Cherokee County Superfund Site Operable Unit 4 Treece Tar Creek Northwest Tributary Cherokee County Kansas


US EPA
Region 7
Lenexa, Kansas

CHEROKEE COUNTY SUPERFUND SITE
OPERABLE UNIT 4 - TREECE
TAR CREEK - NORTHWEST TRIBUTARY-
CHEROKEE COUNTY, KANSAS

CRAWFORD COUNTY
CHEROKEE COUNTY^

kWaco

LAWTON ROAD

FINAL DESIGN SUBMITTAL - REVISED

MAY 2016
Prepared By:

CDM Federal Programs Corporation

CHEROKEE COUNTY.

KANSAS

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^ HydroGeoLogic, Inc

MISSOURI

OKLAHOMA

ARKANSAS

INDEX OF DRAWINGS

SHEET NO.	DRAWING

G-01	COVER SHEET

G-02	GENERAL NOTES AND LEGEND

G-03	GENERAL SITE PLAN, HAUL ROUTES, AND WATERSHED DELINEATION PLAN

G-04	TEMPORARY HAUL ROAD AND CREEK CROSSING PLAN

G-05	WETLAND SITE PLAN

C-01	EXCAVATION AND RESTORATION PLAN - AREA 1 (TX-12 AND TT-38)

C-02	EXCAVATION PLAN - AREA 2 (TX-33)

C-03	RESTORATION PLAN - AREA 2 (TX-33)

C-04	EXCAVATION PLAN - AREA 3 (TT-1, TC-2, TX-2, TX-47)

C-05	RESTORATION PLAN - AREA 3 (TT-1, TC-2, TX-2, TX-47)

C-06	EXCAVATION PLAN - AREA 4 (TX-7 NORTH)

C-07	RESTORATION PLAN - AREA 4 (TX-7 NORTH)

C-08	NORTHWEST TRIBUTARY - STREAM RESTORATION PLAN 1

C-09	NORTHWEST TRIBUTARY - STREAM RESTORATION PLAN 2

C-10	NORTHWEST TRIBUTARY - STREAM RESTORATION PLAN 3

C-11	NORTHWEST TRIBUTARY - STREAM RESTORATION PLAN 4

CD-01	CIVIL DETAILS 1

CD-02	CIVIL DETAILS 2

CD-03	CIVIL DETAILS 3

CD-04	CIVIL DETAILS 4

CD-05	CIVIL DETAILS 5

U.S. HWY 69/160

Columbus i

CHEROKEE COUNTY
SUPERFUND SITE

TREECE (OU-4)

U.S. HWY 166

KANSAS

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U.S. HWY 166/400

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VICINITY MAP

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FOR EPA USE IN PREPARING
CONTRACT DOCUMENTS

-------
GENERAL NOTES:

(APPLY TO ALL SHEETS UNLESS OTHERWISE NOTED)

1. LOCATIONS OF ALL EXISTING STRUCTURES, SUBSURFACE SOIL OR ROCK CONDITIONS ARE
BASED ON THE BEST AVAILABLE INFORMATION AND NOT WARRANTED TO BE EXACT, NOR IS IT
WARRANTED THAT ALL ARE SHOWN, UTILITIES ARE KNOWN TO BE PRESENT ON THE SITE ALONG
PUBLIC ROADS/EASEMENTS AND DEVELOPED PROPERTIES, CONTRACTOR SHALL VERIFY UTILITY
LOCATIONS PRIOR TO EXCAVATION.

2. THE CONTRACTOR SHALL BECOME SATISFIED AS TO THE CONDITIONS EXISTING WITHIN EACH
AREA, THE TYPE OF EQUIPMENT REQUIRED TO PERFORM THE WORK, AND THE CHARACTER,
QUALITY, AND QUANTITY OF THE SUBSURFACE MATERIALS TO BE ENCOUNTERED INSOFAR AS
THIS INFORMATION IS REASONABLY ASCERTAINABLE FROM AN INSPECTION OF THE SITE, AS WELL
AS INFORMATION PRESENTED BY THE CONTRACT DRAWINGS AND SPECIFICATIONS.

3. THE CONTRACTOR IS RESPONSIBLE FOR LOCATING, INSPECTING, AND PROTECTING ALL
EXISTING SITE IMPROVEMENTS OR STRUCTURES. IT SHALL BE THE CONTRACTOR'S
RESPONSIBILITY TO SATISFY THEMSELVES THAT ALL THE EXISTING SITE IMPROVEMENTS,
WHETHER SHOWN ON THESE CONTRACT DRAWINGS OR NOT, HAVE BEEN PROPERLY LOCATED
AND PROTECTED.

4. THE CONTRACTOR IS RESPONSIBLE FOR ALL PROJECT SAFETY INCLUDING, BUT NOT LIMITED
TO, EXCAVATION, TRAFFIC CONTROL, AND SECURITY.

5. THE U.S. ENVIRONMENTAL PROTECTION AGENCY (EPA) WILL OBTAIN ALL ACCESS AGREEMENTS
NECESSARY TO ACCESS THE PROPERTIES THAT REQUIRE REMEDIATION. THE CONTRACTOR IS
NOT TO PERFORM WORK ON ANY PROPERTIES WITHOUT AN ACCESS AGREEMENT.

6. THE CONTRACTOR SHALL LIMIT THEIR ACTIVITIES TO WITHIN THE WORK AREAS SHOWN ON THE
CONTRACT DRAWINGS. WORK CONDUCTED OUTSIDE OF WORK AREAS, IF REQUIRED, SHALL BE
COORDINATED WITH EPA.

7. THE CONTRACTOR SHALL RESTORE ALL DAMAGED AREAS TO THEIR ORIGINAL CONDITION.

8. THE TERM 'ACCEPTABLE' SHALL MEAN WRITTEN ACCEPTANCE TO BE RECEIVED FROM EPA
BEFORE WORK IS STARTED.

9. ANY DEVIATIONS FROM THE CONTRACT DRAWINGS OR SPECIFICATIONS MUST BE ACCEPTED, IN
WRITING, PRIOR TO THE WORK BEING DONE. ANY DEVIATIONS PERFORMED WITHOUT
ACCEPTANCE WILL NOT BE PAID FOR, AND MAY BE REQUIRED TO BE REDONE AT THE
CONTRACTOR'S EXPENSE.

10. THE CONTRACTOR SHALL HAVE A COPY OF THE CONTRACT DOCUMENTS AT THE WORK SITE
AT ALL TIMES.

11. SEE INDIVIDUAL SHEETS FOR ADDITIONAL ABBREVIATIONS, SYMBOLS, LEGENDS, DETAILS AND
NOTES, IF ANY. NOT ALL 'STANDARD' DETAILS SHOWN MAY BE APPLICABLE TO THIS PROJECT.

12. UNLESS NOTED OTHERWISE, ALL WORK SHOWN IN THESE CONTRACT DOCUMENTS IS NEW
AND TO BE PERFORMED UNDER THIS CONTRACT.

13. THE CONTRACTOR SHALL BE RESPONSIBLE FOR MAINTAINING SITE SECURITY FOR THE
CONTRACTOR'S FACILITIES AND EQUIPMENT WITHIN THE LIMITS OF THE CONTRACT.

14. THE CONTRACTOR SHALL EXERCISE CAUTION WHEN WORKING AROUND MINE SHAFTS AND
SUBSIDENCE PITS, SUBSURFACE VOIDS EXIST IN THE IMMEDIATE AREAS WHERE THE EXCAVATION
AND BACKFILLING ACTIVITIES ARE BEING PERFORMED. THESE VOIDS MAY COLLAPSE OR OPEN AT
ANY TIME. THE CONTRACTOR SHALL SUBMIT A SUBSIDENCE PIT AND MINE SHAFT FILLING PLAN IN
ACCORDANCE WITH SECTIONS 02111 AND 02220.

15. THE SIDES OF THE VERTICAL OPENINGS AND SUBSIDENCES MAY BE EXTREMELY UNSTABLE.
EXTREME CAUTION SHOULD BE USED WHEN WORKING AROUND ALL WORK AREAS TO PREVENT
PERSONNEL AND/OR EQUIPMENT FROM FALLING INTO THE HOLES. THE CONTRACTOR IS SOLELY
RESPONSIBLE FOR WORKING SAFELY AT ALL AREAS OF THE SITE. THE CONTRACTING OFFICER'S
REPRESENTATIVE WILL STOP WORK IF THE CONTRACTOR IS NOT FOLLOWING GENERAL SAFETY
PRACTICES.

