Dickinson BayouSupporting Data #2

CIVE 4312Spring 2010

Contact Recreation StandardsContact Recreation Standards

Indicator BacteriaGeometric Mean Concentration

Not to Exceed Concentration

Fecal Coliform (cfu/dL) 200 400

E. coli (MPN/dL) 126 394

Enterococci (MPN/dL) 35 89

cfu--colony forming unit, MPN -- most probable number

Dickinson Dickinson BayouBayou Map Map

Dickinson Dickinson BayouBayou, Segments, Segments

Segment Segment 11041104

Segment Segment 11031103

Segment Segment 1103B1103B

Segment Segment 1103C1103C

Segment Segment 1103A1103A

Segment Segment 1103D1103DSegment Stream Name

1103 Dickinson Bayou Tidal

1104 Dickinson Bayou Above Tidal

1103A Bensons Bayou

1103B Bordens Gully

1103C Geislers Bayou

1103D Gum Bayou

Summary of Land Use in WatershedSummary of Land Use in Watershed

Data source: HGAC, 2002

Land Use MapLand Use Map

Data source: HGAC, 2002

Exceedances of the Single Sample StandardExceedances of the Single Sample Standard

* Data from GCHD could not be fully validated because of insufficient QA/QC data

Criteria used for TCEQ’s WQ assessment:: 1104 = E. coli 1103 = Enterococci

Blank histograms indicate compliance with the Geometric Mean Standard

Exceedances of the Geometric Mean StandardExceedances of the Geometric Mean Standard

* Data from GCHD could not be fully validated because of insufficient QA/QC data

Criteria used for TCEQ’s WQ assessment:: 1104 = E. coli 1103 = Enterococci

Blank histograms indicate compliance with the Geometric Mean Standard

1

10

100

1000

10000

100000

1/1/1999 2/5/2000 3/11/2001 4/15/2002 5/20/2003 6/23/2004 7/28/2005 9/1/2006Date

E. c

oli

(M

PN

/100

mL

)

FO

GC

UI

Geometric mean standard

Single sample standard

StationID 11467

Enterococci vs. Time, Upper Region StationEnterococci vs. Time, Upper Region Station

Geometric mean of data = 272 MPN/dL% Exceedance of single sample standard (394 MPN/dL) = 34%

Enterococci vs. Time, Mid Region StationEnterococci vs. Time, Mid Region Station

0.1

1

10

100

1000

10000

100000

1/1/1999 2/5/2000 3/11/2001 4/15/2002 5/20/2003 6/23/2004 7/28/2005 9/1/2006Date

En

tero

cocc

i (M

PN

/100

mL

)

FO

GC

UI

Geometric mean standard

Single sample standard

StationID 11464

Geometric mean of data = 128 MPN/dL% Exceedance of single sample standard (89 MPN/dL) = 61%

Enterococci vs. Time, Lower Region StationEnterococci vs. Time, Lower Region Station

0.01

0.1

1

10

100

1000

10000

100000

1/1/1999 2/5/2000 3/11/2001 4/15/2002 5/20/2003 6/23/2004 7/28/2005 9/1/2006Date

En

tero

cocc

i (M

PN

/100

mL

)

FO

GC

UI

Geometric mean standard

Single sample standard

StationID 11460

Geometric mean of data = 272 MPN/dL% Exceedance of single sample standard (89 MPN/dL) = 34%

E. ColiE. Coli Geometric Mean Concentrations Geometric Mean Concentrations

1

10

100

1000

0 5 10 15 20 25

Distance from mouth of Dickinson Bayou (miles)

E.c

oli

(MP

N/1

00 M

or

#/10

0 m

L)

Main stem

Tributary

GCHD Data*

Segment ID 1103

* Data from GCHD could not be fully validated because of insufficient QA/QC data

Segment ID 1104

E. ColiE. Coli Concentrations at TCEQ Stations Concentrations at TCEQ Stations

LEGEND

E. coli Geometric Mean

Enterococci Geometric Mean ConcentrationsEnterococci Geometric Mean Concentrations

1

10

100

1000

0 5 10 15 20 25

Distance from mouth of Dickinson Bayou (miles)

En

tero

cocc

i (M

PN

/100

mL

or

#/10

0mL

)

