DRAFT

WORK PLAN FOR

ROCKY MOUNTAIN ARSENAL

OFF-POST WELL CLOSURE

PREPARED FOR:

RMA-CBDCOM

PREPARED BY:

LATA/AG&M TEAM

ARCADIS GERAGHTY&MILLER

3603-1/1-A

00011312
Contents

Section Page

1. W ell Closure and Abandonm ent Plan ...............................................

I

1.0 Background ............................................................1

2.0 Purpose and Scope ........................................................I

3.0 Field W ork Plan .........................................................

I

I I Site Reconnaissance ...................................................

1 1. 1 Potential Property Dam age Assessm ent ..................................

I

33.1.2 Utility Clearance .................................................

3)

3.2 Site Preparation ......................................................

4

3.2.1 W ell Preparation .................................................4

-3 ) Video Logging ......................................................

5

)..).I W ell Preparation .................................................

5

.)..).2 Logging M ethods and Procedures .....................................5

.3.3.3 Docum entation and Reporting ........................................

6

)..).4 Decontam ination .................................................

7

3.4 W ell Closure ........................................................7

33.4.1 Equipm ent and Procedures ..........................................

7

n.).4.2 Docum entation ..................................................8

4.3 Decontam ination .................................................

9

3.5 Drilling Plan for Placem ent W ells ..........................................9

3.).5.1 Equipm ent and Procedures ..........................................

9

5.2 Docum entation ..................................................10

-3 .5.3 Decontam ination .................................................

10

3.6 Site Repair/Restoration .................................................I I
Contents (continued)

Section Page

11. Q uality A ssurance Project Plan ........................................................

12

1.0 Background .................................................................12

2.0 Review and Oversight ..........................................................12

2.1 CPG Review and A pproval ..................................................12

2.2 Inform al A udits ...........................................................

13

.3.0 Quality Assurance/Quality Control (QA/QC) of Measurements .............................

13

4.0 D ocum entation ...............................................................

16

111. W aste M anagem ent and D isposal Plan ..................................................20

IV . Health and Safety Plan ..............................................................

Bound Separately

iii
THE LATAIARCADIS GERAGHTY& MILLER TEAM DRAFT

1. WELL CLOSURE AND ABANDONMENT PLAN

1.0 Background

The Los Alamos Technical Associates (LATA)/Arcadis Geraghty and Miller (AG&M) Team

will perform closure and abandonment of seven (7) off-post wells at Rocky Mountain Arsenal. as

described in the 22 May 1998 Statement of Work (SOW). This work will be performed under

delivery order (DO) 0002 of contract #DAAM02-97-D-0007, issued by RMA on 21 July 1998.

The anticipated start-date for the field effort is I August 1998, with completion of work by 3 )I

October 1998. Project organization. responsibilities. and schedule are presented in the Task

Order Management Plan (TOMP) for this effort. The Health and Safety Plan for the well closure

program was prepared as a stand-alone document, and will be reviewed and signed by all

workers at the field sites.

2.0 Purpose and Scope

Under the Record of Decision (ROD) for the Off-Post Operable Unit at RMA. criteria were set

for abandonment of wells in the Off-Post Studv Area. The scope of this effort is abandonment of

se-..,en off-post wells. Six of the wells are completed in the confined aquifer and need to be

abandoned to prevent migration of contaminants from the alluvial system to the underlying

confined aquifer through the well bore. The other well is completed in the alluvial aquifer and

will be abandoned by backfilling/plugging. Locations of the seven (7) wells scheduled for

closure are shown in Appendix A of the SOW.

3.0 Field Work Plan

The following sections describe field activities associated with the off-post well closure. Table I

summarizes known information about the off-post wells. including casing diameters, completion

depths. and locations.

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Table 1. Sunimary of Kitowit Well hiforiiialioiz

(D

co

0 Well ID Coordinates (E/N) Depth (ft) Borehole Diameter (in) Casing Diameter (in) Casing Type Completed Aquifer

395A 2186226/202174 Unknown (300 Unknown Unknown Unknown Unknown

reported by owner) M

0 2

Q 914A 2184647/208503 480 6 4 Plastic Confined

Q Z25 985A 2172683/203575 315 7 at 0-20 ft 6 at 0-20 ft Steel 0-270 Confined Q ZD- 6 at 20-270 ft 4.5 at 0-270 ft Open 270-315 rn

co

4.5 at 270-315 ft hole at 270-315 ft

299A 2174790/201192 290 7 7/8 at 0-92 ft 6 5/8 at 0-92 ft Steel Confined

6 at 92-290 ft 4.5 at 76-290

1070A 2171616/201662 Unknown Unknown Unknown Unknown Confined A

(suspected 200)

37304 2182183/197232 25 4 2 PVC Unconfined

37319 2183504/197609 1715 963 2 PVC Confined

;u>

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THE LATAIARCADIS GEPAGHTY & MILLER TEW DRAFT

3.1 Site Reconnaissance

Because the off-post wells scheduled for closure are on private property. site reconnaissance will

be performed to identify and minimize potential property damages. In addition, utility clearance

will be performed prior to any on-site excavation or drilling activities.

