2013-2014 Stormwater Monitoring Report

LOS ANGELES COUNTY
2013-14
STORMWATER MONITORING REPORT

TABLE OF CONTENTS

COVER
ACRONYMS
CERTIFICATION
ADA INFORMATION
DISCLAIMER
EXECUTIVE SUMMARY
	ES.1	Introduction
		ES.1.1	Core Monitoring Program
		ES.1.2	Regional Monitoring
	ES.2	Summary of Methodology
		ES.2.1	Precipitation and Flow Monitoring
		ES.2.2	MES and Tributary Wet and Dry Weather Sampling
	ES.3	Summary of Monitoring Results
		ES.3.1	Mass Emission Monitoring
		ES.3.2	Water Column Toxicity Analysis
		ES.3.3	Tributary Monitoring
		ES.3.4	Correlations to Total Suspended Solids
		ES.3.5	Wet Weather and Dry Weather Constituent Loads for Each Mass Emission Station
		ES.3.6	Total Suspended Solids Trend Analysis
		ES.3.7	Trash Monitoring
	ES.4	Recommendations

1.0 INTRODUCTION
	1.1	Monitoring Program Status
		1.1.1	Core Monitoring
			1.1.1.1	Mass Emission Monitoring
			1.1.1.2	Water Column Toxicity Monitoring
			1.1.1.3	Tributary Monitoring
			1.1.1.4	Shoreline Monitoring
			1.1.1.5	Trash Monitoring
		1.1.2	Regional Monitoring
			1.1.2.1	Estuary Sampling
			1.1.2.2	Bioassessment
		1.1.3	Special Studies

2.0 STATION DESCRIPTIONS
	2.1	Mass Emission Station Selection
	2.2	Mass Emission Station Monitoring Locations and Drainage Areas
	2.3	Tributary Station Selection
	2.4	Tributary Monitoring Locations and Drainage Areas

3.0 METHODS
	3.1	Precipitation and Flow Monitoring
		3.1.1	Precipitation Monitoring
		3.1.2	Flow Monitoring
	3.2	Wet Weather and Dry Weather Monitoring
		3.2.1	Wet Weather Sample Collection Methods
		3.2.2	Dry Weather Sample Collection Methods
		3.2.3	Field Quality Assurance / Quality Control
			3.2.3.1	Field Setup Procedures
			3.2.3.2	Bottle Preparation
			3.2.3.3	Chain-of-Custody Procedure
			3.2.3.4	New Zealand Mud Snails
	3.3	Laboratory Analyses
		3.3.1	Toxicity Analysis

4.0 RESULTS, ANALYSES, AND RECOMMENDATIONS
	4.1	Hydrology – Precipitation and Flow
		4.1.1	Analysis of Precipitation and Flow Data and a Discussion of the Hydrographs
		4.1.2	Hydrographs for Monitoring Stations
	4.2	Stormwater Quality
		4.2.1	Comparison to Water Quality Objectives
		4.2.2	Mass Emission Stations During Wet Weather
			4.2.2.1	Ballona Creek (S01)
			4.2.2.2	Malibu Creek (S02)
			4.2.2.3	Los Angeles River (S10)
			4.2.2.4	Coyote Creek (S13)
			4.2.2.5	San Gabriel River (S14)
			4.2.2.6	Dominguez Channel (S28)
			4.2.2.7	Santa Clara River (S29)
		4.2.3	Tributary Stations During Wet Weather
			4.2.3.1	Upper Las Virgenes Creek (TS25)
			4.2.3.2	Cheseboro Canyon (TS26)
			4.2.3.3	Lower Lindero Creek (TS27)
			4.2.3.4	Medea Creek (TS28)
			4.2.3.5	Liberty Canyon Channel (TS29)
			4.2.3.6	PD 728 @ Foxfield Drive (TS30)
		4.2.4	Mass Emission Stations During Dry Weather
			4.2.4.1	Ballona Creek (S01)
			4.2.4.2	Malibu Creek (S02)
			4.2.4.3	Los Angeles River (S10)
			4.2.4.4	Coyote Creek (S13)
			4.2.4.5	San Gabriel River (S14)
			4.2.4.6	Dominguez Channel (S28)
			4.2.4.7	Santa Clara River (S29)
		4.2.5	Tributary Stations during Dry Weather
			4.2.5.1	Upper Las Virgenes Creek (TS25)
			4.2.5.2	Cheseboro Canyon (TS26)
			4.2.5.3	Lower Lindero Creek (TS27)
			4.2.5.4	Medea Creek (TS28)
			4.2.5.5	Liberty Canyon Channel (TS29)
			4.2.5.6	PD 728 @ Foxfield Drive (TS30)
		4.2.6	Summary of Constituents That Did Not Meet Water Quality Objectives
			4.2.6.1	Mass Emission Stations
			4.2.6.2	Tributary Monitoring Stations
	4.3	Total Suspended Solids Analyses
		4.3.1	Correlations to Total Suspended Solids
		4.3.2	Watershed Load Analysis
			4.3.2.1	Wet Weather and Dry Weather Constituent Loads for Each Mass Emission Station
		4.3.3	Total Suspended Solids Trend Analysis
	4.4	Water Column Toxicity Analysis
		4.4.1.1	Toxicity Results – Wet Weather
		4.4.1.2	Toxicity Results – Dry Weather
		4.4.2	Trash Monitoring Analysis
		4.4.3	Identification of Possible Constituent Sources
			4.4.3.1	Indicator Bacteria
			4.4.3.2	Copper, Lead and Zinc
			4.4.3.3	Sulfate
			4.4.3.4	pH
			4.4.3.5	Cyanide
	4.5	Recommendations

