendices shall provide a comprehensive record of the methodologies adopted and the findings of the study. It shall be sufficiently complete for another consultant to carry out any future work..

Outputs: Three copies of a draft report (one each for the area, region, and external modelling advisor) and two CD copies shall be provided. The report will include the following items:

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1) Presentation in graphical and tabular form (where appropriate) the raw data as collated in Task 2 e.g. digitised topographic, geological and piezometric maps, river-flow and groundwater hydrographs, tabulation of groundwater and surface water licence information; tabulation of pump test information; 2) Summary (in the form of an Appendix) of the key reference papers identified in Task 3, including a full reference of all relevant literature; 3) Interpretation and presentation (again preferably in graphical form) of data and information collated; 4) Presentation of the effective rainfall and water balance estimates; 5) A description of the model setup and how it fits with the conceptual understanding; 6) Presentation of details of the groundwater model refinement and sensitivity analysis including comparison of modelled and observed river and groundwater hydrographs, river-aquifer interactions and groundwater hydraulic gradients and flow directions; 7) Any revised understanding of the hydrogeology, recharge, surface water-groundwater interactions; 8) Model piezometric maps and groundwater cross-sections, and details of how the model has simulated other key elements of the conceptual understanding; and 9) Deductions as to the impact of historical groundwater abstractions on surface water flows and regional groundwater levels (the findings of the naturalised run).

This draft report will be presented and discussed at a progress meeting between the Project Manager and Senior Modeller of the Consultant and the Project Review Panel. Prior to the meeting, the Consultant shall allow up to six weeks for consideration by the Environment Agency of the draft report and any modifications required for the final stage report. Any presentation materials used during the meeting shall later be made available to the Agency. Two hard copies of the final version of the report (including colour maps and cross-sections where appropriate) will be issued within one month of this meeting. The report shall be produced to a high quality. It shall be comb bound and photocopied, unless otherwise agreed with the Environment Agency. Colour photocopies shall be provided of relevant graphical outputs etc. The report shall also be provided on computer CD (or DVD as appropriate) in a form compatible with Environment Agency word processing systems i.e. Microsoft Word and Excel 2007. A pdf version shall be supplied, which shall comprise the entire report (to include all text, diagrams and maps).

Task 16: Compilation of a User Manual Purpose: The Environment Agency shall be able to use the User Manual to input the model data, repeat any simulation and process the results in the same way as the Consultant as well as providing the Agency’s modelling staff with sufficient guidance to be able to extend the model by adding future data of the same type (e.g. future years’ abstractions and recharge distributions).

Approach: The Consultant is expected to develop a User Manual (in addition to the standard guide that accompanies the software) which Environment Agency staff can use to become acquainted with the key commands and error codes of the software and the model layout. The form of any ASCII data files shall also be described, so that as the Environment Agency becomes proficient in the use of the model we are able to make data entries and modifications directly through a text editor.

Outputs: The User Manual should be accompanied by copies of the model data files and the source code along with any executable programs which have been used to develop or run the model. The Consultant will also supply any spreadsheets and databases developed during the Study. These files will be delivered on an appropriate medium.

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BID REF: 26044 CONTRACT DATA CONTRACT DATA

Part one - Data provided by the Employer

1. General • The conditions of contract are the core clauses and the clauses for main Option C, dispute resolution Option W1 and secondary Options X2, X9, X11, X18, Y(UK)3 and Z of the NEC3 Professional Services Contract June 2005 (with amendments June 2006).

• The Employer is

Name: Environment Agency

Address: South East Region Kings Meadow House Kings Meadow Road Reading Berkshire RG1 8DQ

Tel: 0118 9535750 Fax: 0118 9535819

• The Adjudicator is the person appointed as follows:

In the event that a dispute is referred to adjudication, either:

the referring Party at the same time applies to the Institution of Civil Engineers to appoint an Adjudicator who agrees to enter into an NEC Adjudicators Contract (without amendment) and to conduct the adjudication according to the contract between the Parties. The application to the Institution includes a copy of this definition of the Adjudicator. The referring Party pays the administrative charge made by the Institution.

If the Parties agree the Adjudicator is a person listed on a list of accepted adjudicators prepared by the Employer or a person proposed by the Consultant.

• The services are:

Cotswolds Groundwater Model Development as described in the Scope.

• The Scope is in:

the attached Scope for Cotswolds Groundwater Model Development – Bid Ref: 26044.