3. 1. 1 Potential Property Damage Assessment

The LATA/AG&M Team will perform a detailed site analysis prior to beginning field work.

The intent of this effort is to identify all potential damages to property that may result from well

abandonment activities and/or construction of new wells. The features evaluated will include:

" Potential damage to landscaping (i.e.. lawns, trees. shrubs. and gardens)

" Potential driveway damages.

" Potential damage to structures

The LATA/AG&M Team will document site conditions prior to well abandonment by taking

photographs and detailed field notes. Photographs will include landscape features (i.e.. lawns,

trees. and shrubs). condition of drivewa,ý s. and an-Y other features that may potentially be

damaged during site work. These photographs may be compared with conditions following well

abandonment to ascertain the extent of anN property damages. Prior to initiation of well closure

at each location. the LATA/AG&M Team,ývill submit a letter to the Contracting Officer's

Representative (COR) describing our best estimate of dally property damages expected from site

activities.

3.1.2 Utility Clearance

Prior to any intrusive work (i.e.. digging or drilling), local utility companies will be contacted to

provide site clearance. Utilivy clearances A ill be performed for telephone. electrical, water, and

natural gas line. and will be coordinated through the Utility Notification Center of Colorado

(T-JNCC). Utilit-, companies "ill be responsible for marking locations of underground utilities in

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the areas. If any underground utility lines not located by a utility company are inadvertently

encountered during excavation, the COR will be notified and the utility line left in place until the

appropriate utility company has been notified.

3.2 Site Preparation

Following submittal of the letter estimating property damages. and prior to commencement of

well-closure activities, the well sites will be prepared for closure. Required site preparation

activities vary by location, and are summarized in Table 2.

Table 2. Site Preparation Requirements

Well ID Site Preparation Activities

Well 395A e Remove roof from well pit to provide access.

0 Disconnect wiring from well pump.

9 Shut down power to line over the well (residents may be temporadly relocated to hotels)

0 The owner will clean all of the debris out of the vault prior to the site work.

Well 914A * Disconnect wiring from well pump.

0 Remove small cottonwood tree adjacent to well

Well 985A e Disconnect wiring from well pump

Well 299A e Disconnect wiring from well pump

* Excavate an area around the well-head casing.

0 Remove four bump posts in the area (cut at ground level)

0 Owner will remove building supply materials from vicinity of the well

0 Owner will relocate the "break area" for workers at Hugh M Woods to an area outside

exclusion zone

Well 1070A e Disconnect wiring from well pump

0 Remove roof from well pit to provide access.

* Protect 2" copper water line or reroute around the well pit.

a Possibly need to trim branches from a neighbor's tree.

Well 37304 9 No site preparation required

Well 37319 * No site preparation required

3.2.1 Well Preparation

Following preparation of the areas surrounding the wells. each well will need to be prepared for

abandonment. This work will include:

" Opening/excavation of sumps and vaults. as required.

" Disconnection of NAiring from the well pumps by a licensed electrician.

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" Removal of pumps and related equipment from the wells

" Removal of stick-up and surface casings.

These activities will allow access to the wells for subsequent video-camera logging and well

closure.

3.3 Video Logging

In order to evaluate the construction and condition of the five off-post water supply wells,

downhole video camera surveys will be performed. These surveys will be performed prior to

well closure, including the wells with known construction. This is to provide documentation and

verification of well construction prior to closure. Video surveys will not be required for the two

monitoring wells Q 7304 and 3 73 19) because well construction has been documented, and they

'11 be abandoned by backfilling/plugging.

3.3.1 Well Preparation

In order for downhole video logging to be effective, water within the wells must be relatively

clear. In actively pumping wells. water will tend to contain suspended sediments that may limit

visibility with a downhole camera. Because the wells scheduled for closure have not recently

been in use. we anticipate that the water will be clear enough for video logging. However, if the

water is initially too cloudy for video logging. we may inject potable water into the well with a

hose. The well will then be allowed to stand undisturbed for 24 - 48 hours until the water settles,

and video logging will again be performed.

