Beach Water Quality. Ewan Moffat, Environmental Health Specialist, Recreational Water Program

Transcription

1 Beach Water Quality Ewan Moffat, Environmental Health Specialist, Recreational Water Program

2 Items to be Discussed Sampling Locations Advisories, General Advisories, Closures Sept, 2011 Power Outage Sewage Spill South County TJ River Issues Playas de Tijuana Sewage Spills Contact Information

3 AB-411 Sampling Locations North South 40 City Samples per week 45 DEH Samples per week

4 Advisory - Bacteria Exceedence Total Coliform > 10,000 cfu / 100 ml Fecal Coliform > 400 cfu / 100 ml Enterococcus > 104 cfu / 100 ml

5 Precautionary Advisory Excavation of Lagoon / River Outlet San Elijo, Los Penasquitos, Etc.

6 General (Rain) Advisory 72-hour Duration Following Significant Rain (>0.2 Coastal Areas). No Signs Posted Phone Message (619) Websites Updated Press Release

7

8 Closures Confirmed SD County Sewage Spill (SSO) Dog Beach, IB Pier Etc. TJ River Impacts

9 Example of SD County Sewage Spill SSO Spill Power Outage Pump Station Failure at Roselle Street

10 1.9 Million Gallon Spill Pump Station Failure in Roselle Street (Sorrento Valley) Most of the 1.9 Million Gallons went to Los Penasquitos Lagoon Outlet and Beaches Solana Beach, Del Mar, Torrey Pines to Scripps Pier Closed

11 Solana Beach to Scripps Pier Location of Spill Flow of Spill Outlet Beaches Closed Plume

12 Del Mar to Scripps Pier (Solana Beach Reopened) Location of Spill Flow of Spill Outlet Beaches Closed Plume Beaches Re-Opened

13 15 th St. Del Mar to Scripps Pier Location of Spill Flow of Spill Beaches Closed Beaches Re-Opened

14 Scripps Pier and Black s Beach Reopened. Location of Spill Flow of Spill Beaches Closed Beaches Re-Opened

15 Los Penasquitos Outlet One Mile North & South All Beaches Open Sept 14, 2011 (6-days Location of Spill later) Flow of Spill Beaches Closed Beaches Re-Opened All Beaches Open (6-days later)

16 South County TJ River Spills

17 Non Diverted TJ River Flow Beach Closure Saturn Blvd Dairy Mart Bridge TJ Foot Bridge

18 Dairy Mart Bridge Facing North

19 Not Diverted (Flow Under Dairy Mart Bridge) Facing South

20 View of TJ River from Dairy Mart Bridge facing west. Positive flow.

21 Non Diverted TJ River Flow Beach Closure Saturn Blvd Dairy Mart Bridge TJ Foot Bridge

22 View of TJ River from Saturn Blvd facing south. Positive flow. NOTE: River does not usually flow over the road. Usually one would look on east side (where the trees are) for flowing water.

23 Criteria for TJ Estuary Closure (Borderfield / TJSNWRS) Non Diverted TJ River Flow into US (Discharge to Beaches) Metal Contamination Warning Sign South End of Seacoast Flipped.

24

25 Diverted TJ River Flow Saturn Blvd Dairy Mart Bridge TJ Foot Bridge

26 View of TJ River from Dairy Mart Bridge facing east. No flow Entire area DRY.

27 Diverted (No Flow to Beaches) View of TJ River from Dairy Mart Bridge facing east. No flow entire area DRY.

28 Two Criteria for IB Closure Non Diverted TJ River Flow into US and Towards TJ Estuary Discharge to Beaches AND Significant S-N Nearshore Flow BOTH Criteria Must Exist for IB Closure

29 Methods to Verify IB Impacts Flowchart Combines: SCCOOS Website Field Observations Sample Results Forecasts (i.e. NW Swell?) The Combination of All of These Ensures the Best Decision

30 SCCOOS Website

31 Field Observations (IB Shoreline) Quality of Water (Odors, Color, Turbidity) Somewhat SUBJECTIVE Nearshore Flow Direction More OBJECTIVE

32 Fishermen Are Usually on Side of Pier at Direction of Nearshore Flow (so Lines Don t Go Under Pier) North South Near Shore Current.

33 Sample Results Used Primarily to Re-Open 24-hours to Get Results

34 Sample Locations to Reopen IB

35 Re Opening of TJ Estuary

36 Re Opening of TJ Estuary Sequence of Events Diverted TJ River flow (Turned on) ~ One week wait (flush out TJ Estuary) Samples taken at TJ Rivermouth 2 sets of clean samples to re-open

37 Sample Locations To Reopen TJ Estuary

38 R TJR IB MZ TJR IB R TJR IB MZ

39 TJ Estuary 2 sets of clean samples Sign flipped to Open Good to go

40 Sewage Spills from Playas de Tijuana #1 Dec 23, 2010 Jan Rain-storms eroded ground below a pipe Approximately 31 Million Gallons Total US Beaches were currently closed due to TJ River impacts.

41 Beaches Already Closed due to TJ River Impacts TJ Rivermouth Mexico Spill

42 Sewage Spills from Playas de Tijuana #2 Aug 28-30, 2012 Damaged pipe Approximately 5 Million Gallons Total Prior to spill, all US beaches were open Imperial Beach closed from Aug TJ Estuary Closed from Aug 28 Sept 4

43 Estimated Plume from 2012 Spill TJ Rivermouth Mexico Spill

44 Contact Information Feel Free to if Questions.

45 BEACH QUALITY INFORMATION Phone Hotline (619) BEACH STATUS PLUME TRACKER