o XXXX indicates where information has been redacted under exemptions / exceptions in the Freedom of Information Act 2000 and / or Environmental Information Regulations 2004.

SERVICE ORDER

This Service Order specifies the requirements necessary for the completion of an agreement for undertaking Services to provide - Dozmary Pool SSSI Nutrient Budget Study

CONTRACT REFERENCE NUMBER: 24693

DATE: 27 July 2012 PURCHASE ORDER NUMBER: to Tbc follow FROM: Natural England TO: xxxxxxxxxxxxxxx Foundry House, 3 Millsands, Riverside APEM Limited Exchange, Sheffield S3 8NH Aquatic Ecology Laboratories Project Officer: xxxxxxxxxxxxxxxx FBA East Stoke Job Title: Land Management and East Stoke Conservation Adviser, 3 Moors Team Wareham ( Moor and the ) Dorset BH20 6BB

Telephone No: Tel. xxxxxxxxxxxxxx xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx E-mail Address xxxxxxxxxxxxxxxxxxxxxxxxxxxxx xxxxxxxxxxxxxxxxxxxx

SERVICES TO BE PROVIDED AT: INVOICE ADDRESS: Electronic outputs to xxxxxxxxxxxxxxxx Natural England, DFSSD Accounts at the above e-mail address. Payable, PO Box 92, Lion House, Any hard copy outputs to: Willowburn Trading Estate, Alnwick, Natural England, Pydar House, Pydar Northumberland, NE66 9AR Street, Truro TR1 1XU

SERVICES: To provide Dozmary Pool SSSI Nutrient Budget Study CONTRACT PERIOD: Commencement 23 July 2012 Date: Duration: For completion by 28 February 2013 CONTRACT PRICE EXCLUDING VAT: CONTRACT PRICE INCLUDING VAT: £18,051 £21,661.20 DESRIPTION OF SERVICES and TIMETABLE (specification): The work should be supplied in accordance with:  The Specification – see Annex A attached  APEM Limited tender proposal dated 21 July 2012  Optional bathymetry survey as agreed by e-mail: xxxxxxxxxxxxxx to xxxxxxxxxxxxxxxx dated 21 June 2012  Revised approach as set out in the e-mail xxxxxxxxxxxxxx to xxxxxxxxxxxxxxx 1

dated 27 July 2012

Timetable – contract to commence with the start up meeting on 23 July. Completion by 28 February 2013. PAYMENT PROFILE, RATES AND CHARGES: The total fee is £18,051 excluding Vat.

See breakdown of costs below.

Table 2. Bathymetric survey excluding travel fee (incorporated with other field survey)

TOTAL xxxxxx

Payment will be made monthly based on the value of the work completed in each 2 month, subject to the approval of NE’s Project Officer.

NATURAL ENGLAND RESPONSIBILITIES: As set out in the Specification -see Annex A.

MANAGEMENT INFORMATION: If requested under clause 15 of the General Terms following action note 06/10 5March 2010 issued by OGC, the Supplier may need to supply management information to Natural England or the OGC. The final scope of these requirements may vary according to the category of spend and will be agreed with the supplier at the time of engagement but may consider the following: line item amount; invoice line descriptions; invoice line number; currency code; order date; VAT inclusion flag; VAT rate; list price; number of items; unit of purchase; unit of purchase quantity; price per unit; supplier product/service code; product description; product/service level (product or service name); UNSPSC code; taxonomy code; taxonomy name; geographical; project code; project description; project start date; project delivery date (estimate and actual); total project cost and project stage. SPECIAL TERMS: Natural England General Terms and Conditions (see copy at Annex B) shall apply to this Service Order.

SIGNATURE: Signed on behalf of Natural England: Signed on behalf of the Contractor: Authorised Signatory: Authorised Signatory:

……………………………………………… ……………………………………………… Print name: xxxxxxxxxxxxx Print name:

Job title: Lead Adviser, Procurement Job title: Team

Date: 27 July 2012 Date:

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Annex A

Tender Specification

Project Reference: 24693

Title: Dozmary Pool SSSI Nutrient Budget Study Specification

About Natural England Natural England is the government’s advisor on the natural environment. We provide practical advice, grounded in science, on how best to safeguard England’s natural wealth for the benefit of everyone.