• The language of this contract is English.

• The law of the contract is the law of England, subject to the jurisdiction of the English Courts.

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• The period for reply is 2 weeks.

• The period for retention is 6 years following Completion or earlier termination.

• The Adjudicator nominating body is The Institution of Civil Engineers.

• The tribunal is litigation in the courts.

• The following matters will be included in the Risk Register:

As detailed in the Scope.

• The additional conditions of contract are:

Z1 Publicity Z1.1 The Parties do not disclose information about each other or those of others obtained in connection with the services except when necessary to carry out duties under the contract or law. The Environment Agency may be required to release information in order to comply with its statutory duties under the Freedom of Information Act 2000 and/or the Environment Information Regulations, any may also include some information under the Publication Scheme that it maintains under the Act.

Z1.2 The Consultant may publicise the services only with the Employer’s written agreement.

Z2 Environment Agency as regulatory authority Z2.1 The Environment Agency’s position as a regulatory authority and as Employer under the contract are separate and distinct. Actions taken in one capacity are deemed not to be taken in the other.

Z2.2 Where statutory consents must be obtained from the Environment Agency in its capacity as a regulatory authority, the Consultant is responsible for obtaining these and paying fees. The Employer’s acceptance of a bid and the Employer’s or Employers Agent’s instruction or variation of the services does not constitute statutory approval or consent.

Z3 Subconsulting Where staff rates for sub-consultants are agreed between the Environment Agency and the Consultant as set out in Schedule 4 the provisions of Clause 24.3 do not apply.

For other sub-consultants the text of Clause 24.3 is deleted and replaced by

“The Consultant appoints a sub-consultant under the NEC3 Professional Services Contract 3rd Edition unless the Employer agrees otherwise.

The Consultant does not appoint a sub-consultant until the Employer accepts the appointment. A reason for not accepting a Sub- consultant is that the Employer considers the appointment will not provide best value for money.”

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BID REF: 26044 CONTRACT DATA

Z4 Option X9: Transfer of rights Insert additional clause X9.2 as follows : No use may be made by the Consultant of any material prepared for this contract by him for the purposes other than those stated in the Scope without the Employer's prior agreement.

Z5 Price for Services Provided to Date The text of clause 11.2 (16) is deleted and replaced by: “The Price for Services Provided to Date is the Time Charge for the work which has been completed, not exceeding the forecast provided under clause 21.4 and accepted by the Employer.”

Z6 Forecasts of Time Charges and expenses Z6.1 The text of clause 21.4 is deleted and replaced by: “The Consultant prepares forecasts of the total Time Charge and expenses for the whole of the services and submits them to the Employer for acceptance. Forecasts are prepared at the intervals stated in the Contract Data from the starting date until Completion of the whole of the services. An explanation of the changes made since the previous forecast is submitted with each forecast. Acceptance of a forecast, other than a change arising from an accepted compensation event, may be withheld for any reason. The Consultant does not exceed the Time Charge and expenses of the latest accepted forecast. If the Consultant is unable to complete the services within the unexpended balance of an accepted forecast, the extent of the services is reduced by the Employer to take into account reasonable levels of performance by the Consultant and ensuring good value for the money expended.”

2. The Parties’ main responsibilities • The Employer provides access to the following persons, places and things

access to access date As described in the Scope

3. Time • The starting date is the date of award of contract.

• The Consultant submits revised programmes at intervals no longer than 4 weeks.

4. Quality • The quality policy statement and quality plan are provided within 2 weeks of the Contract Date.

• The defects date is 52 weeks after Completion of the whole of the services.

5. Payment • The assessment interval is one month.

• The currency of this contract is pounds sterling (£).

• The interest rate is 2 % per annum (not less than 2) above the Bank of England base rate.

• The period within which payments are made is 30 days.

