| Resources Information Standards Committee |
| Guidelines
for Interpreting Water Quality Data
Prepared by
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1. INTRODUCTION
2. SCREENING/EDITING DATA
3. COMPILING DATA
4. PRESENTATION OF DATA AND DATA ANALYSIS
5. INTERPRETING DATA
5.1 Guide To Interpreting Ambient Water and Effluent Variables
5.1.1 General
1. Temperature
5.1.2 Nutrients (Nitrogen and Phosphorus)·
1. Ammonia (NH3)
5.1.3 Halides
1. Chloride
5.1.4 Metals
1. Aluminum
5.1.5 Organics
1. Polychlorinated biphenyls (PCBs)
3. Polychlorinated Dibenzo-p-dioxins and Polychlorinated dibenzofurans (PCDDs and PCDFs)
4. Polycyclic Aromatic Hydrocarbons (PAHs)
5.2 Guide To Interpreting Sediment Variables
5.2.1 Particle size distribution (induced benthic sedimentation)
1. Arsenic
5.2.3. Organics
1. Organochlorine compounds
5.3 Guide To Interpreting Biological Variables
5.3.1 Bacteria, coliform
5.3.2 Quantification of benthic macroinvertebrate communities
1. Biosurvey analyses of community structure
5.3.3 Quantification of periphyton and phytoplankton communities
1. Biosurvey analyses of microflora populations
5.3.4 Macrophyte taxonomy
1. Lead
1. Polychlorinated biphenyls (PCBs)
5.4 The Use of Surrogate Variables - Guide to Relate Surrogate Values To Other Variables
5.4.1 Total Hardness when surrogates calcium and magnesium were sampled
5.4.2 Total Dissolved Solids when surrogate Conductivity was sampled-
6. REPORTING FORMAT
7. PEER REVIEW
Appendix A. Hypothesis Test of a Hypothetical Data Set to Determine if Variances Differ (the F-test)
Appendix B. Analysis of Hypothetical Pilot Study Data to Assess if Proposed Control Site and First Down-stream Treatment Site Exhibit Spatial Homogeneity - A Statistical Test of the Spatial Difference in the Mean Concentrations of Kjeldahl Nitrogen Between Two Sites
Appendix C. Analysis of Hypothetical Data to Assess if First Down-stream Treatment Site Exhibits Temporal Difference Between Pre-treatment and Post-treatment Periods - A Statistical Test of the Temporal Difference in the Mean Concentrations of Kjeldahl Nitrogen at a Single Site
Appendix
D. Analysis of Hypothetical Data to Assess if an Objective is Exceeded
- A Statistical Test to Determine if the Mean Concentration of Kjeldahl Nitrogen
at a Single Site is Greater than the Objective Set for the Stream
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