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Direct Toxicity Assessment

UK Direct Toxicity Assessment (DTA) Demonstration Programme River Esk Project

Reference: 00/TX/02/02
ISBN: 1 84057 223 X
Published Date: 17/04/2002

As part of a trial of a DTA approach in the UK a case study was study carried out on the River Esk between Langholm and Canonbie (Dumfrieshire), a location where pesticides were believed to be affecting receiving water quality. The project was designed to evaluate selected elements of a proposed DTA protocol, short- term (largely lethal) ecotoxicity tests and associated procedures for effluent control in a freshwater catchment. The results showed limited evidence of short- term (largely lethal) ecotoxicity in the Esk even though the Langholm STW final effluent showed ecotoxicity when traders were discharging. Risk assessments of the final effluent provided conclusions consistent with the receiving water data. The learning points and recommendations from the case study will be used in the development of Technical Guidance. WE OFFER 7 REPORTS (00/TX/02/01,2,3,4,5,6,7) THROUGH OUR WEBSITE FOR A TOTAL OF £400. THE WEBSITE WILL PROCESS YOUR ORDER AT FULL PRICE AND THEN REFUND YOUR CREDIT CARD WITH THE DIFFERENC

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UK Direct Toxicity Assessment (DTA) Demonstration Programme Review of Toxicity ReductionEvaluations at Sewage Treatment Works

Reference: 00/TX/02/05
ISBN: 1 84057 226 4
Published Date: 17/04/2002

As part of a trial of a DTA approach in the UK a second element of a case study was study carried out on a 5.5 km reach of the Lower Tees estuary, a The River Esk and Lower Tees Estuary DTA case studies have involved the conduct of toxicity reduction exercises at small and complex STW respectively to provide information for the development of good practice. However, it was also considered valuable to review the literature data on toxicity reduction exercises at sewage treatment works worldwide. It was evident from the data considered that the most appropriate procedure for a particular site needs to be identified and applied rather than using the techniques in a mechanistic manner. A site- specific programme needs to assesses the variability in final effluent ecotoxicity as well as that of the toxic inputs to the sewage treatment works. WE OFFER 7 REPORTS (00/TX/02/01,2,3,4,5,6,7) THROUGH OUR WEBSITE FOR A TOTAL OF £400. THE WEBSITE WILL PROCESS YOUR ORDER AT FULL PRICE AND THEN REFUND YOUR CREDIT CARD WIT

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UK Direct Toxicity Assessment (DTA) Demonstration Programme Recommendations from the Steering Group to the Environmental Regulators

Reference: 00/TX/02/06
ISBN: 1 84057 228 0
Published Date: 17/04/2002

This report brings together the experience gained from a wide ranging demonstration programme designed to examine the practicalities of using whole effluent ecotoxicity tests to assess and control the quality of complex effluents released from industrial sources and sewage treatment works. It does not attempt to determine the cost of implementing such an approach. The immediate aim was to trial methodologies that can predict effects on the survival, growth and development of aquatic organisms and help control them. WE OFFER 7 REPORTS (00/TX/02/01,2,3,4,5,6,7) THROUGH OUR WEBSITE FOR A TOTAL OF £400. THE WEBSITE WILL PROCESS YOUR ORDER AT FULL PRICE AND THEN REFUND YOUR CREDIT CARD WITH THE DIFFERENCE

Price: £75