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• The expenses stated by the Employer are Item Amount

Telephone and fax charges Nil (deemed to be included in staff rates as an overhead) Normal postage nil (deemed to be included in staff rates as an overhead)

Postage by courier (by prior At cost (no mark up) approval by the Employer)

Working photocopying/printing nil (deemed to be included in staff (working is defined as copying or rates as an overhead) printing required which is not formally requested/issued for comment and does not fall under the Consultant’s Quality Assurance Procedures) Car mileage 46 pence per mile reducing to 25 pence per mile for mileage in excess of 4000 miles per annum for each individual member of staff Car hire (by prior approval) at cost (no mark up)

Public Transport/fares (by prior at cost, standard class only (no approval) mark up)

All disbursements (including sub- at reasonable cost contracted services)

Overnight accommodation at reasonable cost with prior approval of the Employer limited to a hotel accommodation rating of 3 stars or equivalent. (Note: the Employer may provide the Consultant with overnight accommodation using the Employer’s supplier of overnight accommodation) Equipment hire (extra ordinary at cost (no mark up) equipment required by the Consultant to complete the services requested, which would not normally be held by the Consultant) • The Consultant prepares forecasts of the total Time Charge and expenses no longer than 4 weeks.

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• The Consultant’s share percentages and the share ranges are

share range Consultant’s share percentage

less than 90% 30% from 90% to 110% 50% from 110% to 120% 70% greater than 120% 100%

6. Compensation events • There is no Contract Data required under this heading.

7. Title and confidentiality • There is no Contract Data required under this heading.

8. Indemnity, insurance • The amounts of insurance and the periods for which the Consultant and liability maintains insurance are

event cover period following Completion of the whole of the services or earlier termination

failure of the Consultant £5,000,000 12 years to use the skill and care in respect of each normally used by claim, without professionals providing limit to the services similar to the number of claims. services.

death of or bodily injury £5,000,000 12 months to a person (not an in respect of each employee of the claim, without Consultant) or loss of or limit to the damage to property number of claims. resulting from an action or failure to take action by the Consultant.

death of or bodily injury whichever is the for the period to employees of the greater of required by law Consultant arising out of £10,000,000 or and in the course of their the amount employment in required by law. connection with this contract.

• The Employer provides the following insurances: None.

• The Consultant’s total liability to the Employer for all matters arising under or in connection with this contract, other than the excluded matters, is limited to an aggregate of £10 million per individual contract.

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BID REF: 26044 CONTRACT DATA CONTRACT DATA

Part two - Data provided by the Consultant

• The Consultant is

Name: *______Address: *______*______*______*______

Tel: *______Fax: *______Email: *______

• The key persons are

shown in the attached Activity Schedule – Bid Ref: 26044.

• The staff rates are

shown in the attached Activity Schedule – Bid Ref: 26044, and in accordance with the over arching framework agreement for Groundwater Resource Modelling, Geological Investigations & Hydrogeology / Hydrology Services, contract ref 22344.

• The following matters will be included in the Risk Register

as detailed in the Consultant’s bid response – Bid Ref: 26044.

• The completion date for the whole of the services is

shown in the attached Activity Schedule – Bid Ref: 26044.

• The programme identified in the Contract Data is

as detailed in the Consultant’s bid response – Bid Ref: 26044.

• The expenses stated by the Consultant are

shown in the Contract Data – Part One and in the attached Activity Schedule – Bid Ref: 26044.

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BID REF: 26044 CONTRACT DATA

• The activity schedule is

shown in the attached Activity Schedule – Bid Ref: 26044.

• The tendered total of the Prices is

shown in the attached Activity Schedule – Bid Ref: 26044.

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BID REF: 26044 CONTRACT DATA

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BID REF: 26044 ACTIVITY SCHEDULE

ACTIVITY SCHEDULE

1 THE PRICES & COMPLETION DATE – NEC PSC OPTION C (TARGET PRICE)

The lump sum prices to be paid and the completion date for the whole of the services provided in accordance with the contract are shown in Table 1 below:

Table 1: The Prices – NEC3 PSC Option C

Item Activity Completion Date The Prices £s No (weeks from date of contract) (ex VAT)

1 Study inaugural meeting. * ______weeks * ______

2 Data collation. * ______weeks * ______

3 Literature review. * ______weeks * ______

4 Geological interpretation of lithological logs. * ______weeks * ______

5 Groundwater level analysis. * ______weeks * ______

6 Calculation of effective rainfall. * ______weeks * ______

7 River flow analysis. * ______weeks * ______

8 Calculation of preliminary water balances. * ______weeks * ______

9 Development of surface water / groundwater conceptual model. * ______weeks * ______

10 Proposed development and refinement of numerical model. * ______weeks * ______

11 Construction of numerical model. * ______weeks * ______

12 Groundwater flow model refinement. * ______weeks * ______

13 Model sensitivity analysis. * ______weeks * ______

14 Model configuration to NGMS. * ______weeks * ______

15 Formulation of conceptual and numerical modelling report. * ______weeks * ______

16 Compilation of user manual. * ______weeks * ______

17 Project management. * ______weeks * ______

Tendered total of the Prices £s * ______

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BID REF: 26044 ACTIVITY SCHEDULE 2 KEY PERSONS & STAFF RATES

The key persons, their jobs, responsibilities and the fixed staff rates are shown in Table 2 below:

Table 2: Key Persons & Staff Rates

Key Persons (Name) Job Responsibilities Hourly Rate £s (ex VAT)

* ______* ______* ______* ______

The qualifications and experience of key persons are detailed in their CVs.