Our remit is to ensure sustainable stewardship of the land and sea so that people and nature can thrive. It is our responsibility to see that England’s rich natural environment can adapt and survive intact for future generations to enjoy. We work with farmers and land managers; business and industry; planners and developers; national, regional and local government; interest groups and local communities to help them improve their local environment.

1. Introduction

Dozmary Pool SSSI is an ancient natural moorland lake, unique on in having shown very little natural succession to bog and marsh. It is the largest natural freshwater lake in and is at an altitude which makes it without parallel in the south-west. The underlying granite yields a nutrient-poor soil which supports a mosaic of acid grassland and heathland in the surrounding areas. The lake is oligotrophic supporting a characteristically limited flora including nationally scarce species of higher plants.

Phosphate levels in the lake are currently well above levels expected for upland oligotrophic lake (total phosphorus (TP) annual average should be 10 µg/l or less). We require a contractor to develop a nutrient budget (both P and N) for the lake by carrying out repeat water quality sampling where necessary to compliment routine data collected by the Environment Agency, hydrological analysis to understand the water budget and quantification of the main sources of nutrient inputs (primarily cattle, geese, fertiliser and septic tanks) through a combination of direct measurements where required and export co- efficient modelling. Cattle graze the adjoining heathland and spend time in the lake itself, while flocks of geese have been reported at intervals feeding on the shore.

Remedial action will be required in the long-term to reduce phosphorus levels; this will require proportionate action on the range of different nutrient sources. Establishing a nutrient budget for the lake and catchment is a key step in determining where action is best targeted to reduce nutrient enrichment of the lake, and the benefits this might offer for water quality. In addition, this study should draw on the results of the nutrient budget to recommend any management actions required both on site or within the catchment to reduce nutrient levels. If further investigation is considered necessary before management action can be targeted, the further work required should be identified.

2. Objectives:

The objectives of the project are to:

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1. Establish a phosphorus/nitrate budget/source apportionment for the lake and catchment.

2. Produce an outline lake management plan incorporating the results of 1 and providing an evaluation of where reductions in phosphorus load will be required to meet the relevant phosphate target. Potential management actions should be prioritised in terms of their effectiveness in reducing phosphate inputs to the lake in the long-term. Detailed advice is required on the extent to which actions need to be implemented to bring down phosphate levels to the required levels over (eg excluding cattle from the lake year round or reducing numbers by 50% etc). If further investigation is required before management conclusions can be drawn in some areas, this should be specified and estimated costs for any extra work provided. Lake SSSIs do not currently have targets for nitrogen, but a recommendation for nitrogen load should be suggested based on keeping algal growth in check and in-keeping with this oligotrophic lake type.

3. Addressing Objective 1: Work Programme

The main steps are as follows:

1. determine the current annual mean total phosphorus and nitrogen concentration for the lake using available information; 2. estimate the current phosphorus and nitrogen load to the lake from all sources (consented and unconsented point sources, diffuse sources, internal loading) 3. establish the critical phosphorus load that would result in the lake complying with the relevant phosphorus standard; lake SSSIs do not currently have targets for nitrogen, but a recommendation for nitrogen load should be suggested based on keeping algal growth in check and in-keeping with this oligotrophic lake type. 4. apportion the critical load between sources; and 5. recommend actions to reduce individual and overall loads to levels consistent with achieving the standard concentration.

In many cases there will be inadequate data to inform all elements of the work (e.g. EA, MET office, published export coefficients). Therefore estimates will need to be made on the basis of both measured and modelled data.

Detailed methodology

Establishing the nutrient budget will require a collation of existing nutrient data & bathymetry data from the lake, data on catchment size, character, rainfall and land use and information on the hydrology of the lake (there are no inflowing streams). Other nutrient sources may need to be estimated ‘by difference’ or simple modelling. Where such estimates are used some indication of the confidence in results should be given.

