| 526 | An audit of performance in the analysis of biological samples in 1998. Environment Agency : AQC audit |
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| 527 | An audit of performance in the analysis of biological samples in 1998. Environment Agency : primary audit |
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| 528 | An audit of performance in the analysis of biological samples in 1999. Environment Agency : AQC audit |
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| 529 | River Stort fact file |
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| 530 | An audit of performance in the analysis of biological samples in 1999. Environment Agency : primary audit |
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| 531 | Management plan of Davenham fisheries depot |
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| 532 | Sewage treatment works remedial strategy : phase 2 report |
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| 533 | Bathing water quality in England and Wales 1999 : a summary report |
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| 534 | Discharge consent and compliance policy : a blueprint for the future |
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| 535 | A report on quality assurance procedures for use in biological surveys of marine/estuarine benthos |
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| 536 | Microalgal monitoring in coastal waters 1993-1995 |
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| 537 | Results of the oyster (Crassostrea gigas) embryo-larval biassay on samples taken during the winter phase of national maritime monitoring programme 1997 : interim report |
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| 538 | Assessment of the water quality before, during and post commissioning of the interim Falmouth sewage treatment scheme - Report No. TWQ/98/01- May 1998 |
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| 539 | ISCO automatic water sample data for the Wensum Demonstration Test Catchment's Kiosk B |
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| 540 | Groundwater protection zones : methodology and definition of protection zones (Bilingual) : Parthau gwarchod dwr daear : methodoleg a difiniad o'r parthau gwarchod |
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| 541 | Annual classification of river water quality 1991 : identification of possible causes of non-compliance with river quality objectives |
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| 542 | Framework for national groundwater quality reporting technical report |
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| 543 | NRA water quality strategy |
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| 544 | Further investigation of the pilot borehole at Bean's Lane, Wortham (94/7/912) : September 1994 |
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| 545 | IMPACTS - Interactive Monitoring using Prediction and Classification Techniques - A Review of Monitoring Tools and Datasets Relating to Freshwater Environments |
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| 546 | PRAIRIE(tm) Guidance |
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| 547 | Economic appraisal and assessment of benefits in the PR04 environment programme : findings of an environment agency seminar, January 2003 |
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| 548 | River Dart catchment river water quality classification 1991 |
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| 549 | The Ribble Estuary 1992 surveys : summary of results |
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| 550 | An assessment of mercury contamination in the Red River catchment : final draft report |
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