3.3.2 Logging Methods and Procedures

Because of the requirement for clarity in the water column, wells will be logged downward (i.e.,

from surface to bottom). In this waý. sediments will not be disturbed prior to logging. If water

clarity is not sufficient for evaluation of well construction using the downhole video tool, the

COR will be notified and alternatives evaluated. Alternatives may include use of additional

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borehole tools (such as cement-bond logs. collar locators, and resistivity logs) or abandonment of

the well(s) by casing removal.

Two different downhole cameras may be used; one 6" diameter tool with side-view capabilities.

and one 2" diameter tool with a downward looking wide-angle lens. Both downhole video

cameras have self-contained light sources. The downhole video tools will be connected to a

video recorder and a spool that automatically records depth in the borehole. A marker on the

instrument cable will be used to evaluate the precision of depth measurements. The marker will

be aligned with a specific point on the casing and depth recorded as zero. When the tool is

returned to the surface. the alignment of this mark to the point on the casing will be compared

with the automated depth reading when the video tool is returned to the surface. Requirements

for measurement precision are described in Section Il of this document (Quality Assurance

Project Plan).

In addition to water clarity. the downhole video-logging tool will require unrestricted access to

the entire well (surface through screened interval). If the well casing is compromised (i.e., bent

or constricted) such that the borehole video tool can not access the entire well depth. this

information will be provided to the COR. and alternate well closure methods (up to and

including casing removal) x), ill be evaluated.

3.3.3 Documentation and Reporting

Measurement locations. depths. and other pertinent information will be recorded by the Field

Team Leader in a field logbook. Video records will be recorded on VCR tapes. and copies of the

tapes will be submitted to the COR. An-, deviations from this Work Plan will be noted and

reported to the COR. Situations that impede the ability to effectively log any well will be

reported to the COR. and revised approaches for logging and/or well closure will be evaluated.

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3.3.4 Decontamination

The downhole video tools, cables, and any other equipment that comes into contact with water in

the wells will be decontaminated at the RMA on-post CERCLA decontamination facility prior to

deployment to the next well. Prior to leaving the well site, visible dirt and other materials will be

removed with a brush. The equipment will then be rinsed at the decontamination station prior to

entry into the decontamination line. Decontamination will conform to existing RMA-RVO plans

and procedures.

3.4 Well Closure

The following sections describe well-closure procedures anticipated to complete the SOW. Two

wells (37304 and 37319) will be abandoned by backfilling/plugging. Under this Work Plan, we

assume that the remaining five wells will be closed using the perforation/grouting method.

However. this closure method may be contingent upon our ability to document well construction

usino the do,ýý,nhole video tools. If well construction can not be determined, other methods, up to

and including casing removal. will be evaluated. In this event, the COR will be notified and

v,ell-closure will be delaved until a decision is reached on the closure method. At this time. the

Work Plan "ill be revised to reflect the ne,,N closure method and related equipment and

procedures.

3.4.1 Equipment and Procedures

Wells 37304 and 373 19 will be abandoned bv back fi Ili n-/pI ugging from total depth to the

surface. They will be backfilled with a mixture of portland cement. bentonite. and water. Grout

will be emplaced from the bottom up using a grout pump and tremie pipe. The amount of grout

placed in the well will be compared with calculated borehole volume to ensure that no void

spaces are present.

Closure of the remaininQ five wells will include casing perforation and grouting. Perforation

will be performed using a Holte Star-Wheel Perforator. This tool can perforate casings from 4"

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to 12" in diameter, and is powered pneumatically (by pressurized air). This tool is deployed

down the well, activated, and pulled upward through the well casing. It creates 0. 1 " perforations

at a density of 10 perforations per foot around the circumference of the casing. Where casing

diameter increases, the tool will be adjusted as required to ensure perforation of the entire well

casing. The casings will be perforated from the top of the screened interval to the surface.

Sealing off of the contaminated alluvial aquifer from the underlying Arapahoe Formation will

then be accomplished by placing clean sand across the screened interval, and grouting the entire

length of the well casing. This methods exceed the requirements of the Colorado Water Well

Rules which only require casing perforation and grouting across a minimum of 20 feet at the

confining layer boundary. Following perforation, the well will be grouted from total-depth to the

surface. The grout will be composed of a mixture of portland cement, bentonite, and water.