1. Current TP concentration

Compliance with the appropriate standard should be determined on the basis of a face value test using annual mean data (3+ years where available). The Favourable Condition Table for Dozmary Pool SSSI is currently being updated but the relevant section for water quality will follow the CSM standard guidelines closely (ie. The target is likely to be: Stable nutrient levels appropriate to lake type. Mean annual total phosphorus concentration less than target for appropriate lake type. For a low alkalinity shallow lake such as Dozmary pool the total phosphorus (TP) annual average is likely to be 10 µg/l or less) The available P monitoring data for Dozmary Pool is detailed in Appendix A.

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2. Current TP Load There are no streams flowing into the lake. The current annual nutrient loads to the site should be estimated using data on annual loads from nutrient sources in the catchment combined with available water quality data. If more field based data collection could strengthen this assessment then recommendations should be made and costed in the report (if they fall outside the budget of this study).

Export coefficient method. Data should be acquired on the following sources:

 Agricultural - Land use and livestock numbers should be acquired from Agricultural Census data, and appropriate export coefficients used to generate an estimated agricultural load.

 Unsewered population There are thought to be only two properties in the catchment. This needs to be confirmed, usage of the properties confirmed with the owners (one is thought to be a holiday cottage), and the load estimated based on the information provided. Suitable export coefficients should be applied to generate estimated load.

 Internal loading - an estimate of internal loading should be made by reference to the literature, but taking into account any findings ascertained through a site visit.

 Other sources – Other sources (eg geese grazing on the shore) should be quantified, by observation and discussions with local residents.

A field visit to the site and its catchment would be required to estimate the impact of these various potential sources and to indentify other possible sources not mentioned here. A simple hydrological assessment will also be required following a site visit, as connectivity to the catchment and hence influence of surrounding land use is currently not well understood (the lake has no inflow streams).

3. Critical Load Determination

The critical load (the load that equates to the relevant standard in-lake TP concentration) should be determined using the OECD lake phosphorus model (OECD, 1982). This will require data on the volume and residence time of the lake. There is one small stream exiting the lake at the southwestern end.

4. Assigning portions of the critical load to different sources

The critical load should be apportioned in an equitable way between the different sources taking account of phosphorus control and reduction techniques, the temporal distribution of loads (i.e. seasonal contributions) and the likely bioavailability of phosphorus from different sources.

5. Recommendations

Recommendations should be made for action on each type of source to comply with the critical load (e.g. first time rural sewerage, changes to agricultural practices). Consideration should also be given to the extent to which the internal load may need to be acted upon.

Recommendations should also be made for any other action likely to be required to reduce the biological impact of enrichment, such as managing fish biomass. 6

Any limitations of the work in relation to determining necessary management action should be highlighted, and any further analytical work deemed to be needed should be listed. This may include specific modelling of agricultural management regimes in relation to phosphorus loads.

4. Addressing objective 2: Outputs

The outline lake management plan should be spatially explicit to assist engagement of catchment stakeholders including farmers, commoners and landowners. Management recommendations on addressing sources of sediment should also be included. Where further evidence is required to justify management, this should be detailed along with estimated costs.

All outputs should be submitted to the Project Manager in MS Word or .pdf formats by e-mail or CD ROM and in hardcopy.

5. Timescales and outputs:

Work task/Output Completion date (months elapsed) 1. Start up meeting with the Natural England (SSSI 1 responsible officer, Richard Glasson, and project manager, Clare FitzGibbon, anticipated July 2012) 2. Investigation and analysis 5 3. Preparation of draft report and submission to Natural 6 England. No later than 31st January 2012.

4. Preparation and submission of final report – No later 7 than 28th February 2012.

6. Project management

The Nominated Officer for the project is: xxxxxxxxxxxxx, 3 Moors Team Natural England, Pydar House, Pydar Street, Truro TR1 1XU

Mobile: xxxxxxxxxxxx Landline no: xxxxxxxxxx E-mail: xxxxxxxxxxxxxxxxxxxxxxxxxxx

7. Knowledge and skills required

Expertise is essential in the following fields:

i) Experience in nutrient source apportionment & lake management. Understanding of hydrology. It is expected that the successful bidder will employ specific, acknowledged, methodologies, specialists and equipment suitable for the job.

