EXH0426022300

IDENTIFICATION OF OTHER SOURCES OF POLLUTANTS ............. ix METALS SPECIATION ........................................ x VEGETATION MANAGEMENT .................................. x STIR.EMBANK EROSION ...................................... xi 1. INTRODUCTION ............................................ 1 2. INSTILEAM TOXICITY ........................................ 4 2.1 INTRODUCTION ...................................... 4 2.2 METHODS ......................................... 4 2.3 BIOASSAYS IN MILLER CREEK ......................... 7 2.4 BIOASSAYS IN DES MOINES CREEK ..................... 7 2.5 SUMMARY ......................................... 9 3. SEDIMENTS ............................................... 12 3.1 MILLER CREEK .................................... 12 3.1.1 Methods ................................... 12 3.1.2 Results .................................... 13 3.1.3 Discussion .................................. 13 3.2 DES MOINES CREEK ................................ I5 3.2.1 Results .................................... 16 3.2.2 Discussion 16 3.3 OTHER SEDIMENT QUALITY DATA ..................... 16 3.4 SUMMARY ........................................ 18 4. IDENTIFICATION OF OTHER SOURCES OF POLLUTANTS ............ 20 4.1 INTRODUCTION .................................... 20 4.2 MILLER CREEK BASIN ............................... 20 4.2.1 Miller Creek Land Uses and Other Sources of Pollution... 20 4.2.2 Estimated Storm Event Pollutant Loading ............ 23 4.3 DES MOINES CREEK BASIN ........................... 25 4.3.1 Potential Sources of Other Pollution ................ 25 4.3.2 Estimated Storm Event Pollutant Loading ............ 27 StormWaterReceiving EnvironmentMonitoringReport . ii June 1997 - AR 022302 TABLE OF CONTENTS (continued) Page 5. METALS SPECIATION ....................................... 33 5.1 METALS CONCENTRATIONS .......................... 33 5.2 METHODS ........................................ 33 5.3 RESULTS ......................................... 34 5.3.1 Cadmimn .................................. 37 5.3.2 Copper .................................... 37 5.3.3 Lead ...................................... 39 5.3.4 Nickel ..................................... 40 5.3;5 Zinc ...................................... 40 6. VEGETATION MANAGEMENT ................................. 41 6.1 EXISTING RIPARIAN VEGETATION AND VEGETATION MANAGEMENT ......................... 41 6.1.1 Miller Creek ................................ 41 6.1.2 Des Moines Creek ............................ 43 6.2 TEMPERATURE EFFECTS ............................. 44 6.2.1 Miller Creek ................................ 44 6.2.2…

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PSCAA Advisory Council Meeting Agenda
Add to CalendarMWednesday Mar 11, 9:00am - 11:35am
1904 3rd Avenue, Suite 105, Seattle, WA 98101
Call to order – Roll Call – Quorum Established – Land Acknowledgement We would like to acknowledge that our Agency operates in four present-day counties, which are the traditional lands of the Coast Salish people, past and present. This acknowledgement does not take the place of authentic relationships with indigenous communities in our jurisdiction and [...]