CIM-0900-4F-734-0922-01_FS_AbandonmentSpec.doc

Abandon 10 Wells – White Mountain NF

CIM-0900-4F-734-0922-01

MASTERSPEC Short Form Copyright 1999, The American Institute of Architects (AIA)

SECTION 025251 - WATER SUPPLY WELL ABANDONMENT

PART 1 - GENERAL

1.1 SUMMARY

This Section anticipates the use of allowances for water supply wells. Specify allowances for amounts and quantities in Division 1 Section "Allowances." Make adjustments to allowances based on unit prices after wells with specified capacities are built.

A. This Section includes the following:

Adjust list below to suit Project.

1.

Water supply wells Abandonment.

Insert required capacity below for completed and tested water supply well. The data will be used to determine other variable information such as diameters of bore, casing, and screen, and will affect allowances and unit prices if used.

1.2 DEFINITIONS

See the Evaluations in Division 1 Section "Allowances" for discussion of allowances and how to include them in Project. Coordinate requirements in this Article with Division 1 Section "Allowances."

A. Water Well Abandonment Includes abandoning existing well, appurtenances, including pump, piping, casing to 2’ below ground surface and concrete slab.

Delete first paragraph below if well pump is part of well allowance specified in "Water Supply Well Depth Allowance" Paragraph above.

Unit prices are useful when nature of the Work is well defined but extent or quantity of Work is not known or is likely to change. Provide space on the Bid Form for bidders to propose unit-price amounts. Transcribe unit-price amounts from the Bid Form to the Form of Agreement. Coordinate general measurement and payment requirements in Division 1 Section "Unit Prices." Retain this Article for specific measurement and payment requirements for unit prices for installed water supply wells or for adjustment to quantity allowances.

Coordinate units (e.g., feet or meters) and what is included in units (e.g., water supply well, casing, and grout) stipulated in the Form of Agreement with those described below. Delete grout if rotary or reverse-rotary drilling method is not used.

1.3 SUBMITTALS

A. The Contractor shall provide the following:

1.

Well Abandonment Log.

2.

Abandoned well GPS location to horizontal accuracy of 50’.

3.

Digital picture of abandoned well site, before and after.

See Editing Instruction No. 1 in the Evaluations for cautions about naming manufacturers and products.

Coordinate subparagraphs retained below with subparagraph titles retained in other Part 2 articles. See Division 1 Section "Product Requirements."

Select one of two paragraphs below. Authorities having jurisdiction may require or allow other materials.

Select one of first two paragraphs below. These specialties are designed for use with jet, line-shaft, and submersible pumps. Pitless adapter is installed in casing. Pitless unit replaces a portion of casing.

Retain "Available" in first paragraph below for nonproprietary and delete "Available" for semiproprietary specifications.

For shallow wells, 25 feet (8 m) deep or less, retain subparagraph above. For deep wells, retain subparagraph below.

Delete first subparagraph below if tanks are specified in Division 15 Section "Potable-Water Storage Tanks."

Retain "Water Piping" Subparagraph and associated subparagraph above or below.

Retain "Available" in paragraph below for nonproprietary and delete "Available" for semiproprietary specifications.

Delete paragraph below if no data are available from Owner.

Delete below if no data are available from neighborhood wells.

Retain subparagraph below for steel casings.

Retain subparagraph below for ABS and PVC casings. Do not use ABS pipe for wells deeper than 100 feet (30 m).

Delete first paragraph below if not required.

Retain paragraph below if jet pumps are selected and well is less than 25 feet (8 m) deep.

Retain paragraph below if jet pumps are required and well is between 25 and 100 feet (8 and 30 m) deep.

Retain first paragraph and subparagraphs below if line-shaft- or submersible-type well pumps are selected.

Retain below for submersible-type well pumps.

1.4 WELL ABANDONMENT

A. Comply with AWWA A100 when abandoning water supply wells. Fill and seal holes and casings, remove casing to 24” below ground level, remove any items in the well, any well slab, and restore ground surface to finished grade.

Retain paragraph above or below.

B. Follow well-abandonment regulation of the EPA and the State Agency responsible. Restore ground surface to finished grade.

PART 2 - PRODUCTS (Not Applicable) See Editing Instruction No. 1 in the Evaluations for cautions about naming manufacturers and products.

Coordinate subparagraphs retained below with subparagraph titles retained in other Part 2 articles. See Division 1 Section "Product Requirements."

Select one of two paragraphs below. Authorities having jurisdiction may require or allow other materials.

Select one of first two paragraphs below. These specialties are designed for use with jet, line-shaft, and submersible pumps. Pitless adapter is installed in casing. Pitless unit replaces a portion of casing.

Submersible pump below may be used for any depth.

Retain subparagraph above or subparagraph and associated subparagraph below.

Retain three subparagraphs below with paragraph above.

Retain "Available" in first paragraph below for nonproprietary and delete "Available" for semiproprietary specifications.

For shallow wells, 25 feet (8 m) deep or less, retain subparagraph above. For deep wells, retain subparagraph below.

Delete first subparagraph below if tanks are specified in Division 15 Section "Potable-Water Storage Tanks."

Retain "Water Piping" Subparagraph and associated subparagraph above or below.

Retain "Available" in paragraph below for nonproprietary and delete "Available" for semiproprietary specifications.

Submersible pump below may be used for any depth.

Retain subparagraph above or subparagraph and associated subparagraph below.

PART 3 - EXECUTION

3.1 PREPARATION

Delete paragraph below if no data are available from Owner.

Delete below if no data are available from neighborhood wells.

A. All wells are accessible by vehicle, except for No. 8 at the Androscoggin Office. Vehicle accessibility is limited or impossible in the winter months as the campgrounds are not maintained or plowed for access.

B. Well Data, Location, depth and size of casing:

Retain subparagraph below for steel casings.

Retain subparagraph below for ABS and PVC casings. Do not use ABS pipe for wells deeper than 100 feet (30 m).

Delete first paragraph below if not required.

Retain paragraph below if jet pumps are selected and well is less than 25 feet (8 m) deep.

Retain paragraph below if jet pumps are required and well is between 25 and 100 feet (8 and 30 m) deep.

Retain first paragraph and subparagraphs below if line-shaft- or submersible-type well pumps are selected.

Retain below for submersible-type well pumps.

Coordinate piping installations and specialty arrangements with schematics on Drawings and with requirements specified in Division 2 Section "Water Distribution." If Drawings are explicit enough, these requirements may be reduced or omitted.

If no well house is required, retain subparagraph below and select one of two options.

If well house is required, retain subparagraph below.

Retain paragraph above or below.

Revise test procedures in this Article to suit Project.

Revise maximum time intervals and minimum duration of pumping tests in first subparagraph below to suit Project.

Retain paragraph above or below. Retain below to suit requirements of authorities having jurisdiction.

Revise or delete below to suit Project.

3.2 ABANDONMENT

A. Abandon well as per AWWA100 as per NHDES We 604 and EPA requirements.

B. Remove any appurtenances on or in the well. Existing hand pumps shall be salvaged and returned to the Forest Service. Other appurtenances shall be disposed of by the contractor.

C. Remove and dispose of well slab, if present.

D. Remove and dispose of well casing to a minimum of 2’ below ground surface.

E. Dispose of all materials at a recycling center or a legal land fill.

Retain first paragraph below only if rotary drilling method is selected.

F. Furnish well abandonment log, GPS location of abandonment and a digital picture of the abandoned well site.

END OF SECTION 025251

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