Quantities and ratios of these constituents will be recorded in both a field logbook and on well

closure forms. Grout will be pumped into the well using an injection pump and tremie pipe.

When the well is completely grouted. the volume of grout will be compared with the calculated

casiniz volume to ensure that no void spaces are present. Casing-volume calculation methods

and the acceptable difference between grout volume and calculated borehole volume are

presented in Section Il (QAPP).

3.4.2 Documentation

Information will be recorded b-N, the Field Team Leader on both well abandonment forms and in

the field locybook. This will include. but not be limited to site location, date, depth-to-water. well

construction information. grout composition. calculated borehole volumes, and volume of grout

placed in the wells. All field notes and forms will be reviewed by the Technical Lead prior to

submittal to the COR. Examples of well abandonment records. and a State of Colorado well

closure form are presented in Appendix A.

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3.4.3 Decontamination

Tremie pipes, perforating tools. trucks, drill rigs, and any other equipment that comes into

contact with water in the wells will be decontaminated at the RMA on-post CERCLA

Wastewater Treatment Plant/Decontamination Facility prior to deployment to the next well.

Prior to leaving the well site, visible dirt and other materials will be removed with a brush. The

equipment will then be rinsed at the CERCLA decontamination station at RMA prior to entry

into the decontamination line. Decontamination will conform to existing RMA-RVO plans and

procedures.

3.5 Drilling Plan for Replacement Wells

Replacement wells will be constructed for abandoned wells 1070A and 914 A in accordance with

the requirements of the SOW. Construction materials. methods, and documentation will be in

compliance NYith Colorado Water Well Rules (WWR). These wells will be constructed in a

manner that ensures no conduit exists for contaminants to migrate from the alluvial to confined

aquifer. The replacement wells will be used by the property owners for irrigation. Prior to

drilling the replacement wells. required pennits will be obtained from the Colorado State

Enuineer's Office. Wells xkill be constructed in accordance with the requirements of the

Colorado Water Well Construction Rules (2 CCR 402-2).

3.5.1 Equipment and Procedures

The replacement wells will be drilled in locations accessible to drill rigs, and agreed upon by the

property owners. The replacement Aells %kill be a sufficient distance from the closed wells to

ensure that the boreholes do not intersect and no grout contamination extends from the

abandonedwell to the replacement well.

If possible. the replacement výells will be drilled using the air-rotar method. However. if loose

materials cause the borehole to collapse during drilling. mud-rotary may be used to maintain an

open borehole. In this event. drilling mud will be contained. collected. and disposed at RMA per

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the Waste Management and Disposal Plan (Section III). Logging of the borehole will be

performed on the cuttings returned to the surface during drilling.

The borehole diameter will be 8", with a 6" steel surface casing advanced from the surface to the

top of the confining unit (Arapahoe). The contaminated alluvial aquifer will be sealed off from

the confined aquifer in the replacement wells by use of a watertight, steel surface casing that will

extend to the alluvium/confining layer (Arapahoe) interface. The steel casing will be grouted in

place from the base of the casing up using a positive displacement method through a tremie pipe,

as required by the Colorado Water Well Rules. Beneath this, the well will be constructed with a

4" schedule 40 PVC casing inside the 6" borehole. To the extent possible, the replacement wells

will be completed at the same depth and screened interval as the abandoned wells they are

replacing. Well screens will be 0.03 )2" slotted PVC, and the sand pack around the screen will be

composed of Colorado Silica Sand, Inc. (CSSI) 10-20 sand. Well development will be

perfon-ned using a surge-block to flush fine-grained sediments out of the screen followed by

bailinQ to remove these materials from the well Finally. a submersible pump will be used to

pump the well until the extracted water is clear.

3.5.2 Documentation

Replacement well construction will be documented in the field logbook and on field forms. Well

construction diagrams will be prepared showing casing and borehole diameters, depths, screened

inten,al. gravel pack. seal. and grout locations. Well construction diagrams will be reviewed and

the final design approved by the Technical Lead (Certified Professional Geologist). Original

field forms. loobooks. and diagrams will be delivered to the COR.

3.5.3 Decontamination

Tremle pipes. perforating tools. trucks. drill rias. and any other equipment that comes into

contact NA-ith water in the wells will be decontaminated at the RMA on-post CERCLA

decontamination facilitN prior to deployment to the next well. Prior to leaving the well site.

visible dirt and other materials will be removed with a brush. The equipment will then be rinsed

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THE LATAIARCADIS GEPAGHTY & MILLER TFAM DRAFT

at the CERCLA Wastewater Treatment Plant/Decontamination Facility prior to entry into the

decontamination line. Decontamination will conform to existing RMA-RVO plans and

procedures.