16. EXCAVATION AND BACKFILL ACTIVITIES SHALL BE PERFORMED IN ACCORDANCE WITH THE
REQUIREMENTS OF THE PERFORMANCE WORK STATEMENT, SPECIFICATIONS, AND THE
CONTRACTOR'S APPROVED SITE HEALTH AND SAFETY PLAN. APPROPRIATE HEALTH AND SAFETY
MEASURES AND TRAINING WILL BE REQUIRED AT ALL WORK LOCATIONS.

17. THE TERM 'MINE WASTE' SHALL MEAN CHAT, TAILINGS, AND CONTAMINATED SOIL WITH METALS
CONCENTRATIONS EXCEEDING CLEANUP GOALS SPECIFIED IN THE PERFORMANCE WORK
STATEMENT.

18. COORDINATES USED ON CONTRACT DRAWINGS ARE NAD-83 (CORS 96) KANSAS STATE PLANE,
ZONE 1502 KANSAS SOUTH IN U.S. SURVEY FEET. VERTICAL DATUM IS MEAN SEA LEVEL NAVD
1938.

19. SITE TOPOGRAPHIC SURVEY AND AERIAL PHOTOGRAPHY PERFORMED BY AERIAL DATA
SERVICES, APRIL 2013. THE FLIGHT HEIGHT OF THE AERIAL PHYOTOGRAPHY WAS 2,000 FEET
ABOVE MEAN TERRAIN ELEVATION. NO PERMANENT BENCH MARKS OR REFERENCE POINTS WERE
ESTABLISHED FOR THE SITE TOPOGRAPHIC SURVEYS.

LEGEND

NOTE: IN GENERAL, EXISTING FEATURES ARE GREY AND NEW OR
IMPORTANT FEATURES ARE BLACK. HATCHED AREAS ARE GENERALLY
GREY FOR CLARITY.

-X—X—X- EXISTING FENCE

CZD

OE-

OP-

EXISTING TREES AND/OR SHRUBS

EXISTING TOPOGRAPHIC CONTOUR
(1 FOOT INTERVALS)

EXISTING DRAINAGE
EXISTING BUILDING
OVERHEAD ELECTRIC
OVERHEAD PHONE
VENT PIPE

MINE SHAFT

+
~

SITE AND EXCAVATION PLAN NOTES:

(REFER TO SPECIFICATIONS FOR ADDITIONAL INFORMATION)

1. IMPLEMENT AND MAINTAIN SEDIMENT AND EROSION CONTROL MEASURES IN
ACCORDANCE WITH SECTION 02910.

2. CLEARING AND GRUBBING SHALL BE CONDUCTED AS SPECIFIED IN SECTION 02230
WITHIN THE LIMITS OF CONSTRUCTION. TREE AND PLANT PROTECTION DURING
CLEARING AND GRUBBING SHALL BE CONDUCTED IN ACCORDANCE WITH SECTION
02230.

3. VEGETATIVE DEBRIS FROM CLEARING AND GRUBBING SHALL BE DISPOSED IN
ACCORDANCE WITH SECTION 02230. OPEN BURNING SHALL BE CONDUCTED IN
ACCORDANCE WITH SECTION 02121.

4. DISPOSE OF MISCELLANEOUS DEBRIS OFFSITE IN ACCORDANCE WITH SECTION
02121.

5. INITIAL CONSTRUCTION LIMITS SHOWN ON THE DRAWINGS ARE FOR ESTIMATING
PURPOSES ONLY. THE CONSTRUCTION LIMITS MAY BE MODIFIED BY EPA IF WASTE
MATERIALS OR CONTAMINATED SOIL IS FOUND BEYOND THE INITIAL LIMITS.

6. IN GENERAL, CONCRETE MILL WORKS STRUCTURES SHALL NOT BE REMOVED
UNLESS INDICATED ON THE CONTRACT DRAWINGS.

7. EXCAVATION SHALL PROCEED AS SPECIFIED IN SECTION 02111. MAINTAIN EXISTING
DRAINAGE PATTERNS DURING CONSTRUCTION.

8. CONFIRMATORY SAMPLING SHALL BE CONDUCTED BY THE CONTRACTOR IN
ACCORDANCE WITH SECTION 02111.

9. RESTORATION ACTIVITIES, INCLUDING BACKFILLING, SHALL NOT COMMENCE
WITHOUT APPROVAL BY EPA.

10. THE CONTRACTOR SHALL EXCAVATE AROUND TREES AND BUSHES TO BE LEFT IN
PLACE UNLESS OTHERWISE SPECIFIED, IN ACCORDANCE WITH SECTIONS 01490 AND
02111. THE EXCLUSION RADII FOR TREES AND BUSHES LEFT IN PLACE ARE SPECIFIED
IN SECTION 02111.

11. OVEREXCAVATION OF UNIMPACTED SOIL WITHIN THE MINE EXCAVATION AREAS TO
GENERATE COVER MATERIALS FOR THE CONSOLIDATION AREAS IS STRICTLY
PROHIBITED EXCEPT FOR AREAS NOTED ON THE DRAWINGS.

12. THE NORTHWEST TRIBUTARY OF TAR CREEK EXTENDING FROM THE LARGE POOL
OF WATER EAST OF AREA 2 TO STAR ROAD WILL BE REMEDIATED UNDER THIS
CONTRACT. THE TRIBUTARY IS CLASSIFIED AS AN EPHEMERAL STREAM
CHARACTERIZED BY A RELATIVELY NARROW INCISED CHANNEL WITH STEEP BANKS
AND STANDING WATER ALONG MOST OF ITS LENGTH. CHAT AND OTHER TYPES OF
MINE WASTE ARE VISIBLE ALONG THE BOTTOM OF THE CHANNEL DUE TO RUNOFF
FROM THE SURROUNDING MINE WASTE AREAS.

13. REMEDIATION OF THE CREEK CHANNEL AND SURROUNDING AREA(S) WILL BE
PERFORMED BASED ON THE CONTRACT REQUIREMENTS AND THE CONTRACTOR'S
NORTHWEST TRIBUTARY RESTORATION PLAN AS APPROVED BY EPA. REFER TO THE
PERFORMANCE WORK STATEMENT FOR SPECIFIC REQUIREMENTS FOR THIS PLAN.

14. IN GENERAL, THE REMEDIATION CONCEPTS FOR THE NORTHWEST TRIBUTARY OF
TAR CREEK INCLUDE REMOVAL OF 18 INCHES OF EXISTING MINE WASTE AND SOIL
BENEATH THE EXISTING CHANNEL BOTTOM AND DISPOSAL OF THE EXCAVATED
MATERIALS WITHIN THE DESIGNATED WASTE CONSOLIDATION AREAS. WHERE THE
DEPTH OF EXISTING MINE WASTE IS GREATER THAN 18 INCHES, THE DEPTH OF
EXCAVATION SHALL BE INCREASED TO REMOVE THE VISIBLE MINE WASTE.
REMEDIATION OF IMPACTED SOIL WITHIN THE FLOODPLAIN ADJACENT TO THE CREEK
CHANNEL SHALL BE BASED ON EXCAVATION TO ATTAIN THE SOIL REMEDIATION
STANDARDS PROVIDED IN THE PERFORMANCE WORK STATEMENT.

15. THE DEPTH OF EXCAVATION BENEATH EXISTING BRIDGES ALONG THE EXISTING
CHANNEL SHALL BE LIMITED TO REMOVAL OF VISIBLE MINE WASTE TO PREVENT
UNDERCUTTING AND INSTABILITY OF EXISTING FOUNDATIONS. REFER TO THE
PERFORMANCE WORK STATEMENT FOR ADDITIONAL INFORMATION. WORK IN THE
VICINITY OF THE EXISTING BRIDGES SHALL BE COORDINATED WITH EPA PRIOR TO
START OF EXCAVATION TO ALLOW DIRECT OBSERVATION OF EXPOSED BRIDGE
ABUTMENT CONDITIONS DURING EXCAVATION.

