Skip to main content area
Department of Public Works
dpw.lacounty.gov
Home
Public Buildings
Environmental Services
Water Resources
Transportation
Development Services
Emergency Management
Residents
Report a problem
I want to
Get notified
Apply for a permit
Recycle
Pay my water bill
Apply for a job
Find where I can take my trash
Contact Public Works
Locate services in my area
Report Equity Violations
Reduce, Reuse, Recycle
Household Hazardous Waste
Residential Recycling Program
Trash Collection
Disposal Sites
Smart Gardening
Grass Recycling
Tire Recycling
Used Oil
Water Services
My Waterworks Account Manager
Waterworks
Rebate Program
Permits for Home Owners
Local Building Permit Offices
Building Permit Viewer
Report a Violation
Road & Flood Encroachment Permits
Local Encroachment Permit Offices
Subdivide Your Lot
Streets & Transportation
Road Closures
Bike Path Closures
Pedestrian/School Safety
Bikeways
LAGOBUS.info (Unincorporated Community Local Transit Service)
County Airports
L.A. County Trails
Traffic Programs & Services
Bouquet Canyon Creek Restoration
Flood Protection
Flood Information
National Flood Insurance Program
Homeowner's Guide for Flood, Debris, & Erosion Control
Flood Control Permit
Sewer Maintenance Services
Homeowner Information
Trap the Grease Program
Emergency Resources
Road Closures
Coordinated Agency Response Effort (CARE)
Fire Disaster Information
Sandbags
More >>
Businesses
Report a problem
Do Business with Public Works
Local Worker Hiring
I want to
Apply for a permit
Check my invoice payment status
Submit a bag ordinance quarterly report
Research Land Records Online
Submit disposal data
Contact Public Works
Environmental Related Services
Debris Recycling & Reuse Program
Business Trash Services
Conversion Technology
Industrial Waste
Underground Storage Tanks
Stormwater Pollution Prevention
Tree Planting Samples
Condition Assessment Program
Construction & Land Development Services
Surplus Properties
Land Records Information
Tract & Parcel Map Recordation
Building Permit Viewer
National Flood Insurance Program
Flood Insurance Assistance
Construction Permits
Subdividing Your Land
Streets & Transportation
Bicycle Master Plan
Disaster Routes
Traffic Programs & Services
County Airports
Government to Government
City Service Request Tracking System
Coordinated Agency Recovery Effort (CARE)
More >>
Projects
Online Services
eNotify
Forms
Road Closures
The Works
Pay My Water Bill
Request For A Service
EPIC-LA
Electronic Plan Check System
Materials Exchange Program (LACoMAX)
Invoice Payment Status Inquiry
Building Permit Viewer
Solid Waste Information Management System (SWIMS)
More >>
About Us
Overview
Organization Chart
Careers
Diversity
History
Contact Us
Watershed Management Home
About Us
What is a Watershed?
Major Watersheds
Municipal Stormwater Permit
Stakeholders Directory
Best Management Practices
Events
Hydrologic Report
Links
Regional Sediment Management Planning
LACFCD
Storm Drain System
Assistant Deputy Director/
Division Engineer:
Angela R. George
Assistant Division Engineers:
Keith Lilley
Paul Alva
Russ Bryden
For information call
(626) 458-4300
LOS ANGELES COUNTY
1994-2000 INTEGRATED
RECEIVING WATER IMPACTS
REPORT
TABLE OF CONTENTS
ADA Information
Acronyms and Abbreviations
Executive Summary
Section 1
Introduction
1.1 Purpose
1.2 Report Organization
1.3 Recap of Major Monitoring Elements
1.3.1 Santa Monica Bay Receiving Waters Impact Study
1.3.2 Mass Emissions
1.3.2.1 Pollutant Loading
1.3.3 Land Use Program
1.3.4 Critical Sources
1.4 Other Studies
1.4.1 Wide Channel Pilot Study
1.4.2 Low Flow Pilot Study
1.4.3 Aerial Deposition
1.4.4 El Niño Study by SCCWRP
1.4.5 River Toxicity
Section 2
Site Descriptions
2.1 1990 NPDES Permit - Sampling Sites
2.1.1 Automated Sampling Program-1990 NPDES Permit
2.2 1996 NPDES Permit - Sampling Sites
2.2.1 Site Selection
2.2.1.1 Mass Emission Site Selection
2.2.1.2 Land Use Site Selection
2.2.1.3 Critical Source Site Selection
2.2.2 Location and Drainage Area Descriptions
2.2.2.1 Mass Emission Monitoring Sites
2.2.2.2 Land Use Monitoring Sites
2.2.2.3 Critical Source Monitoring Sites
Section 3
Methods
3.1 Precipitation and Flow Measurement
3.1.1 Precipitation Monitoring
3.1.2 Flow Monitoring
3.2 Stormwater Sampling
3.2.1 Sample Collection Methods
3.2.2 Field Quality Assurance/Quality Control Plan
3.2.3 Sampling Frequency
3.3 Laboratory Analyses
3.3.1 Possible Constituents of Concern
3.3.2 Analytical Suite and Analytical Methods
3.3.3 Quality Assurance and Quality Control
3.4 Statistical Test Criteria
3.4.1 Land Use
3.4.2 Mass Emissions
Section 4
Results and Interpretation
4.1 Hydrology: Precipitation and Flow
4.2 Stormwater Quality
4.2.1 Overall Imperviousness
4.2.2 Bacterial Indicators
4.2.3 Stormwater Toxicity
4.2.4 Contaminated Sediments and Total Suspended Solids
4.2.5 Comparison of Mass Emission Concentrations to the Ocean
Plan, Basin Plan, and California Toxics Rule
4.2.6 Loading
4.2.6.1 GIS Loading Model
4.2.7 Constituents of Concern
4.2.8 Identification of Possible Sources
4.2.9 Best Management Practices for Critical Source Industries
Section 5
Conclusions and Recommendations
5.1 Objectives Achieved
5.1.1 Track Water Quality Status, Pollutant Trends and Pollutant
Loads, and Identify Pollutants of Concern
5.1.2 Monitor and Assess Pollutant Loads from Specific Land
Uses and Watershed Areas
5.1.3 Identify, Monitor and Assess Significant Water Quality
Problems Related to Stormwater Discharges Within the
Watershed
5.1.4 Identify Sources of Pollutants in Stormwater Runoff
5.1.5 Identify and Eliminate Illicit Discharges
5.1.6 Evaluate the effectiveness of Mgmt. Programs including
Pollutant Reductions Achieved by Implementation of
BMPs
5.1.7 Assess the Impacts of Stormwater Runoff on Receiving
Waters
5.2 Wide Channel Pilot Study
5.3 Low Flow Pilot Study
5.4 Future Monitoring Recommendations
5.4.1 Mass Emission Element
5.4.2 Land Use Element
5.4.3 Critical Source Element
5.4.4 TMDLs in Los Angeles County
5.4.5 Constituents of Concern
5.4.5.1 Bacteria
5.4.5.2 Contaminated Sediments
5.4.5.3 Stormwater Toxicity
5.4.6 Receiving Waters Impacts
5.4.7 Other Monitoring Activities
Section 6
References
Tables
Figures
Appendices
View a different report