5.0 REFERENCES

TABLES

Table 1-1	Bioassessment Site Locations
Table 2-1a	Land Use Distribution for MES Areas
Table 2-1b	Land Use Distribution for Tributary Areas
Table 3-1	Analytical Methods for Constituents
Table 4-1	Summary of Mass Emission Station Data
Table 4-2a	Analytical Data Inventory – Wet
Table 4-2b	Analytical Data Inventory – Dry
Table 4-3	Toxicity Data Inventory
Table 4-4	Summary of Mass Emission Station Exceedances
Table 4-5	Summary of Tributary Exceedances
Table 4-6	Total Suspended Solids Concentrations for Mass Emission Stations
Table 4-7	Total Suspended Solids Correlations Results
Table 4-8	Total Suspended Solids Loads for Mass Emission Stations
Table 4-9	Estimated Loads
Table 4-10a	Summary of Toxicity Results – Dry
Table 4-10b	Summary of Toxicity Results – Wet
Table 4-11	Total Suspended Solids Trends Results

FIGURES

Figure 1-1	Bioassessment Monitoring Locations
Figure 2-1	Mass Emission Sampling Locations
Figure 2-2	Ballona Creek Sampling Location
Figure 2-3	Malibu Creek Sampling Location
Figure 2-4	Los Angeles River Sampling Location
Figure 2-5	Coyote Creek Sampling Location
Figure 2-6	San Gabriel River Sampling Location
Figure 2-7	Dominguez Channel Sampling Location
Figure 2-8	Santa Clara River Sampling Location
Figure 2-9	Tributary Areas in Malibu Creek Watershed
Figure 2-10	Upper Las Virgenes Creek (TS25) Tributary Monitoring Location
Figure 2-11	Cheseboro Canyon (TS26) Tributary Monitoring Location
Figure 2-12	Lower Lindero Creek (TS27) Tributary Monitoring Location
Figure 2-13	Medea Creek (TS28) Tributary Monitoring Location
Figure 2-14	Liberty Canyon Channel (TS29) Tributary Monitoring Location
Figure 2-15	PD 728 at Foxfield Drive (TS30) Tributary Monitoring Location
Figure 4-1	Historic Rainfall at Ducommun St
Figure 4-2	Rainfall at Ducommun St, 13/14 Season
Figure 4-3.1	S01 Ballona Creek @ Sawtelle Blvd Wet Weather Ratio Plots
Figure 4-3.2	S02 Malibu Creek @ Piuma Rd Wet Weather Ratio Plots
Figure 4-3.3	S10 Los Angeles River @ Wardlow Wet Weather Ratio Plots
Figure 4-3.4	S13 Coyote Creek @ Spring St Wet Weather Ratio Plots
Figure 4-3.5	S14 San Gabriel River Wet Weather Ratio Plots
Figure 4-3.6	S28 Dominguez Channel @ Artesia Blvd Wet Weather Ratio Plots
Figure 4-3.7	S29 Santa Clara River Wet Weather Ratio Plots
Figure 4-4.1	TS25 Upper Las Virgenes Creek Wet Weather Ratio Plots
Figure 4-4.2	TS26 Cheseboro Canyon Wet Weather Ratio Plots
Figure 4-4.3	TS27 Lower Lindero Creek Wet Weather Ratio Plots
Figure 4-4.4	TS28 Medea Creek Wet Weather Ratio Plots
Figure 4-4.5	TS29 Liberty Canyon Channel Wet Weather Ratio Plots
Figure 4-4.6	TS30 PD 728 at Foxfield Drive Wet Weather Ratio Plots
Figure 4-5.1	S01 Ballona Creek @ Sawtelle Blvd Dry Weather Ratio Plots
Figure 4-5.2	S02 Malibu Creek @ Piuma Rd Dry Weather Ratio Plots
Figure 4-5.3	S10 Los Angeles River @ Wardlow Dry Weather Ratio Plots
