Onsite Sewage. Water Quality, Will Merrell

Transcription

1 Onsite Sewage Facilities (OSSFs), Water Quality, and Mapping Will Merrell

2 What is an OSSF? Future Endeavors: 319 Grant 2

3 E. coli: The Indicator Bacteria Introduction: Critical Need Standard: 126 CFU/100 ml Indicator for Pathogens Protozoa: Giardia, Cryptosporidium Bacteria: Salmonella typhi, Legionella, Shigella, Vibrio cholerae, Vibrio vulnificus Virus: Hepatitis, Polio Acceptable Health Risk 8/1000 Gastrointestinal Illness Failing OSSFs are appreciable source 3

4 Regional Bacteria Impairments and Concerns Pathogens are the Primary Water Quality Issue in the H GAC Region ~70% of Streams Impaired 4

5 History of OSSF Database BIG I Plan Funded d under ARRA Contract 5

6 Sources Addressed Introduction: Critical Need Wastewater ate Treatment e t Facilities Sanitary Sewer Systems Storm Water Systems Onsite SewageFacilities Residential Runoff Illicit Discharges and Dumping Animals and Agriculture 6

7 Preliminary Research Introduction: Critical Need 7

8 Preliminary Research Introduction: Critical Need Estimated 2 Million OSSFs in Texas H GAC Region Estimation: 300,000+ or 15% of all OSSFs 8

9 Preliminary Research In order for a Designated Representative to fulfill the responsibilities of the job, it is importantto to haveaa complete understanding of the number and location of the OSSF systems within his/her jurisdiction. Study to Determine the Magnitude of, and Reasons for, Chronically Malfunctioning OSSFs in Texas, TOWTRC, 2001, p

10 Challenges to Addressing OSSFs Permitted No common source/format of data Different DRs track data at different levels of precision Not all existing i records are electronic Unpermitted/Grandfathered Very little location data Unknown condition Not installed in deference use, soil type, occupancy, climate, etc

11 Collecting Data Contacted AA s MOST Challenging Part of the Project 11

12 Editing Data Phase II: Editing Data Excel Spreadsheets Access Databases Paper Documents Latitude and Longitude Coordinates ArcGIS Shapefile OSSF Database 107,986 Records Received

13 Editing Data Phase II: Editing Data 3555 Timmons Lane, Suite 120 Houston, Texas Street_Num Street_Name Street_Type Unit_Num City State Zip_Code 3555 Timmons Ln Suite 120 Houston Tx 77027

14 Editing Data Phase II: Editing Data 3555 Timmons Lane, Suite 120 Houston, Texas Street_Num Street_Name Street_Type Unit_Num City State Zip_Code 3555 Timmons Ln Suite 120 Houston Tx 77027

15 Editing Data Insufficient Records Phase II: Editing Data ThreeHouses Down fromrosie Three Houses Down? Rosie 15

16 Building the Geo database Phase III: Building the Geodatabase 28% 4% Insufficient ArcGIS Shapefile & Latitude and Longitude Coordinates Street Address Points 15% 37% Parcel ID Centroids 16% Unable to Geocode 16

17 Permitted OSSF Locations 107,986 Records Collected 73,870 Records Identified 34,116 Records Remaining 17

18 Applications: BIG Project Area 18

19 Limitations of Address Matching: Street Network and Parcel ID Centroids Phase II: Editing Data 19

20 Limitations of Address Matching Phase II: Editing Data?????? 20

21 Limitations of Address Matching Phase II: Editing Data 21

22 Implementing GPS Future Endeavors: 319 Grant Precision and Accuracy Eliminating Lost Records Using TCEQ OPP 8.12 Standards Receiver Procurement Training 22

23 GPS Garmin etrex Vista H High Sensitivity GPS Unit 24 MB Internal lstorage USB for Electronic Storage 23

24 GPS H GAC GPS Handhelds D A T A Authorized Agents GPS Training 24

25 GPS Phase II: Editing Data Brazoria, Chambers, Fort Bend, Galveston, Liberty, Montgomery, Walker, Waller, and Wharton currently participating 25

26 GPS Phase II: Editing Data 26

27 H GAC OSSF Database Update 73,870 Permit Locations Originally Identified d 7,994 Added in October ,864 Total in Permits Database 27

28 Unpermitted/Grandfathered OSSFs Analysis to Identify Probable Unpermitted, Grandfathered, and/or Undocumented Residential Septic Systems 28

29 Unpermitted/Grandfathered OSSFs 29

30 Unpermitted/Grandfathered OSSFs 30

31 Unpermitted/Grandfathered OSSFs 31

32 gac.com/go/ossf h / / 32

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37 Tool Bar 37

38 Interactive Tools 38

39 Interactive Tools 39

40 Interactive Tools 40

41 Interactive Tools 41

42 Interactive Tools 42

43 Interactive Tools 43

44 Questions? Will Merrell Environmental Planner Houston Galveston Area Council Phone: (713) gac.com