3.6 Site RepairlRestoration

Following well abandonment and construction of replacement wells, site repairs will be made to

return the work sites as close as possible to their original condition. Original conditions will be

determined from site photographs and field notes taken prior to well abandonment and

construction.

If heavy equipment creates cracks in concrete driveways, the damaged driveway section will be

replaced. Walls of well vaults will be cut off at approximately I ft below ground surface, and the

vaults will be backfilled/plugged with clean fill material to the original surface grade. All

excavations at the well sites will be returned to original grade. Damages to any buildings,

structures. or fences. although not anticipated. will be repaired. Insulating materials covering

powerlines will be removed, and all rubbish and/or debris will be removed from the site for

appropriate disposal at RMA. as described in the Waste Management and Disposal Plan (Section

111).

Following site repairs/restoration. final conditions at the well sites will be documented with

photographs and detailed field notes. Any issues or concerns raised by residents will be

communicated to the COR so that he can provide guidance on any additional site

repair/restoration activities.

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11. QUALITY ASSURANCE PROJECT PLAN

1.0 Background

This Quality Assurance Project Plan (QAPP) has been prepared to meet the requirements of the

project Statement of Work (SOW) (WBS 1.000. 100. 110. 114) and the requirements of Section

C.6.1.7 of the RMA Technical Support Contract SOW. In accordance with these requirements,

this QAPP provides specific procedures and protocols to achieve quality assurance objectives of

the Off-Post Well Closure project. Because no sampling, chemical analysis, or detailed

hydrologic studies will be performed. detailed discussions of precision. accuracy,

representativeness. completeness. and comparability (PARCC parameters) are not included in

this document. However, a brief discussion of measurement QA/QC is included in Section -3 ).0.

2.0 Review and Oversight

RevieNN and oversight of field activities for the Off-Post Well Closure project will include review

and approval of project documents by a Certified Professional Geologist (CPG), and informal

field audits.

2.1 CPG Review and Approval

Per requirements of the SOW. the LATA/AG&M Team has designated a project Technical

Lead/CPG to revieN&- and approve project documents. The Technical Lead/CPG has overall

responsibility for technical aspects of the program. He will be available to attend biweekly

project meetings. and will guide technical xNork performed by the Team. He will review and

approve the following project documents prior to final submittal to the COR:

" Well abandonment forms

" Well completion forms (neA wells)

" Well construction diagrams (all Neils)

" Measurement data and calculations

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The Technical Lead/CPG will report any identified deficiencies and recommended corrective

actions to the COR.

2.2 Informal Audits

During performance of field work, informal audits will be periodically conducted by the

Technical Lead/CPG and the Task-Order Manager. The purpose of the audits will be to evaluate

compliance with the requirements of this Field Work Plan and the project Health and Safety Plan

(HASP). Any deficiencies noted will be reported to the COR, along with recommended

corrective actions. Informal audits will be performed by the LATA/AG&M Team at a frequency

of at least once per week. Particular attention will be paid to health and safety issues, and

technical requirements for ensuring contaminants do not spread from the alluvial to confined

aquifers. Following each inforinal audit. results will be immediately reported to the COR

verbally. followed by a brief (1-3 pg.) memorandum provided to the COR within 48 hours noting

any deficiencies and corrective actions taken.

3.0 Quality Assurance/Quality Control (QA/QC) of Measurements

The Off-Post Well Closure project does not involve sampling and chemical analysis and,

therefore. few measurements will be taken. Hoxkever. QA/QC for measurement data are briefly

discussed below.

Water-Level Measurements

Water level measurements will be made %N ith a calibrated well sounder to the nearest 0. 1 ft. This

instrument contains a calibrated line " ith a water interface probe that sounds an alarm upon

contact with water. Each water-level measurement will be made twice so that measurement

precision can be calculated bN:

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X, RPD X1 -2- (100)

(Xi + X,) / 2

Where: RPD = Relative percent difference

X, I X2 = Value of measurements I and 2

Acceptable measurement precision will be +/- 5%.