LOCATION CODE

MINE WASTE CODE

STRAW BALES

DESCRIPTION

MINE WASTE AREA WITHIN TREECE OPERABLE UNIT

DESCRIPTION
CHAT

FLOTATION TAILINGS

EXCAVATED CHAT OR MILL-RELATED DISTURBANCE
OUTWASH TAILINGS

SOIL EROSION AND SEDIMENT CONTROL NOTES:

(REFER TO SPECIFICATIONS FOR ADDITIONAL INFORMATION)

1. THE CONTRACTOR SHALL INSTALL THE APPROPRIATE EROSION AND SEDIMENT
CONTROLS PRIOR TO COMMENCING CONSTRUCTION ACTIVITIES. THE EROSION
CONTROL PRACTICES AND STRUCTURES SHALL BE APPROVED PRIOR TO
IMPLEMENTATION IN ACCORDANCE WITH SECTION 02910. EROSION AND SEDIMENT
CONTROLS SHALL BE MAINTAINED IN ACCORDANCE WITH SECTION 02910 DURING
CONSTRUCTION.

2. THE CONTRACTOR SHALL BE RESPONSIBLE FOR INSTALLING ANY AND ALL
TEMPORARY SOIL EROSION AND SEDIMENT CONTROL MEASURES DEEMED
NECESSARY DURING THE COURSE OF CONSTRUCTION.

3. SILT FENCING, STRAW BALES, DRAINAGE DITCHES, AND TEMPORARY DRAINAGE
SWALES SHOWN ON THE CONTRACT DRAWINGS SHALL BE CONSTRUCTED AS SHOWN
ON SHEET CD-01 AND AS SPECIFIED IN SECTION 02910.

4. TEMPORARY PROJECT SAFETY FENCING SHALL BE CONSTRUCTED AROUND WORK
AREA(S) AS DIRECTED BY EPA AND AS SPECIFIED IN THE PERFORMANCE WORK
STATEMENT.

5. EROSION AND SEDIMENT CONTROLS SHALL BE REMOVED UPON ACCEPTANCE OF
VEGETATION AS SPECIFIED IN SECTION 02921.

GRADING AND RESTORATION PLAN NOTES:

(REFER TO SPECIFICATIONS FOR ADDITIONAL INFORMATION)

1. RESTORATION SHALL BEGIN ONLY AFTER CLEANUP GOALS IN AN EXCAVATION
AREA HAVE BEEN ACHIEVED AS SPECIFIED IN SECTION 02111.

2. THE CONTRACTOR SHALL MAINTAIN ALL EROSION AND SEDIMENTATION CONTROLS
PREVIOUSLY INSTALLED AS SPECIFIED IN SECTION 02910 DURING RESTORATION
ACTIVITIES.

3. COVER SOIL SHALL BE AS SPECIFIED IN SECTION 02140.

4. SEEDING SHALL BE AS SPECIFIED IN THESE CONTRACT DOCUMENTS AND IN
ACCORDANCE WITH SECTION 02921.

5. THE CONTRACTOR SHALL RESTORE DAMAGED AREAS OUTSIDE OF THE WORK
AREA ONCE RESTORATION ACTIVITIES ARE COMPLETED.

6. RESTORATION AROUND TREES AND BUSHES TO BE LEFT IN PLACE SHALL BE
SUBJECT TO THE EXCLUSION RADIUS RESTRICTIONS THAT ARE SPECIFIED IN
SECTION 02111.

7. BACKFILL ON WET SUBGRADE AS A RESULT OF GROUNDWATER MAY BE
ENCOUNTERED AT SHALLOW DEPTHS ADJACENT TO THE NORTHWEST TRIBUTARY
AND PONDS. CONTRACTOR MAY NEED TO PLACE BACKFILL IN WET AREAS. BACKFILL
IN ACCORDANCE WITH THE REQUIREMENTS OF SECTION 02300.

8. THE SITE AREAS MAY CONTAIN FENCING FOR SECURITY AND LIVESTOCK CONTROL.
MANY OF THE EXISTING FENCES ARE NOT SHOWN ON THE DRAWINGS BECAUSE OF
HEAVY VEGETATION. WHERE REMOVAL OF THE FENCING IS REQUIRED FOR SITE
EXCAVATION AND RESTORATION, THE CONTRACTOR SHALL REPLACE THE EXISTING
FENCING WITH NEW, LIKE MATERIALS PER SECTION 02830 AT THE ORIGINAL FENCING
LOCATIONS.

9. THE CONTRACT DRAWINGS INCLUDE THE LOCATIONS AND DESIGN DETAILS OF
SPECIFIC WORK ELEMENTS TO BE COMPLETED BY THE CONTRACTOR TO MAINTAIN
AND RESTORE STABILITY OF THE CREEK CHANNEL AND ITS STREAM BANK BASED ON
GEOMORPHOLOGICAL CONSIDERATIONS. REFER TO THE INDIVIDUAL DRAWINGS FOR
ADDITIONAL INFORMATION AND DESIGN DETAILS.

* ALL SYMBOLS AND ABBREVIATIONS ON THIS
SHEET ARE FOR GENERAL INFORMATION AND
MAY NOT NECESSARILY BE USED ON EVERY PAGE
WITHIN THESE CONTRACT DOCUMENTS.

STANDARD SECTION SYMBOL

SECTION NUMBER

SHEET WHERE SECTION
IS SHOWN

CREEK SOIL OR SEDIMENT SAMPLE
LOCATION AND NUMBER

TEST PIT LOCATION AND NUMBER

DIRECTION OF SLOPE

VEGETATION (TYPICAL)

PRIMARY HAUL ROUTE

LIMITS OF CONSTRUCTION

WATERSHED DELINEATION BOUNDARY

FINAL GRADE CONTOURS
(1 FOOT INTERVALS)

MINE WASTE CONSOLIDATION AREA
MAINTENANCE MONUMENT

STRAW WATTLE

DIRECTION OF STREAM/RIVER/DRAINAGE FLOW

- DIVERSION TERRACE/DIRECTION OF FLOW

DRAINAGE SWALE/TEMPORARY DIVERSION DITCH

MINE WASTE DISPOSAL/CONSOLIDATION AREA

CHANNEL TO BE FILLED

SUBSIDENCE PIT

CREEK/STREAM EDGE
STREAM EXCAVATION

SEEDING

TABLE 1

REFERENCE POINTS

DESIGNATION

EASTING

NORTHING

ELEVATION

2374526.15

1460489.88

837.60

TABLE 2

ESTIMATED NUMBER OF MINE SHAFTS

REMEDIATION AREA

NUMBER OF
MINE SHAFTS

AREA 1 (TX-12, TT-38)

AREA 2 (TX-33)

AREA 3 (TT-1, TC-2, TX-2, TX-47)

AREA 4 (TX-7 NORTH)

NOTE:

ESTIMATED NUMBER OF MINE SHAFTS BASED ON FIELD SURVEY AND AVAILABLE INFORMATION.
ADDITIONAL MINE SHAFTS MAY BE PRESENT.

TABLE 3

MINE WASTE DISPOSAL LOCATIONS

REMEDIATION AREA

AREA 2

TC-3

AREA 1 (TX-12, TT-38)

AREA 2 (TX-33)

AREA 3 (TT-1, TC-2, TX-2, TX-47)

AREA 4 (TX-7 NORTH)

NOTES:

1. FINAL DISPOSAL LOCATIONS MAY BE ADJUSTED BASED ON ACTUAL QUANTITIES OF
MINE WASTE ENCOUNTERED DURING CONSTRUCTION.

2. USABLE CHAT FROM AREA 3 SHALL BE HAULED TO TC-3.

TABLE 4

ESTIMATED AREA AND VOLUME OF WASTE AND
CONTAMINATED SOIL TO BE EXCAVATED AND
PLACED IN MINE WASTE CONSOLIDATION AREAS

REMEDIATION AREA

AREA

(AC)

ESTIMATED
VOLUME
(BCY)

AREA 1 (TX-12, TT-38)

17.7

106,500

AREA 2 (TX-33)

25.2

265,400

AREA 3 (TT-1, TC-2, TX-2, TX-47)

40.4

488,000

AREA 4 (TX-7 NORTH)

13.5

68,700

ESTIMATED TOTAL

104.9

945,000

NOTES:

1. AC = ACRE BCY = BANK CUBIC YARD N/A = NOT APPLICABLE

2. FOR PURPOSES OF BIDDING, THE ESTIMATED TOTAL AREA SHOWN IN TABLE 4 SHALL BE USED TO ESTIMATE
THE AREA REQUIRING SITE RESTORATION, INCLUDING GRADING AND REVEGETATION. THE LISTED VALUES
DESCRIBE ONLY THE AREA OVER WHICH THE MINE WASTE IS VISIBLE AT GROUND SURFACE. REFER TO TABLE 5
FOR ESTIMATED VOLUMES OF BACKFILL AND TOPSOIL.