3 EXPENSES

The fixed expenses stated by the Employer and the Consultant are shown in Table 3 below:

Table 3: Expenses

Item Amount £s (ex VAT)

Travel by Car – All staff 0.46 per mile Travel by Rail & Public Transport – All staff – (standard class fare) at cost Overnight accommodation – All staff – (to be agreed in advance with the Employer) at cost Photocopying, printing, consumables, deliverables/reports, telephone, fax and postage charges. Nil (deemed to be included in the staff rates) Subcontracted services at cost

Other specific expenses (Consultant to state any applicable) * ______* ______* ______* ______

Bidder’s Name: * ______Date: * ______

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BID REF: 26044 ACTIVITY SCHEDULE

4 INITIAL FORECAST OF THE TOTAL TIME CHARGE & EXPENSES

The Prices detailed in Table 1 are broken down as shown in Table 4 below:

Table 4: Initial forecast of the total Time Charge and expenses

Item No 1 2 3 4 Key Persons Hourly Rate Hours Price £s Hours Price £s Hours Price £s Hours Price £s (Name) £s

* ______* ______* ____ * ______* ____ * ______* ____ * ______* ____ * ______

Total Time Charge £s * ______* ______* ______* ______

Travel * ______* ______* ______* ______Overnight accommodation * ______* ______* ______* ______Subcontracted services * ______* ______* ______* ______Other expenses * ______* ______* ______* ______

Total Expenses £s * ______* ______* ______* ______

Item Price £s (as per Table 1) * ______* ______* ______* ______

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Item No 5 6 7 8 Key Persons Hourly Rate Hours Price £s Hours Price £s Hours Price £s Hours Price £s (Name) £s

* ______* ______* ____ * ______* ____ * ______* ____ * ______* ____ * ______

Total Time Charge £s * ______* ______* ______* ______

Travel * ______* ______* ______* ______Overnight accommodation * ______* ______* ______* ______Subcontracted services * ______* ______* ______* ______Other expenses * ______* ______* ______* ______

Total Expenses £s * ______* ______* ______* ______

Item Price £s (as per Table 1) * ______* ______* ______* ______

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Item No 9 10 11 12 Key Persons Hourly Rate Hours Price £s Hours Price £s Hours Price £s Hours Price £s (Name) £s

* ______* ______* ____ * ______* ____ * ______* ____ * ______* ____ * ______

Total Time Charge £s * ______* ______* ______* ______

Travel * ______* ______* ______* ______Overnight accommodation * ______* ______* ______* ______Subcontracted services * ______* ______* ______* ______Other expenses * ______* ______* ______* ______

Total Expenses £s * ______* ______* ______* ______

Item Price £s (as per Table 1) * ______* ______* ______* ______

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BID REF: 26044 ACTIVITY SCHEDULE

Item No 13 14 15 16 Key Persons Hourly Rate Hours Price £s Hours Price £s Hours Price £s Hours Price £s (Name) £s

* ______* ______* ____ * ______* ____ * ______* ____ * ______* ____ * ______

Total Time Charge £s * ______* ______* ______* ______

Travel * ______* ______* ______* ______Overnight accommodation * ______* ______* ______* ______Subcontracted services * ______* ______* ______* ______Other expenses * ______* ______* ______* ______

Total Expenses £s * ______* ______* ______* ______

Item Price £s (as per Table 1) * ______* ______* ______* ______

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Item No 17 Key Persons Hourly Rate Hours Price £s (Name) £s

* ______* ______* ____ * ______

Total Time Charge £s * ______

Travel * ______Overnight accommodation * ______Subcontracted services * ______Other expenses * ______

Total Expenses £s * ______

Item Price £s (as per Table 1) * ______

Bidder’s Name: * ______Date: * ______

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BID REF: 26044 ACTIVITY SCHEDULE

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