Main stem

Tributary

GCHD Data*

Segment ID 1103 Segment ID 1104

* Data from GCHD could not be fully validated because of insufficient QA/QC data

Enterococci Concentrations at TCEQ StationsEnterococci Concentrations at TCEQ Stations

LEGEND

Enterococci Geometric Mean

Outfalls Analyzed by Galveston County Health DistrictOutfalls Analyzed by Galveston County Health District

ID Size Description

D3 24” Outfall draining residential land to Geisler Bayou

D4 24” Outfall draining residential land to Bensons Bayou

D5 48” Confluence of two 48” box culverts draining commercial and residential land

D6 - Open drainage ditch draining residential land, and large mobile home park to Gum Bayou

D7 48” Concrete culvert draining commercial land (car wash)

D8 36” Outfall draining undeveloped and residential land

D9 24” Open culvert draining undeveloped and residential land to Bensons Bayou

D10 - Open drainage ditch draining residential land

* Data from GCHD could not be fully validated because of insufficient QA/QC data

Summary Outfall Data from GCHDSummary Outfall Data from GCHD

Station ID

Land Use# of

Samples% >394 MPN/dL

Date RangeGeometric

Mean (cfu/dL)

D3* Residential 18 83% Dec 2003 - Apr 2007 522

D4* Residential 22 41% Dec 2003 - Apr 2007 369

D5*Comm/

Residential18 56% Dec 2003 - Apr 2007 383

D6* Residential 21 14% Dec 2003 - Apr 2007 134

D7* Commercial 15 40% Dec 2003 - Apr 2007 267

D8*Undev/

Residential21 38% Dec 2003 - Apr 2007 260

D9*Undev/

Residential22 23% Dec 2003 - Apr 2007 145

D10* Residential 18 67% Dec 2003 - Apr 2007 498

* Data from GCHD could not be fully validated because of insufficient QA/QC data

GCHD Sampling LocationsGCHD Sampling Locations

LEGEND

E. coli Geometric Mean

* Data from GCHD could not be fully validated because of insufficient QA/QC data

Surface Temperature and BacteriaSurface Temperature and Bacteria

1

10

100

1000

10000

100000

0-20 °C 20-30 °C 30 °C +

Temperature (°C)

E. c

oli

(MP

N/d

L)

Segment 1104

1

10

100

1000

10000

100000

0-20 °C 20-30 °C 30 °C +

minimum

75th pct

maximum

25th pct

geomean

median

1

10

100

1000

10000

100000

0-20 °C 20-30 °C 30 °C +

Temperature (°C)

E. c

oli

(MP

N/d

L)

75th pct

maximum25th pctgeomeanmedian

Segment 1103

0.1

1

10

100

1000

10000

100000

0-20 °C 20-30 °C 30 °C +

Temperature (°C)

En

tero

cocc

i (M

PN

/dL

)

75th pct

maximum

25th pct

geomean

median

Segment 1103

0.1

1

10

100

1000

10000

100000

0-20 °C 20-30 °C 30 °C +

Temperature (°C)

En

tero

co

cc

i (M

PN

/dL

)75th pct

maximum

25th pct

geomean

median

Segment 1104

Surface Salinity and BacteriaSurface Salinity and Bacteria

0.1

1

10

100

1000

10000

100000

<3 ppt(freshwater)

3 to 16 ppt(brackish)

> 16 ppt (seawater)

Salinity (µS/cm)

En

tero

cocc

i (M

PN

/dL

)

75th pct

maximum

25th pct

geomean

median

Segment 1103

0.1

1

10

100

1000

10000

<3 ppt(freshwater)

3 to 16 ppt(brackish)

> 16 ppt (seawater)

En

tero

co

cc

i (M

PN

/dL

)75th pct

maximum

25th pct

geomean

median

(n=2)

Segment 1104

1

10

100

1000

10000

100000

<3 ppt(freshwater)

3 to 16 ppt(brackish)

> 16 ppt (seawater)

E. c

oli

(MP

N/d

L)

75th pct

maximum

25th pct

geomean

median

Segment 1103

1

10

100

1000

10000

100000

<3 ppt(freshwater)

3 to 16 ppt(brackish)

> 16 ppt (seawater)

E. c

oli

(MP

N/d

L)

75th pct

maximum

25th pct

geomean

median

(n=2)