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ii) Extensive experience in taking of samples, analysis and interpretation of samples. Tenders should specify personnel who would be undertaking the work and their expertise.

8. Supporting Documentation Your quotation should include sufficient information to enable us to assess how well you will achieve the project aims in the required timeframe. Consultants are required to provide the following information with their price quotation:

 Evidence of experience of this work area.

 A project plan and timetable of work.

Appendix A: Phosphate data available

Dozmary Pool 45 0.12

40 0.1 35

30 0.08

25 0.06 C… T…

20 TP mg/lTP 15 0.04

10Chlorophyll ug/l 0.02 5

0 0 2004 2005 2006 2007 2008 2009 2010 2011

Figure A.1 Results of Environment Agency phosphate and chlorophyll monitoring at Dozmary Pool 2004-2011.

Table A.1 Data currently available from the Environment Agency since 2004.

Date Chll ug/l TP mg/l 13/08/2004 6.3 0.032 17/09/2004 8.2 0.045 13/10/2004 9.1 0.031 22/11/2004 12.3 0.024 08/12/2004 24 0.038 20/01/2005 140 0.053 22/02/2005 157 0.063 21/03/2005 30.5 0.032 8

20/04/2005 32.8 0.091 23/05/2005 5.2 0.038 20/06/2005 16 0.062 22/07/2005 17.2 0.055 07/09/2005 13.7 0.056 26/09/2005 18.7 0.018 21/10/2005 16 0.0397 09/11/2005 14.8 0.0371 01/12/2005 24 0.0507 23/01/2006 56.9 0.058 16/02/2006 53.6 0.077 27/03/2006 47.2 0.0694 16/05/2006 11.5 0.0521 15/06/2006 69.7 0.177 26/06/2006 6.6 0.0197 14/07/2006 3.9 0.0132 09/08/2006 23.9 0.0873 14/09/2006 13.8 0.0352 27/10/2006 14.4 0.0615 09/11/2006 8.8 0.003 23/11/2006 8.8 0.0152 12/01/2007 43.5 0.193 07/02/2007 48.5 14/03/2007 86.1 0.0408 03/04/2007 68.5 0.151 23/05/2007 26.6 0.0997 21/06/2007 59.1 0.188 13/07/2007 50.8 0.145 08/08/2007 3.3 0.0173 14/09/2007 8.8 0.0204 25/10/2007 4.1 0.0234 06/11/2007 6.2 0.0195 28/11/2007 59.6 0.183 07/01/2008 41.5 0.135 04/02/2008 25.5 0.1 17/03/2008 33.7 0.102 03/04/2008 18.2 0.108 16/05/2008 6.1 0.0498 17/06/2008 20.5 0.16 21/07/2008 25.5 0.123 18/08/2008 12.1 0.0594 15/09/2008 19.3 0.0522 06/10/2008 43.6 0.127 05/11/2008 14.5 0.0532 05/12/2008 33 0.0916 9

14/01/2009 29.9 0.0857 03/03/2009 46.2 0.0912 31/03/2009 19.6 0.0655 24/04/2009 8.7 0.0729 15/06/2009 28.5 0.121 07/07/2009 34.9 0.158 10/08/2009 8.5 0.0584 09/09/2009 9.7 0.0614 13/10/2009 8.9 0.0575 29/10/2009 12.6 0.0593 16/11/2009 52.2 0.218 11/12/2009 13.1 0.0459 02/02/2010 12.4 0.126 17/03/2010 6.5 0.0366 25/03/2010 14.6 0.052 20/08/2010 13.3 0.0328 27/08/2010 3.6 0.024 23/09/2010 14.1 0.0507 21/10/2010 5 0.0264 12/11/2010 20.3 0.06 25/11/2010 7.5 0.0274 17/01/2011 7.6 0.0282 11/02/2011 13.9 0.0371 23/02/2011 4.7 0.0193 08/04/2011 3.9 0.024 26/05/2011 20.9 0.23 06/07/2011 11.5 0.0544 21/07/2011 2.9 0.0287

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