3. THE VOLUME OF CONTAMINATED SOIL IS BASED ON AN ASSUMED 12-INCH INTERFACE DEPTH OF
CONTAMINATED SOIL UNDERLYING THE WASTE, A 12-INCH EXCAVATION DEPTH IN DEWATERED PONDS, AN
18-INCH EXCAVATION DEPTH IN THE CREEK CHANNEL BANKS, AND A 12-INCH EXCAVATION DEPTH 100 FEET FROM
THE EDGE OF THE CREEK CHANNEL BANK.

4. A 25 PERCENT OVERAGE WAS ADDED TO THE ESTIMATED WASTE VOLUMES TO ALLOW FOR IRREGULARITIES
AND OTHER UNKNOWNS.

TABLE 5

ESTIMATED VOLUME OF IMPORTED SUBGRADE BACKFILL
AND TOPSOIL TO BE REPLACED DURING SITE RESTORATION

EXCAVATED AREAS

CONSOLIDATION AREAS

REMEDIATION AREA

SELECT FILL
(ECY)

TOPSOIL
(ECY)

SELECT FILL

(ECY)

TOPSOIL

(ECY)

AREA 1 (TX-12, TT-38)

10,700

14,300

AREA 2 (TX-33)

8,400

16,500

33,300

16,700

AREA 3 (TT-1, TC-2, TX-2, TX-47)

29,100

32,700

AREA 4 (TX-7 NORTH)

6,200

11,000

NOTES:

1. ECY = EMBANKMENT CUBIC YARD

2. ALL VOLUMES ARE PRESENTED AS EMBANKMENT CUBIC YARDS AND CONTAIN NO OVERAGES.

3. ESTIMATED VOLUMES LISTED FOR EXCAVATED AREAS ASSUME A MINIMUM 6-INCH SELECT FILL SUBGRADE
BACKFILL AND 6-INCH TOPSOIL PLACED ACROSS THE MINE WASTE REMOVAL AREA AT EACH REMEDIATION AREA
WITH THE EXCEPTION OF THE TRIBUTARY CHANNEL IN AREA 3 AS NOTED ON THE DRAWINGS. ADDITIONAL
SUBGRADE MATERIAL MAY BE REQUIRED TO GRADE AND SHAPE THE DISTURBED AREAS IN ORDER TO MAINTAIN
POSITIVE DRAINAGE ACROSS EACH SITE.

FOR EPA USE IN PREPARING
CONTRACT DOCUMENTS

s&EPA

U.S. Environmental
Protection Agency
Region 7
Lenexa, Kansas

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SHEET
IDENTIFICATION

G-02

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AREA 1
(TX-12, T

PRIMARY
HAUL ROUTE

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TEMPORARY
HAUL ROAD
SEE NOTE 3

AREA 2

AREA 3 (TT-1,
TC'2, tX-2, TX-47)

/AREA 4 (TX-7

EXISTING BRIDGE
SEE NOTE 4

y Tailings

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PROVIDE TEMPORARY
HAUL ROAD AND I

— CREEK CROSSING '.

SEE NOTE 6 W y.

Tailings 111

EXISTING ROAD BRIDGE
SEE NOTE 5

Atemporary haul road

SEE NOTE 3

' I ladings

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//failings

WATERSHED-
DEUNEATiofi
BOUNDARY

.'^Sailings

iTfl ( failogs *.

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14 TaiMnes

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STATE LINE STREET (TREECE ROAD)

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pitfasti

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FOR EPA USE IN PREPARING
CONTRACT DOCUMENTS

NOTES:

(REFER TO SPECIFICATIONS FOR ADDITIONAL INFORMATION)

1. MAKE IMPROVEMENTS TO HAUL ROADS, AS NECESSARY, TO ACCOMMODATE CONSTRUCTION
EQUIPMENT. TEMPORARY HAUL ROADS MAY BE WIDENED TO PERMIT TWO-WAY TRAFFIC AS REQUIRED.

2. TRANSPORT MINE WASTE AND IMPORT MATERIAL IN ACCORDANCE WITH SECTION 02121. THE
CONTRACTOR SHALL MAINTAIN HAUL ROADS IN ACCORDANCE WITH SECTION 02121.

3. TEMPORARY ACCESS AND HAUL ROADS SHALL BE MAINTAINED IN ACCORDANCE WITH SECTION 02121.
TEMPORARY ACCESS AND HAUL ROADS SHALL BE REMOVED UPON COMPLETION OF WORK IN THAT
AREA UNLESS THE LANDOWNER REQUESTS IN WRITING THAT THEY REMAIN IN PLACE. IF SUCH A
REQUEST IS MADE, EPA MUST RECEIVE A COPY OF THE REQUEST. REMOVAL OF TEMPORARY ACCESS
AND HAUL ROADS SHALL INCLUDE REMOVAL AND PROPER DISPOSAL OF ANY MINE WASTE AND
IMPACTED SOIL AND REPLACEMENT WITH CLEAN FILL APPROVED BY EPA. DISTURBED AREAS SHALL BE
GRADED TO MATCH SURROUNDING AREAS AND SEEDED IN ACCORDANCE WITH SECTION 02921.

4. THE ENTRANCE TO AREA 2 (TX-33) CONSISTS OF AN EXISTING BRIDGE OVER A WATER CHANNEL. THE
CONTRACTOR SHALL NOT USE THIS BRIDGE FOR HAULING OF MATERIAL AND HEAVY EQUIPMENT USE.
DAMAGE TO THIS BRIDGE AND REPAIRS SHALL BE THE RESPONSIBILITY OF THE CONTRACTOR. A
TEMPORARY CROSSING SHALL BE CONSTRUCTED IN LIEU OF USING THE EXISTING BRIDGE. IF NEEDED
TO ACCESS AREA 2 FROM SW 20TH STREET, CONSTRUCT A TEMPORARY CROSSING OVER THE EXISTING
CREEK TRIBUTARY. THE LOCATION OF THE TEMPORARY CROSSING SHALL BE REMOVED UPON
ACCEPTANCE OF SITE RESTORATION BY EPA.

5. THE CONTRACTOR SHALL DETERMINE WHETHER THE CONDITION OF THE EXISTING BRIDGE ON SW
20TH STREET IS SUITABLE FOR USE. DAMAGE TO THIS BRIDGE AND REPAIRS WILL BE THE
RESPONSIBILITY OF THE CONTRACTOR.

6. PROVIDE TEMPORARY TAR CREEK HAUL ROAD AND CREEK CROSSING FOR HAULING MINE WASTE
FROM THE AREA 3 (TC-2) CHAT PILE TO TC-3. SEE SHEET G-04 FOR ADDITIONAL DETAILS.

7. THE SOURCE OF THE TOPOGRAPHIC IMAGES IS UNITED STATES GEOLOGICAL SURVEY, 1978.

1" = 1000'

&EPA

U.S. Environmental
Protection Agency
Region 7
Lenexa, Kansas

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SHEET

IDENTIFICATION

G-03

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TEMPORARY -
HAUL ROAD



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TEMPORARY CREEK
CROSSINGS
SEE NOTE 2

INITIAL LIMITS OF
CONSTRUCTION

ROAD

SW STAR ROAD

FOR EPA USE IN PREPARING
CONTRACT DOCUMENTS

&EPA

U.S. Environmental
Protection Agency
Region 7

Lenexa, Kansas	

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SHEET

IDENTIFICATION

G-04

1" = 150'
W

NOTES:

1. MAKE IMPROVEMENTS TO HAUL ROADS, AS NECESSARY, TO ACCOMMODATE
CONSTRUCTION EQUIPMENT.

2. CONSTRUCT A TEMPORARY CROSSING OVER TAR CREEK IN ACCORDANCE
WITH THE CONTRACTOR'S WATER AND SEDIMENT MANAGEMENT PLAN. NO
OTHER CROSSING SHALL BE USED UNLESS APPROVED BY EPA.

3. THE TEMPORARY CROSSING WILL BE LEFT IN PLACE FOR FUTURE PHASES
OF WORK.

-------
WETLAND SITE PLAN

WETLAND SITE PLAN NOTES:

(REFER TO SPECIFICATION FOR ADDITIONAL INFORMATION)

1.	AS SHOWN ON SHEET G-04, THE PRELIMINARY CONSTRUCTION LIMITS REQUIRE
REMEDIATION OF MINE WASTE AND IMPACTED SOIL WITHIN BROAD AREAS OF THE
SITE WHICH HAVE BEEN CLASSIFIED AS THE FOLLOWING TYPES OF WETLANDS:
PALUSTRINE EMERGENT, PALUSTRINE FORESTED, AND PALUSTRINE SCRUB SHRUB.