Segment 1104

1

10

100

1000

10000

100000

0-20 °C 20-30 °C 30 °C +

minimum

75th pct

maximum

25th pct

geomean

median

NPDES Discharge InformationNPDES Discharge Information

TCEQ Permit ID PermitteePermitted Flow

(MGD)

WQ0000377-000 Penreco 0.075

WQ0003416-000Waste Management of Texas,

Inc.2.23

WQ0003749-000 Hillman Shrimp & Oyster Co. 0.07

WQ0004086-000 Duratherm, Inc. n/a

WQ0003479-000 Sea Lion Technology 0.02

WQ0010173-001 Galveston County WCID 1 4.8

WQ0012935-001 Pine Colony WWTF 0.05

WQ0013632-001 Meadowland Utility Corp 0.023

WQ0014326-001 Via Bayou Inc 0.02

WQ0014440-001 R West Development Co., Inc. 0.24

WWTP Map, Permitted FlowsWWTP Map, Permitted Flows

0.02 MGD

0.03 – 0.08 MGD

0.09 – 0.24 MGD

0.25 – 2.23 MGD

2.24 – 4.80 MGD

LEGEND

Eagle Point Tide ElevationsEagle Point Tide Elevations

Tributary Stations 2008 Data CollectionTributary Stations 2008 Data Collection

20475

20476

20477

Sampling Locations

Tributary Station Data 2008Tributary Station Data 2008

Constituent 20475 20477DO (mg/L) 7.2 5.1

Salinity (ppt) 0.3 1.0

TSS (mg/L) 14.9 25.8

TKN (mg/L) 8.7 10.2

Total P (mg/l) 0.2 0.3

E. coli (MPN/dL) 354 1,128Enterococci (MPN/dL) N/A 1,697

dL – deciliter, DO – dissolved oxygen, L – Liter, mg- milligrams, MPN – most probable number, ppt – part per thousand

n = 7n = 7

Tributary Wet/Dry Data 2008Tributary Wet/Dry Data 2008

Constituent Station Wet Weather

Dry Weather

TSS (mg/L) 20475 17.4 9.1

20477 31.0 13.6

E. coli (MPN/dL) 20475 354 4

20477 1,128 158

Enterococci (MPN/dL)

20475 N/A N/A

20477 7,629 51

dL – deciliter, L – Liter, mg- milligrams, MPN – most probable number

Bayou Wildlife ParkBayou Wildlife Park

Bayou Wildlife ParkBayou Wildlife Park

Wildlife Park CharacteristicsWildlife Park Characteristics

• 81-acre wildlife park with more 35,000 visitors/year houses 400 exotic animals

• Most on-site drainage controlled by small ponds, vegetated drainage swales, and berms around some pastures

• Some denuded areas present near tributary running through facility and near Dickinson Bayou

Data Near Wildlife Park 2008Data Near Wildlife Park 2008

Constituent 11466 11467DO (mg/L) 8.7 9.5

Salinity (ppt) 0.25 0.25

TSS (mg/L) 33.5 42.1

TKN (mg/L) 12.9 15.6

Total P (mg/l) 0.43 0.33

E. coli (MPN/dL) 4,606 1,498Enterococci (MPN/dL) N/A 6.501

dL – deciliter, DO – dissolved oxygen, L – Liter, mg- milligrams, MPN – most probable number, ppt – part per thousand

Wildlife Park Wet/Dry Data 2008Wildlife Park Wet/Dry Data 2008

Station 11467Station 11467

Station 11466Station 11466

n = 7n = 7 n = 3n = 3

n = 7, 2n = 7, 2 n = 3,1n = 3,1

WWTP LocationsWWTP Locations

WWTP Data 2008WWTP Data 2008

Plant/LocationE. coli

(MPN/ 100ml)TSS

(mg/L)NH3

(mg/L)

Ortho- Phosphate

(mg/L)

Galveston County WCID 1Upstream 34 10.3 <0.1 0.3Downstream 74 11.8 <0.1 0.6

Pine ColonyEffluent 155,310-241,920 <1 - 53 1.4 - 6.7 2.1 - 4.1Downstream 866 36 <0.1 0.245

MeadowlandsEffluent >241,920 2.5 6.5 6.24

dL – deciliter, L – Liter, mg- milligrams, MPN – most probable number