Municipal Setting Designations in Texas
47K - views

Municipal Setting Designations in Texas

A Case Study of Tarrant & Dallas Counties. CE394K: GIS for Water Resources. Professor David Maidment. Jeni Webb. November 18, 2010. Agenda. Background on HB 3152: Municipal Setting Designation (MSD).

Download Presentation

Municipal Setting Designations in Texas




Download Presentation - The PPT/PDF document "Municipal Setting Designations in Texas" is the property of its rightful owner. Permission is granted to download and print the materials on this web site for personal, non-commercial use only, and to display it on your personal computer provided you do not modify the materials and that you retain all copyright notices contained in the materials. By downloading content from our website, you accept the terms of this agreement.



Presentation on theme: "Municipal Setting Designations in Texas"— Presentation transcript:

Slide1

Municipal Setting Designations in TexasA Case Study of Tarrant & Dallas Counties

CE394K: GIS for Water ResourcesProfessor David MaidmentJeni WebbNovember 18, 2010

Slide2

Agenda

Background on HB 3152: Municipal Setting Designation (MSD)

Literature – what are others saying about this law?

Research question

Methodology + Findings

Future work

Slide3

Slide4

Slide5

Texas VCP provides incentives for property owners to remediate contaminated sitesContaminated groundwater can be very difficult and expensive to cleanCreates conditions where property owners cannot afford to complete the VCP

The TCEQ regulates contaminated groundwater in Texas

http://www.fortworthgov.org/dem/info/default.aspx?id=8040

www.texaobserver.org

Slide6

Works in concert with the Texas VCPAlleviates requirement to remediate contaminated groundwater to potable standardsSaves time & money, but has inherent environmental concernsDesigned to expedite Certificates of Completion

The Municipal Setting Designation (MSD) was passed in 2003

http://www.fortworthgov.org/dem/info/default.aspx?id=8040

Slide7

Over 75% of MSDs lie within the Dallas-Fort Worth MSACase study focuses on Tarrant & Dallas CountiesSome historical land uses led to groundwater contaminationDrinking water comes from surface reservoirs (e.g. Lake Ray Hubbard)

Since 2003, over 130 MSDs have been approved by the TCEQ

http://trtdg.com/wp-content/uploads/2008/07/tx-hillsboro-old-corner-gulf.jpg

Slide8

Literature – what are others saying about this law?

Expedites VCP Certificates of Completion

Saves time & moneyPromotes economic developmentIncreases property valuesExpands the property tax base

Oppose

Violates the “polluter pays” principle upon which CERCLA is foundedIncreases risk of vapor intrusionRisks spreading contamination through groundwater-surface water interactionMSD legislation does not stipulate an end point

Support

Slide9

Research Question: :Using ArcGIS to Examine Spatial Relationships

Can we identify areas of concern where contaminated sites risk polluting water resources?

Slide10

Methodology

Collect raw GIS dataTWDBTCEQNCTCOGArcGIS OnlineUse ArcGIS tools to examine the spatial relationships between MSDs and water resources

Slide11

ArcGIS identifies areas of concern for MSDs

MSDs are based on parcels with a specific addressGeo-coding, or “address matching” represents these addresses spatiallyThe Buffer tool establishes a distance threshold for comparing features (e.g. .5 miles)

Slide12

ArcGIS helps identify sites for future MSDs

The Select by location tool helps examine spatial relationship between water resources and contaminationEnables land use planners to be proactive in identifying potential MSD sites

Slide13

All existing MSDs are less than 200 feet below the ground surfaceWoodbine and Trinity Aquifers are present in the case study area42 wells are within .5 miles of an MSDOf those, none are less than 200 feet below

Findings

Slide14

Findings

http://pubs.usgs.gov/circ/circ1171/html/gw_aquifer_old.htm

Risks contamination

through existing wells

MSD law

does not stipulate an end point

for certificates of completion

Slide15

Geo-code MSD point addresses that have been added since 2007 for inclusion in the studyAdd NHD Flowline for surface water comparisonUse X-Tools Pro to convert the EPA’s Brownfields data from .kmz to .shp for comparison

Future Work

Slide16

Slide17

Slide18

Slide19

Slide20

Slide21

Slide22

Slide23