2.	THE REMEDIAL DESIGN PROVIDES FOR EXCAVATION OF MINE WASTE AND
IMPACTED SOIL (HEAVY METAL CONCENTRATIONS EXCEEDING THE SOIL
REMEDIATION STANDARDS) WITHIN THE EXISTING WETLAND AREAS FOLLOWED BY
PLACEMENT OF CLEAN FILL AND TOPSOIL, AND REVEGETATION OF ALL DISTURBED
AREAS TO RECONSTRUCT/RESTORE THE WETLANDS IMPACTED BY THE REMEDIAL
ACTIVITIES. WHEN REMEDIAL ACTION IS COMPLETED, THE AREAL EXTENT AND
QUALITY OF THE WETLANDS IS EXPECTED TO MEET OR EXCEED CURRENT
CONDITIONS.

3.	THE CONTRACTOR IS RESPONSIBLE FOR LIMITING HIS WORK AREA TO MINIMIZE
DISTURBANCE OF THE WETLANDS TO ONLY THOSE AREAS REQUIRING REMEDIATION.

4.	THE PERFORMANCE WORK STATEMENT AND SECTION 02955 HAVE SPECIFIC
PERFORMANCE REQUIREMENTS FOR THE TYPES OF FILL MATERIALS, TOPSOIL,
SEEDING AND PLANTINGS REQUIRED FOR RECONSTRUCTION/RESTORATION OF THE
WETLANDS.

WETLAND - PALUSTRINE
SCRUB SHRUB

WETLAND OUTUNE

AREA BOUNDARY

N

1" = 300'

nnn

FOR EPA USE IN PREPARING
CONTRACT DOCUMENTS

&EPA

U.S. Environmental
Protection Agency
Region 7
Lenexa, Kansas

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SHEET
IDENTIFICATION

G-05

-------
CULTIVATED FIELD
(NO FENCE)

CULTIVATED
FIELD

CONCRETE
STRUCTURES

¦ GRASS STRIP

DENSE
WOODS

CULTIVATED
FIELD

THIN CHAT
AND TAILINGS

EXCAVATE MINE WASTE
SEE NOTES 3 AND 5

TT—38—5

CULTIVATED
FIELD

TAILINGS

V ^

SHALLOW DITCH

DITCH

DITCH

. lt-38-6

TAILINGS

TAILINGS

TEMPORARY HAUL ROAD
TO DISPOSAL AREA 2
SEE NOTES 2 AND 3

BERM

CULTIVATED
FIELD

INITIAL LIMITS OF
CONSTRUCTION

MATCH LINE

FOR CONTINUATION SEE SHT C-02

EXCAVATION PLAN
AREA 1 (TX-12 AND TT-38)

EXCAVATION PLAN NOTES:

(REFER TO SPECIFICATION FOR ADDITIONAL INFORMATION)

1.	THE AREA 1 (TX-12 AND TT-38) MINE WASTE AREA CONTAINS
DISCONTINUOUS AREAS OF SHALLOW CHAT, TAILINGS, AND OTHER MINE
WASTE MIXED WITH SOIL. THE AREA IS PARTIALLY WOODED AND CONTAINS
FORMER MINE WORKS STRUCTURES AND DISCRETE AREAS OF SOLID WASTE.
THE SURROUNDING SITE PROPERTY IS USED FOR AGRICULTURE.

2.	AREA 1 IS LOCATED ADJACENT TO THE DISPOSAL AREA 2. THE ABANDONED
RAILROAD SHALL BE USED AS A TEMPORARY HAUL ROAD TO THE MINE
WASTE CONSOLIDATION AREA SHOWN ON SHEET C-02/C-03. THE TEMPORARY
HAUL ROAD TRAVERSES MULTIPLE PROPERTIES AND FENCING USED FOR
AGRICULTURE AND LIVESTOCK CONTROL. THE CONTRACTOR SHALL
COORDINATE HIS WORK WITH THE PROPERTY OWNERS AND MAINTAIN
LIVESTOCK CONTROL IN ACCORDANCE WITH THE CONTRACTOR'S LIVESTOCK
MANAGEMENT PLAN.

3.	CONDUCT XRF ANALYSIS (FIELD XRF SCREENING WITH PORTABLE
INSTRUMENT) WITHIN THE INITIAL CONSTRUCTION LIMITS WHERE VISIBLE
MINE WASTE IS NOT PRESENT TO IDENTIFY AREA(S) REQUIRING
REMEDIATION. XRF SCREENING SHALL BE CONDUCTED ON A 50-FOOT GRID
IN ACCORDANCE WITH THE APPROVED QUALITY ASSURANCE PLAN AS
REQUIRED BY THE PERFORMANCE WORK STATEMENT. PROVIDE EPA WITH A
SITE PLAN SHOWING THE GRID LOCATIONS, XRF RESULTS, AND
INTERPRETED AREAS REQUIRING EXCAVATION. THE PROPOSED AREAS OF
EXCAVATION SHALL BE APPROVED BY EPA PRIOR TO EXCAVATION. THE AREA
SURROUNDING THE TEMPORARY HAUL ROUTE BETWEEN AREA 1 AND AREA 2
INCLUDES WOODED AREAS, DISCRETE AREAS OF MINE WASTE, BULLROCK
PILES, OTHER MINING RELATED FEATURES, AND SOLID WASTE. THE
CONTRACTOR'S SITE PLAN SHOWING THE PROPOSED LIMITS OF EXCAVATION
SHALL INCLUDE DELINEATION OF AREAS OF VISIBLE MINE WASTE TO BE
EXCAVATED, BACKFILLED, AND RESEEDED BETWEEN AREAS 1 AND 2. THE
LIMITS OF CONSTRUCTION SHALL BE REVISED AS NECESSARY TO OBTAIN
ACCESS AND TO COMPLETE EXCAVATION OF ALL WASTE AND
CONTAMINATED SOIL.

4.	FOR PURPOSES OF BIDDING, REFER TO TABLE 4 ON SHEET G-02 FOR
ESTIMATED WASTE AND CONTAMINATED SOIL VOLUMES. THE DEPTH OF
EXCAVATION SHALL BE BASED ON CONFIRMATION SAMPLING IN
ACCORDANCE WITH SECTION 02111.

5.	EXCAVATE MINE WASTE IN ACCORDANCE WITH SECTION 02111.

EXCAVATED MINE WASTE AND CONTAMINATED SOIL FROM AREA 1 SHALL BE
DISPOSED OF IN ACCORDANCE WITH TABLE 3 ON SHEET G-02. THE FINAL
EXCAVATION SURFACE SHALL BE GRADED IN ACCORDANCE WITH SECTION
02111.

TEST PIT TABLE

TEST PIT ID#

APPROX.
THICKNESS

OF MINE
WASTE (FT.)

TYPES OF MINE WASTE
ENCOUNTERED (ORDER AS DEPTH
INCREASES)

COMMENTS

TT-38-1

0.5

CHAT



TT-38-2

2

TAILINGS

POSSIBLE NATIVE (LIGHT
GRAY) CLAY 1-1.5 FT.

TT-38-3

1.3

SILTY CLAY, TAILINGS, SILTY CLAY



TT-38-4

1.5

CHAT, TAILINGS



TT-38-5

<0.5

TAILINGS



TT-38-6

2

TAILINGS



TT-38-7

2

TAILINGS



TT-38-8

5

TAILINGS



TT-38-9

5

TAILINGS



TX-12-1

1.5

CHAT

WATER AT 1 FT.

TX-12-2

1.5

CHAT



TX-12-3

0.75

CHAT



TX-12-4

4

TAILINGS



TX-12-5

0.75

TAILINGS



6. REFER TO NOTES ON SHEET G-02 FOR ADDITIONAL INFORMATION.

RESTORATION PLAN
AREA 1 (TX-12 AND TT-38)

RESTORATION PLAN NOTES:

(REFER TO SPECIFICATIONS FOR ADDITIONAL INFORMATION)

1.	THE GRADING AND RESTORATION REQUIREMENTS SHOWN ON THE

DRAWINGS ARE CONCEPTUAL AND MAY BE ADJUSTED OR MODIFIED BASED

ON SITE CONDITIONS FOLLOWING COMPLETION OF MINE WASTE

EXCAVATION. THIS AREA SHALL BE RESTORED SUCH THAT THE AREA CAN BE

CULTIVATED IN THE FUTURE.