Downhole Video Depth Measurements

The downhole video tools will be connected to a video recorder and a spool that automatically

records depth in the borehole. A marker on the instrument cable will be used to evaluate the

precision of depth measurements. The marker will be aligned with a specific point on the casing

and depth recorded as zero. When the tool is returned to the surface, the alignment of this mark

to the point on the casing will be measured to the nearest 0. 1 ft and compared with the automated

depth reading when the video tool is returned to the surface. RPD will be calculated for the two

measurements. based upon the equation shown in the previous section (Water-Level

Measurements). The acceptable measurement precision will be +/- 5%.

Grout Mixture Measurements

Grout used for well closure and construction of new wells will be composed of a mixture of

bentonite. portland cement. and water. Portland cement and 2% bentonite will be measured to

the nearest 0.5 pound. Water ,vill be measured to the nearest 0.2 gallon. Following mixing,

densitv of the Prout will be calculated bv weichino a measured volume (nearest 0.2 gallons. to

the nearest 0.25 lbs.). Densivy of the grout and mixingratios will be recorded on the well

abandonment field forms. Grout densitv will conform to State of Colorado requirements for well

abandonment.

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Grout Volume

Volume of rout placed in abandoned wells will be compared with the calculated casing volume.

Because the casing will be perforated prior to emplacement of grout, the emplaced volume

should exceed the calculated casing volume.

The equation for calculating casing volume is as follows:

n

1 2 h, ton

Where: r casing radius

length of casing with a given diameter

n number of casing lengths with different diameters

The difference between the calculated and measured volumes will be based upon the following

equation:

PD = V1 (100) V,

Where: PD = percent difference

V I = volume emplaced

V2 = calculated borehole volume.

The percent difference bet,.keen measured grout volume and calculated borehole volume must be

ý:90%. There is no upper bound to thisvalue because the amount of grout entering the well

annulus and formation can not be accurately estimated. and proper closure is ensured regardless

of the magnitude of this value (i.e.. amount over 90%).

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Well Depths

Depths of boreholes, wells. and construction materials in the wells will be measured to the

nearest 0.2 ft. The reference point for these measurements will be a fixed point on the surface

(i.e., in surface casing). For existing wells that will be closed, surface elevations are typically

surveyed to the nearest 0.01 ft. and well construction details will be reported as elevations. New

wells will be referenced to a fixed point on the surface casing, and will be measured as depth

from surface as opposed to elevation.

4.0 Documentation

The project objective is to prevent downward migration of contaminants in the alluvial flow

system to the underlying regional confined flow system via well borings by closing specific

wells located outside of the RMA boundary. To meet this objective, the following data will be

collected:

" Utilitv clearances and Tri-Country Health Department (TCHD) approvals/notifications for

each private property parcel.

" Site analysis and estimate of abandonment impact to property,

" Photographic documentation of well closure area's original condition. closure procedures,

and post closure condition.

" Well construction information. including camera logs,

" Field notebooks:

" Well Data Sheets.

" Records of volumes. containers. and contents of waste to be disposed;

" Permit application.ý for new xA ells: and

" Lithologic logs and construction details for two new replacement wells.

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Utility and TCHD Approvals/Notifi.cations

For each parcel, the LATA/AG&M Team will obtain written information from the LNCC, along

with marked locations of buried utilities at the field sites.

Estimate of Propertv Damage

Copies of the Field Team Leader's site analysis and memo to the COR regarding property

damage estimates will be maintained.

Photographic Documentation

The LATA/AG&M Team will document site conditions prior to, during, and after well

abandonment by taking photographs and detailed field notes. Photographs will include

landscape features (i.e., lawns. trees. and shrubs). condition of driveways, and any other features

that may potentially be damaged during site work. Photographs provide the most accurate record

of the field worker's observations. The), can be significant during future inspections, informal

meetings. and hearings. and may be compared with conditions following well abandonment to

ascertain the extent of any property damages. Photographs must be documented to be a valid

representation of an existing situation. Each photograph will be recorded in the Field Team

Leader's lo(ybook and labeled with the following items to document activities at each well

closure area:

" Date and time

" Signature of photographer

" Name and well number for site

" Type of camera. lens. film. and other equipment used (logbook only)

" General direction faced and description of subject

" Distance from photographer to object

" Sequential number of photograph and roll number

rml 02/9802/text doct8/14/98 17

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THE LATA/ARCADIS GERAG14TY & MILLER TEAM DRAFT

Video camera logs will also be maintained and used to record construction details of the wells to

be abandoned. The date. time. and depth below top of casing will automatically be logged oncamera. Before lowering the camera into the well, site workers will record the type of camera

and other equipment used, as well as the name of the camera operator. Collection of video logs

will also be noted in the Field Team Leader's field logbook.