Figure 4-5.4	S13 Coyote Creek @ Spring St Dry Weather Ratio Plots
Figure 4-5.5	S14 San Gabriel River Dry Weather Ratio Plots
Figure 4-5.6	S28 Dominguez Channel @ Artesia Blvd Dry Weather Ratio Plots
Figure 4-5.7	S29 Santa Clara River Dry Weather Ratio Plots
Figure 4-6.1	TS25 Upper Las Virgenes Creek Dry Weather Ratio Plots
Figure 4-6.2	TS26 Cheseboro Canyon Dry Weather Ratio Plots
Figure 4-6.3	TS27 Lower Lindero Creek Dry Weather Ratio Plots
Figure 4-6.4	TS28 Medea Creek Dry Weather Ratio Plots
Figure 4-6.5	TS29 Liberty Canyon Channel Dry Weather Ratio Plots
Figure 4-6.6	TS30 PD 728 at Foxfield Drive Dry Weather Ratio Plots
Figure 4-7.1	S01 Ballona Creek @ Sawtelle Blvd Wet Weather Correlation Plots
Figure 4-7.2	S02 Malibu Creek @ Piuma Rd Wet Weather Correlation Plots
Figure 4-7.3	S10 Los Angeles River @ Wardlow Wet Weather Correlation Plots
Figure 4-7.4	S13 Coyote Creek @ Spring St Wet Weather Correlation Plots
Figure 4-7.5	S14 San Gabriel River Wet Weather Correlation Plots
Figure 4-7.6	S28 Dominguez Channel @ Artesia Blvd Wet Weather Correlation Plots
Figure 4-7.7	S29 Santa Clara River Wet Weather Correlation Plots
Figure 4-8.1	TS25 Upper Las Virgenes Wet Weather Correlation Plots
Figure 4-8.2	TS26 Cheseboro Canyon Wet Weather Correlation Plots
Figure 4-8.3	TS27 Lower Lindero Creek Wet Weather Correlation Plots
Figure 4-8.4	TS28 Medea Creek Wet Weather Correlation Plots
Figure 4-8.5	TS29 Liberty Canyon Channel Wet Weather Correlation Plots
Figure 4-8.6	TS30 PD 728 at Foxfield Drive Wet Weather Correlation Plots
Figure 4-9	Mass Emission Station Total Suspended Solids Wet Concentrations
Figure 4-10	Tributary Station Total Suspended Solids Wet Concentrations
Figure 4-11	Mass Emission Station Total Suspended Solids Dry Concentrations
Figure 4-12	Tributary Station Total Suspended Solids Dry Concentrations
Figure 4-13	Total Suspended Solids Trend Analysis Plots

APPENDICES

A.	Hydrographs for Catchments Monitored During Storms
B.1.	Monitoring Results for Mass Emission and Tributary Monitoring Stations (Wet)
B.2.	Monitoring Results for Mass Emission and Tributary Monitoring Stations (Dry)
C.	Visual Trash Photos at Mass Emission Stations after Storm Events
D.	City of Los Angeles Shoreline Monitoring Report
E.	City of Santa Monica (Santa Monica Urban Runoff Recycling Facility) Raw Data
F.	Costs
G.	Contacts
H.	Bioassessment Monitoring Report
I.	Ballona Creek Watershed Trash TMDL Monitoring and Annual Report
J.1.	Los Angeles River Watershed Trash Report (Part 1)
J.2.	Los Angeles River Watershed Trash Report (Part 2 Compliance Summary Report)
J.3.	Los Angeles River Watershed Trash Report (Part 3 Certified full capture systems data)
K.1.	Event ID Table (Mass Emissions Stations)
K.2.	Event ID Table (Malibu Tributary Stations)

LOS ANGELES COUNTY 2013-14 STORMWATER MONITORING REPORT

LOS ANGELES COUNTY
2013-14
STORMWATER MONITORING REPORT