2.	REMOVE AND RESTORE TEMPORARY HAUL ROAD AND FORMER RAILROAD

SPUR IN ACCORDANCE WITH NOTE 3 ON G-03.

3.	COMPLETION OF SITE RESTORATION SHALL CONFORM TO SECTION 02300

AND THE FOLLOWING CRITERIA:

-	THE EXCAVATED AREAS SHALL BE BACKFILLED WITH CLEAN, SILTY CLAY
BACKFILL AND 6 INCHES OF IMPORTED ORGANIC TOPSOIL, AS REFERENCED
IN THE CONTRACTOR'S APPROVED BORROW MANAGEMENT PLAN. BORROW
SOURCES SHALL BE APPROVED BY EPA PRIOR TO SITE RESTORATION.
REFER TO SECTION 02140 FOR ADDITIONAL INFORMATION.

-	SITE DRAINAGE PATTERNS SHALL GENERALLY CONFORM TO THE
DIRECTIONAL ARROWS AS SHOWN ON THE DRAWINGS.

-	THE EXCAVATED AREAS SHALL BE REGRADED AS NECESSARY TO PROVIDE
POSITIVE SURFACE DRAINAGE, WITH CROSS SLOPES OF 1 TO 3 PERCENT
AND MATCH THE SURROUNDING GRADE.

-	REFER TO TABLE 5 ON SHEET G-02 FOR ESTIMATED VOLUME OF IMPORTED
FILL AND TOPSOIL.

4.	SEED ALL DISTURBED AREAS WITH A NATIVE GRASS SEED MIX OR
PERMANENT PASTURE GRASS SEED MIX BASED ON THE OWNER'S
PREFERENCE AND IN ACCORDANCE WITH SECTION 02921.

5.	REFER TO NOTES ON SHEET G-02 FOR ADDITIONAL INFORMATION.

FOR EPA USE IN PREPARING
CONTRACT DOCUMENTS

&EPA

U.S. Environmental
Protection Agency
Region 7
Lenexa, Kansas

SHEET

IDENTIFICATION

-------
MATCH LINE

FOR CONTINUATION SEE SHT C-01

TEMPORARY HAUL
ROUTE TO AREA 1
SEE NOTE 3

CULTIVATED FIELD

EXISTING POND
(OPEN WATER)

FORMER RAILROAD SPUR

EXCAVATE MINE WASTE
OUTSIDE OF MINE WASTE
CONSOLIDATION AREA
SEE NOTES 4 AND 7 AND 6

PASTURE

LARGE POND OF
WATER WITH CATTAILS
ALONG PERIMETER

TURBID

POND-LIKE

FEATURE

PASTURE

TRACE CHAT

REMOVE
CONTAMINATED
SEDIMENT
SEE NOTE 8

PASTURE

WITH

WOODS

r POORLY
>, DRAINED
WITH BRUSH
AND TREES

TRACE CHAT
AND ROCK

CULTIVATED
FIELD

FENCED
PASTURE

REMOVE
CATTLE PENS

MINE WASTE
CONSOLIDATION AREA

SELECTIVE

REMEDIATION

ZONE

*62300

| ^
CHAT

THROUGHOUT

POORLY
DRAINED

CONCRETE
STRUCTURES

TRACE CHAT

INTERMITTENT

ASPHALT

PAVEMENT

FENCE
SEE NOTE 1

BULLROCK WITH
SOIL/CHAT

SOIL WITH "T"
TRACE CHAT TX-33-

BULLROCK
WITH CHAT

CULTIVATED
FIELD

/—STREAM EXCAVATION
' SEE NOTE 9

FENCED
PASTURE

FENCE
SEE NOTE 1

INITIAL LIMITS OF
CONSTRUCTION

FENCED
PASTURE

vTX—33-120

REMOVE BARBED WIRE —

FENCE WITHIN MINE X
WASTE CONSOLIDATION \

AREA FOOTPRINT \

TEST PIT TABLE

TEST PIT ID#

APPROX.
THICKNESS

OF MINE
WASTE (FT.)

TYPES OF MINE WASTE
ENCOUNTERED (ORDER AS
DEPTH INCREASES)

COMMENTS

TX-33-1

3.5

CHAT

TX-33-2

CHAT

TX-33-3

0.5

TAILINGS

ADJACENT TO N/S FENCE

TX-33-4

CHAT

TX-33-5

2.5

CHAT

IRON STAINING JUST ABOVE CLAY at 2.5 FT.

TX-33-6

CHAT

IRON STAINING JUST ABOVE CLAY AT 2 FT.

TX-33-7

1.5

CHAT

TX-33-8

2.5

CHAT

TX-33-9

CHAT

TX-33-10

2.75

CHAT

TX-33-11

CHAT, TAILINGS

TX-33-12

2.5

CHAT, TAILINGS

TX-33-13

2.5

CHAT, TAILINGS

TX-33-14

2.5

CHAT, TAILINGS

WATER AT 2.5 FT.

TX-33-15

5.5

CHAT, TAILINGS

TX-33-16

1.5

TAILINGS

TX-33-17

2.5

TAILINGS

TX-33-18

CHAT, TAILINGS

TX-33-19

6 +

CHAT

WATER AT 2 FT. HOLE COLLAPSED BEFORE
REACHING NATIVE SOIL.

TX-33-20

5 +

CHAT

WATER AT 1.5 FT. HOLE COLLAPSED BEFORE
REACHING NATIVE SOIL.

TX-33-21

CHAT, TAILINGS

WATER AT 5 FT.

XRF SCREENING RESULTS

SAMPLE ID#

DEPTH (FT.)

LEAD
(MG/KG)

ZINC
(MG/KG)

CADMIUM
(MG/KG)

COMMENTS

CK-19

SURFACE

959

17200

136

UPSTREAM OF BRIDGE AT 20TH ST, GRAY SILTY CLAY WITH TRACE FINE SAND

CK-20

SURFACE

199

2695

PRIMARILY CHAT

CK-21

SURFACE

140

5766

GRAY, SILTY CLAY WITH TRACE FINE SAND AND ORGANICS

CK-102

SURFACE

213

6603

PRIMARILY CHAT

CK-104

SURFACE

1351

17400

114

GRAY, SILTY CLAY WITH TRACE FINE SAND

TX-33-SS1

SURFACE

185

1016

TX-33-SS2

SURFACE

285

TX-33-SS3

SURFACE

762

7687

DARK BROWN, SILTY CLAY TOPSOIL (FIELD CHECK COORDINATES)

TX-33-SS4

SURFACE

673

10355

DARK BROWN, SILTY CLAY TOPSOIL (WATER ENTRY AT DEPTH OF 6")

TX-33-SS5

SURFACE

324

5993

DARK BROWN, SILTY CLAY TOPSOIL (WATER ENTRY AT DEPTH OF 6")

TX-33-SD1

0.5

288

13300

CHAT WITH TRACE CLAY (SATURATED)

TX-33-101

SURFACE

10600

647

116

TX-33-102

SURFACE

1528

230

TX-33-103

SURFACE

24800

1470

117

TX-33-104

SURFACE

12100

1845

126

TX-33-105

SURFACE

9456

713

0.25

9315

1822

TX-33-106

SURFACE

4721

232

TX-33-107

SURFACE

35200

866

197

TX-33-108

SURFACE

9119

928

TX-33-109

SURFACE

154000

1653

144

TX-33-110

SURFACE

22600

1627

204

TX-33-111

SURFACE

19000

1435

141

TX-33-112

SURFACE

16300

1784

145

TX-33-113

SURFACE

14100

1164

TX-33-114

SURFACE

2551

409

TX-33-115

SURFACE

9772

962

TX-33-116

SURFACE

686

171

TX-33-117

SURFACE

20900

4265

111

TX-33-118

SURFACE

13300

1547

172

TX-33-119

SURFACE

1716

362

TX-33-120

SURFACE

10100

934

EXCAVATION PLAN
AREA 2 (TX-33)

FOR EPA USE IN PREPARING
CONTRACT DOCUMENTS

EXCAVATION PLAN NOTES:

(REFER TO SPECIFICATION FOR ADDITIONAL INFORMATION)

1. THE AREA 2 (TX-33) MINE WASTE AREA IS CURRENTLY USED TO GRAZE LIVESTOCK AND IS LOCATED ADJACENT TO
CULTIVATED FIELDS. THE SITE CONTAINS DISCONTINUOUS AREAS OF SHALLOW CHAT AND OTHER MINE WASTE MIXED
WITH SOIL, LARGE AREA OF CHAT, TAILINGS, AREAS OF CONCRETE RUBBLE, AND VENT PIPES. THE CONTRACTOR
SHALL COORDINATE REMEDIAL ACTIVITIES WITH THE PROPERTY OWNERS AND PROVIDE TEMPORARY FENCING FOR
LIVESTOCK CONTROL, AS NEEDED, DURING THE REMEDIAL ACTIVITIES.