Well Data Sheets

Well construction information other than camera logs will be recorded on well data sheets.

including original well casing and borehole depths and diameters, top of casing and ground

surface. material of construction. screened section length, diameter, and location below ground

surface. depth to water. and type of screen (construction and slot width).

Tv.-o types of well data sheets are required for this project. RNIA well abandonment record

sheets and State of Colorado well closure forms #GWS-9 (Examples presented in Appendix A).

RMA sheets require closure information such as perforation method and depth and sealing

methods and materials. Both of these forms completed for each abandoned well will be

submitted to the COR w ithin 24 hours of closure or by the next business day and to State

Enunneer's Office by the project completion date.

Field Loilbooks

All information related to field actwities xN ill be recorded in a bound loebook with

consecutiveIN -numbered paoes. This loubook vý ill be maintained by the Field Team Leader or

his desianate. If not included on specific data collection forms such as well construction

diaarams. entries in the loubook should include at least the information listed below:

" Date and time of entry:

" Name and address of field contact:

" Site identification (including .ýell number):

" Description of abandonment or drilling processes:

rm102/9802/text doc/8/14/98 18

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THE LATA/ARCADIS GERAGHTY & MILLER TEAM DRAFT

" During drilling. a lithology description with depth interval (from cuttings);

" Field observations of the work area, including a sketch;

" Field measurements such as camera depth or grout mixing ratios and masses;

" Deviations from the work plan or noted anomalies, such as differences in well construction

details; and

" Any uncompleted work.

Logbook maintenance will be assigned to a single individual and records of logbook numbers

kept when more than one logbook is used. If any person other than the Field Team Leader or

designate makes an entry. he/she will sign and date the entry. Logbook pages will not be

removed. If a mistake is made, the author will denote it by drawing a single line through the

mistake. writing the new information above the line. and initialing and dating the change. The

loubook must be siened at the end of each day.

Lou for Ne,.N Wells

Replacement well construction m, ill be documented in the field logbook and on field forms. Well

construction diagrams will be prepared sho,.ý ing, casing and borehole diameters. depths. screened

interval. gravel pack. seal. and grout locations. Formation lithology will also be logged in the

driller's loabook. Well construction diagrams xvill be reviewed and the final design approved by

the Technical Lead (Certified Professional Geologist). Original field forms. logbooks. and

diaszrams xvill be delivered to the COR. The required Well Construction and Test Report will be

delivered to the Colorado State En&,Ineer*s Office b-,,- the close of the project.

rm102/9802/text doc./8/14/98 19

DRAFT
THE LATAIARCADIS GERAGH7Y & MILLER TEAM DRAFT

III. WASTE MANAGEMENT AND DISPOSAL PLAN

All wastes generated during well abandonment and construction activities are considered nonhazardous. as documented by previous water sampling and analytical results. We anticipate

three types of waste generated in this effort:

1. Concrete waste and debris - disposed of at RMA

2. Steel and PVC - disposed of at RMA (steel will be recycled. if possible)

3. Containerized wastes (cuttings. fluids. drilling mud, etc.) - Disposed of at RMA

These waste streams will be segregated as generated at the well sites. Wastes will then be

transported to RMA by the LATA/AG&M Team for disposal or recycling at the appropriate

facilities. in accordance with applicable RMA plans and procedures.

rm 1 02/9802/text doc/8/14/98 20

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THE LATAIARCADIS GERAGHTY& MILLER TEAM DRAFT

Appendix A

Example RMA and State of

Colorado Well Closure Forms

rm102/9802/text doc/B/14/98 21

DRAFT
F 0 R M STATE OF COLORADO Fof Office Use only NO. OFFICE OF THE STATE ENGINEER

Gws-9 818 Centennial Bldg.. 1313 Sherman St., Denver, Colorado 80203 12f95 (3031806-35131

TYPE OR PRINT IN BLACK INK

WELL ABANDONMENT REPORT

(To Report Plugging and Sealing Wells)

PERMIT NUMBER OF PLUGGED WELL

1. INDIVIDUAL/COMPANY RESPONSIBLE FOR PLUGGING

NAME(S)

Mailing Address

City, St. Zip

Phone (-)

2. ACTUAL WELL LOCATION: COUNTY

PROPERTY ADDRESS

(Addrcr_-) (City) (State) (Zip)

- 1/4 1/4, Sec. Twp. ON. [IS., Range E. W P.M.

,es from Section Lines Ft. from 1:1 N. S. Line, Ft. fromE E. or

Distanr OW. Line.

