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Ellsworth Sourcewater Protection Plan December 2004 Rev. September 2005 Page 8 of 63

Uncontrolled Site – NPL Unsewered Subdivision

Underground Injection Site Woodyard, Lumberyard, Pile

A PCS inventory was also performed under the SWPP, the purpose of which was to verify and update the findings from the SWAP. The following sources of information were used in the update: a field reconnaissance of the intake area and along major roads in the watershed, discussions with city officials and stakeholders, tax parcel data from the assessor’s office, aerial photographs and state databases.

A. Summary of PCS Inventory from Maine Drinking Water Program Sourcewater Assessment Drumlin noted that the Branch Lake watershed is largely undeveloped, and that it has

some low-density residential, commercial and herbicides and pesticides are applied to some of

agricultural uses. the agricultural fields

They

found that

in the

watershed.

They also noted the location and character of roads in the watershed. Based on research and field work, Drumlin identified twelve sites within the watershed which

their may

potentially threaten water quality in Branch Lake. categories:

  • 1.

    Woodash spreading site

  • 2.

    Development along the shoreline

  • 3.

    Large unsewered subdivision

The sites fall into these eight

  • 4.

    Engineered subsurface wastewater disposal system

  • 5.

    Leaky underground storage tank

  • 6.

    Above ground storage tank

  • 7.

    Boat launch

  • 8.

    Public swimming beach

A discussion of these PCSs follows in Section C below (Suggested Remedies for Potential Contaminant Sources).

B. Update of PCS Inventory

1. Land Use

The Maine Office of Geographic Information Systems (GIS) generously assisted in this phase of the project by providing geographic databases, technical assistance and

work products. watershed using

They created a data from 1998,

GIS coverage of land as shown in Figure 3.

uses in the Branch According to these

Lake data,

approximately 65% of the watershed is Table 2 is a listing of percent cover gleaned from this coverage.

forested, and

approximately

by land use

in the Branch

1% is

developed.

Lake

watershed,

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