2. SITE ACCESS ROAD IS A GRAVEL TRAIL LOCATED ON THE SOUTHEASTERN EDGE OF THE LIMITS OF CONSTRUCTION
AS INDICATED ON THE CONTRACT DRAWING. THE GRAVEL TRAIL IS OFF SW20TH STREET. CONTRACTOR SHALL MAKE
IMPROVEMENTS TO THE ROAD AS NECESSARY. TRAFFIC CONTROL SHALL BE USED FOR ALL TRUCKS AND EQUIPMENT
ENTERING AND EXITING SITE IN ACCORDANCE WITH SECTION 02121. REFER TO NOTES ON SHEET G-03 REGARDING
THE CONTRACTOR'S RESPONSIBILITY FOR ANY DAMAGES TO THE EXISTING BRIDGE ON SW20TH STREET AND THE
BRIDGE ALONG THE EXISTING FARM TRAIL ACCESS ROAD TO AREA 2 LOCATED WEST OF SW20TH STREET.

3. AREA 2 IS LOCATED ADJACENT TO AREA 1. THE ABANDONED RAILROAD SHALL BE USED AS A TEMPORARY HAUL
ROUTE FROM AREA 1 TO THE AREA 2 MINE WASTE CONSOLIDATION AREA.

4. CONDUCT XRF ANALYSIS (FIELD XRF SCREENING WITH PORTABLE INSTRUMENT) WITHIN THE INITIAL
CONSTRUCTION LIMITS WHERE VISIBLE MINE WASTE IS NOT PRESENT AND OUTSIDE THE PROPOSED LIMITS OF
THE MINE WASTE CONSOLIDATION AREA TO IDENTIFY AREA(S) REQUIRING REMEDIATION. XRF SCREENING
SHALL BE CONDUCTED ON A 50-FOOT GRID IN ACCORDANCE WITH THE APPROVED QUALITY ASSURANCE PLAN
AS REQUIRED BY THE PERFORMANCE WORK STATEMENT. PROVIDE EPA WITH A SITE PLAN SHOWING THE GRID
LOCATIONS, XRF RESULTS, AND INTERPRETED AREAS REQUIRING EXCAVATION. THE PROPOSED AREAS OF
EXCAVATION SHALL BE APPROVED BY EPA PRIOR TO EXCAVATION. THE LIMITS OF CONSTRUCTION SHALL BE
REVISED AS NECESSARY TO OBTAIN ACCESS AND TO COMPLETE EXCAVATION OF ALL WASTE AND
CONTAMINATED SOIL.

5. FOR PURPOSES OF BIDDING, REFER TO TABLE 4 ON SHEET G-02 FOR ESTIMATED WASTE AND CONTAMINATED
SOIL VOLUMES. THE DEPTH OF EXCAVATION SHALL BE BASED ON CONFIRMATION SAMPLING IN ACCORDANCE
WITH SECTION 02111.

6. EXCAVATED MINE WASTE AND CONTAMINATED SOIL SHALL BE PLACED WITHIN THE AREA 2 MINE WASTE
CONSOLIDATION AREA SHOWN ON THE CONTRACT DRAWING.

7. EXCAVATE MINE WASTE OUTSIDE OF MINE WASTE CONSOLIDATION AREA FOOTPRINT IN ACCORDANCE WITH
SECTION 02111. PLACE THE EXCAVATED WASTE WITHIN THE WASTE CONSOLIDATION AREA AS SHOWN ON THE
DRAWING AND IN ACCORDANCE WITH SECTION 02111. THE FINAL EXCAVATION SURFACE SHALL BE GRADED IN
ACCORDANCE WITH SECTION 02111.

8. REMOVE VISIBLE MINE WASTE ALONG THE SHORELINE OF THE POND. POND SHALL BE DEWATERED IN THE AREA OF
THE EXCAVATION SHOWN AND IN ACCORDANCE WITH THE CONTRACTOR'S APPROVED DEWATERING AND SEDIMENT
MANAGEMENT PLAN. REMOVE VISIBLE MINE WASTE AND 12 INCHES OF SEDIMENT FROM THE AREA SHOWN.

9. EXCAVATE THE CREEK CHANNEL, BANK TO BANK, TO A DEPTH OF 18 INCHES BELOW THE EXISTING CHANNEL
BOTTOM TO REMOVE MINE WASTE AND CONTAMINATED SOIL. REFER TO SHEETS CS-01 THROUGH CS-06 FOR TYPICAL
EXCAVATION DETAILS. PLACE THE EXCAVATED MATERIALS WITHIN THE MINE WASTE CONSOLIDATION AREA.
FOLLOWING EXCAVATION, PERFORM XRF SCREENING OF SOIL SAMPLES ALONG THE FLOW LINE AT 100 FOOT
INTERVALS. PROVIDE THE SCREENING DATA TO EPA FOR EVALUATION BEFORE PLACING RIPRAP AND OTHER SITE
IMPROVEMENTS AS SHOWN ON THE DRAWINGS.

&EPA

U.S. Environmental
Protection Agency
Region 7

^nexaj
-------
DRAINAGE SWALE

MINE WASTE
CONSOLIDATION AREA
SEE NOTE 3

INSTALL MAINTENANCE

MONUMENT

SEE NOTE 7

RESTORE STREAM
SEE NOTE 5
SEE SHEET C-08
FOR STREAM
RESTORATION DETAILS

RESTORE AREA
AS NEEDED
SEE NOTE 2

NEWBURY RIFFLE /_

STA 37+38 \€D^

BERM/RIFFLE
TIE-IN

POOL IMPOUNDMENT.
BERM

BARBED-WIRE FENCE
SEE NOTE 8

DIVERSION TERRACE

SEDIMENT
EXCAVATION AREA
SEE NOTE 4

RIPRAP PROTECTED,
CHANNEL I

STREAM

-RESTORE STREAM
SEE NOTE 5
SEE SHEET C-09
FOR STREAM
RESTORATION DETAILS

DRAINAGE SWALE

INITIAL LIMITS OF
CONSTRUCTION

STRAW WATTLES
SEE NOTE 9

DRAINAGE LET DOWN

BARBED-WIRE FENCE
SEE NOTE 8

NEWBURY RIFFLE
STA 22+29

FOR EPA USE IN PREPARING
CONTRACT DOCUMENTS

&EPA

U.S. Environmental
Protection Agency
Region 7

^nexaj
-------
EXCAVATION PLAN NOTES:

(REFER TO SPECIFICATION FOR ADDITIONAL INFORMATION)

1. THE AREA 3 (TT-1, TC-2, TX-2, AND TX-47) MINE WASTE AREA IS CURRENTLY USED TO GRAZE LIVESTOCK AND IS LOCATED ADJACENT TO
CULTIVATED FIELDS. THE SITE CONTAINS DISCONTINUOUS AREAS OF SHALLOW CHAT AND OTHER MINE WASTE MIXED WITH SOIL, A
LARGE CHAT PILE, TAILINGS, AREAS OF CONCRETE RUBBLE, AND VENT PIPES. THE CONTRACTOR SHALL COORDINATE REMEDIAL
ACTIVITIES WITH THE PROPERTY OWNERS AND PROVIDE TEMPORARY FENCING FOR LIVESTOCK CONTROL, AS NEEDED, DURING THE
REMEDIAL ACTIVITIES.

2. SITE ACCESS IS THROUGH A GATE ALONG AN EXISTING FENCE LINE EAST OF SW20TH STREET LOCATED ON THE WESTERN EDGE OF
THE LIMITS OF CONSTRUCTION AND THROUGH A GATE ALONG AN EXISTING FENCE LINE NORTH OF STAR ROAD ON THE SOUTHERN EDGE
OF LIMITS OF CONSTRUCTION AS INDICATED ON THE CONTRACT DRAWING. CONTRACTOR SHALL MAKE IMPROVEMENTS TO ACCESS THE
SITE AS NECESSARY. TRAFFIC CONTROL SHALL BE USED FOR ALL TRUCKS AND EQUIPMENT ENTERING AND EXITING SITE IN
ACCORDANCE WITH SECTION 02121. REFER TO NOTES ON SHEET G-03 REGARDING THE CONTRACTORS RESPONSIBILITY FOR ANY
DAMAGES TO THE EXISTING BRIDGE ON SW20TH STREET.