3. 1 (we), report that an existing well was plugged and seated for the following reason(s):

F] The well was plugged and sealed as required under the conditions of

approval of Well Permit No.

[__j 'The well was not in use and was plugged and sealed.

Other (please explain)

4 The well was plugged and sealed according to the Water Well Construction

Rules on '19

5. The well was plugged with the following materials placedat the indicated intervals:

AMOUNT AND TYPE OF MATERIAL METHOD OF PLACEMENT INTERVAL

from feet to feet

f rom feet to feet

from feet to - feet

from feet to -feet

INTERVALS OF CASING RFMOVED/RIPPED IN FEET from teet to feet

ýrom feet to feet

6. 1 (we) have read the statements made herein and know the contents thereof, and that they are true to my (our)

knowledoe. I[Pursuant to Section 24-4-104 (13)(a) C.R.S., the maldrig of false statements herein constitutes pedurN

In the second degree and is punishable a3 a class 1 misdemeanor.)

Name/T-rtle (Please tvpe or print) I Sipriature I Dot

-IMF-ORMATION- It is the responsibility of the well owner to have the well properly plugged and sealed. The Well

Construction Contractor is responsible for notrtying the well owner of the plugginq and sealing requirement.

This form may be reproduced by photocopy or word processino means.
REIVIEDIATION VF-NTURE OFFICE

Well Closure

Well No... 36061 Project CANU/ Basin A Well Abandonment Page of 2

Site Lo.cation: Ro,ky Mountain Arsenal, Basin A, Section 36

Date Started- 6-16-98 Date Completed: 6-19-98

Surveyed Surveyed

Location N Elevation GS* 181251 5258

2185212 E TOC' 52,60.93

Depth of Water (TOCIfOate 21-71f/2-18-98 Casing Depth (GS): 114.6

Drilling Layne - Western Rig lng-ersol Rand TH60

Prepared By: Dallas Werner zda,-ý Date 6-25-98

Well Conraruction HistQry

Original Depth Original Bore

of Well ft. Depth ft.

(GS) 114.6 114.6

Diameter (in.) Too (ft.) Bonom (ft.)

6oreholleCasing-#1: PVC 2 0 100.1

Casing #2:

Screen 91: PVC 2 100.1 107.3

-Cornments:

Umiude c=ýWý Gr wat4cl" "Ibme ZAC wo P.C. if gxo"rm

Closure, Drilling Log

Di,-pth Closure Boring

Drilled (ft.) 115'

Diameter Closure Boring

On.i 8" to 43'. 6.75" from 43-115'

-D rilling Method 8" odex and 6.75" a-I'r rotary tricone

Oeoth of. Water (GS) 21. 7.1' Date 2-18-98

.Sample Taken? Not Applicable SampleVolume 'Not Applicable

Geophysical

Lový 114one

Geophysical Contractor Xor, Applien'bIr

Perforation Method Vor- Applicable

'Perforation Depth (GS) Not Applicable

*GS - Ground Surface **TOC = Top Of Casing
REMEDIATION VENTURE OFFICE

Well Closure

Well Nlo. 36061 Project CAMU I Basin A Well Abandonment Page 2 of 2

Casiýq Rg-,moval

Drilled? Foot!ýQe Ptilled7 Footagg

Protective Casing, Not: Applicable

Casing #1: Not Applicable

Casing #2: Not: Applicable

Screen #1: Not Applicable

SCreen or Casing Left

lzcre!2r; or Diameter Matedil T!2o gf bottorn Qf

Casing find or Type JfLi

Interval #1: Not Applicable

Interval #2.- Not Applicable

Interval #3: Nar- Applicable

Interval #4: Not ApplIcable

Sealing St)ecifics

Mdthod of Sealing Grout Pump and Tremi-e Pipe

Depth Tremie Pipe Placed ft. (GS) 1131 Of I" Steel Pipe Slap Til-

-$.and I RII fInTervall Seal #1 fintervan Soal #2 (Interval)

Matefial: Holnam Portland Type 1-11, 94P bags 0-115'

Sentonite 2Z - 1.88# per bag of Portland

ýGal. %ý/ater/Bag 8-'5 Gallons per bag of Potlana -with 2% :Rýnranitp

(or Est. Grout Density) 14.5f/gallcyn

Comments: Material used:

Zentonite Powder 78.96#

Water - 357 gs!llons

coarse gravel from - 50-115' - water @ Z5' -when Zrouting

(.original backfiU Materlal)