INTRODUCTION<br>1 Scope<br>2 Normative references<br>3 Terms and definitions<br>4 Principles of toxic hazard assessment<br>5 Methods of toxic hazard assessment<br>6 Toxic potency values<br>7 Limitations on the interpretation of toxicity test results<br>8 Effluent components to be measured<br>Annex A (informative) - Guidance for the use of LC[50] values<br>Annex B (informative) - A simple worked example to illustrate<br> the principles of a toxic hazard analysis<br>Annex C (informative) - F values for irritants<br>Annex ZA (normative) - Normative references to international<br> publications with their corresponding European<br> publications<br>Bibliography