3. AREA 4 IS LOCATED ADJACENT TO AREA 3. THE EXISTING TRAIL SHALL BE USED AS A TEMPORARY HAUL ROUTE FROM AREA 3 TO TC-3.

4. CONDUCT XRF ANALYSIS (FIELD XRF SCREENING WITH PORTABLE INSTRUMENT) WITHIN THE INITIAL CONSTRUCTION LIMITS WHERE
VISIBLE MINE WASTE IS NOT PRESENT AND OUTSIDE THE PROPOSED LIMITS OF THE MINE WASTE CONSOLIDATION AREA TO IDENTIFY
AREA(S) REQUIRING REMEDIATION. XRF SCREENING SHALL BE CONDUCTED ON A 50-FOOT GRID IN ACCORDANCE WITH THE APPROVED
QUALITY ASSURANCE PLAN AS REQUIRED BY THE PERFORMANCE WORK STATEMENT. PROVIDE EPA WITH A SITE PLAN SHOWING THE
GRID LOCATIONS, XRF RESULTS, AND INTERPRETED AREAS REQUIRING EXCAVATION. THE PROPOSED AREAS OF EXCAVATION SHALL BE
APPROVED BY EPA PRIOR TO EXCAVATION. THE LIMITS OF CONSTRUCTION SHALL BE REVISED AS NECESSARY TO OBTAIN ACCESS AND
TO COMPLETE EXCAVATION OF ALL WASTE AND CONTAMINATED SOIL.

5. FOR PURPOSES OF BIDDING, REFER TO TABLE 4 ON SHEET G-02 FOR ESTIMATED WASTE AND CONTAMINATED SOIL VOLUMES. THE
DEPTH OF EXCAVATION SHALL BE BASED ON CONFIRMATION SAMPLING IN ACCORDANCE WITH SECTION 02111.

6. EXCAVATE THE CREEK CHANNEL, BANK TO BANK, TO A DEPTH OF 18 INCHES BELOW THE EXISTING CHANNEL BOTTOM TO REMOVE
MINE WASTE AND CONTAMINATED SOIL. REFER TO SHEET CD-05 FOR TYPICAL EXCAVATION DETAILS. FOLLOWING EXCAVATION,

PERFORM XRF SCREENING OF SOIL SAMPLES ALONG THE FLOW LINE AT 100 FOOT INTERVALS. PROVIDE THE SCREENING DATA TO EPA
FOR EVALUATION BEFORE PLACING RIPRAP AND OTHER SITE IMPROVEMENTS AS SHOWN ON THE DRAWINGS.

7. VENT PIPES SHALL BE ABANDONED IN ACCORDANCE WITH SECTION 02521.

8. BRIDGE STRUCTURE CONSISTS OF CONCRETE ABUTMENTS AND STEEL BEAMS.

9. REFER TO NOTES ON SHEET G-02 FOR ADDITIONAL INFORMATION.

TEST PIT TABLE

TEST PIT ID#

APPROX.
THICKNESS

OF MINE
WASTE (FT.)

TYPES OF MINE WASTE
ENCOUNTERED (ORDER AS
DEPTH INCREASES)

COMMENTS

TT-1-1

3.5

TAILINGS

DRY

TT-1-2

3.5

TAILINGS

DRY

TT-1-3

TAILINGS

DRY

TT-1-4

7.5

TAILINGS

DRY

TT-1-5

NONE

DRY

TC-2-1

NONE

DRY

TC-2-2

NONE

DRY

TC-2-3

NONE

DRY

TC-2-4

CHAT, TAILINGS

MINOR SEEP AT 6 FT.

TC-2-5

CHAT, TAILINGS

CHAT PINCHED OUT IN MIDDLE OF PIT. WATER AT 2.75 FT.

TC-2-6

0.75

CHAT

SLOW SEEP AT 1 FT.

TC-2-7

NONE

SAMPLE COLLECTED OF SILT MATERIAL TO DETERMINE IF
WASTE. DRY.

TC-2-8

NONE

SAMPLE COLLECTED OF SILT MATERIAL TO DETERMINE IF
WASTE. DRY.

TC-2-9

NONE

SAME SILT MATERIAL AS ABOVE. DRY.

TC-2-10

NONE

SAME SILT MATERIAL AS ABOVE. DRY.

TC-2-11

1.5

CHAT

SAME SILT MATERIAL AS ABOVE. DRY.

TC-2-12

5.5

TAILINGS

DRY

TC-2-13

2.25

CHAT, TAILINGS

DRY

TC-2-14

TAILINGS, CHAT

DRY

TC-2-15

1.25

TAILINGS

WATER SEEP AT 4 FT.

TC-2-16

TAILINGS

DRY

TC-2-17

7 +

TAILINGS

HOLE COLLAPSED, NATIVE SOIL NOT ENCOUNTERED.

TC-2-18

TAILINGS

DRY

TC-2-19

6 +

CHAT, TAILINGS

WATER AT 3 FT. HOLE COLLAPSED, NATIVE SOIL NOT
ENCOUNTERED.

TC-2-20

TAILINGS, CHAT

TC-2-21

5 +

CHAT, TAILINGS

WATER SEEP AT 2.5 FT. HOLE COLLAPSED, NATIVE SOIL
NOT ENCOUNTERED.

r =

50 0

XRF SCREENING RESULTS

SAMPLE ID#

DEPTH

(FT.)

LEAD

(MG/KG)

ZINC
(MG/KG)

CADMIUM
(MG/KG)

COMMENTS

CK-17

SURFACE

253

7271

FINE CHAT WITH SILT/CLAY

CK-18

SURFACE

408

8016

DARK BROWN MIXTURE OF SILTY/CLAY WITH ROOTS/ORGAN ICS

CK-19

SURFACE

959

17200

136

UPSTREAM OF BRIDGE AT 20TH ST, GRAY SILTY CLAY WITH TRACE FINE SAND

TC-2-SS1

SURFACE

407

2205

DARK BROWN, SILTY CLAY WITH CHAT

TC-2-SS2

SURFACE

1650

4516

DARK BROWN, SILTY CLAY TOPSOIL

TC-2-SS3

SURFACE

362

2937

DARK BROWN, SILTY CLAY TOPSOIL (WATER ENTRY AT DEPTH OF 6")

TC-2-SS4

SURFACE

1424

5307

DARK BROWN, SILTY CLAY TOPSOIL

TC-2-100

SURFACE

8389

810

TC-2-101

SURFACE

3267

444

EXCAVATION PLAN
AREA 3 (TT-1, TC-2,
TX-2, TX-47)

FOR EPA USE IN PREPARING
CONTRACT DOCUMENTS

&EPA

U.S. Environmental
Protection Agency
Region 7
Lenexa, Kansas

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IDENTIFICATION

C-04

-------
DRAINAGE SWALE

INITIAL LIMITS OF
CONSTRUCTION

BARBED-WIRE FENCE
SEE NOTE 5

•BARBED-WIRE FENCE
SEE NOTE 5

INSTALL 12"
HDPE CULVERT

DRAINAGE SWALE

DRAINAGE
SWALE

NEWBURY RIFFLE
STA 17+20

STREAM £

RESTORE STREAM
SEE NOTE 3
SEE SHEETS C-10 AND
C—11 FOR STREAM
RESTORATION DETAILS

RESTORE AREA
AS NEEDED
SEE NOTE 4

NEWBURY RIFFLE
STA 3+75

RESTORE STREAM
SEE NOTE 3
SEE SHEETS C-10 AND
C—11 FOR STREAM
RESTORATION DETAILS

NEWBURY RIFFLE
STA 9+69

RIPRAP PROTECTED
CHANNEL

RESTORATION PLAN NOTES:

(REFER TO SPECIFICATIONS FOR ADDITIONAL INFORMATION)

1. THE RESTORATION REQUIREMENTS SHOWN ON THE DRAWINGS ARE
CONCEPTUAL AND MAY BE ADJUSTED OR MODIFIED BASED ON SITE
CONDITIONS FOLLOWING COMPLETION OF MINE WASTE EXCAVATION. THIS
AREA SHALL BE RESTORED SUCH THAT THE AREA CAN BE CULTIVATED IN
THE FUTURE.

2. COMPLETION OF SITE RESTORATION SHALL CONFORM TO SECTION 02300
AND THE FOLLOWING CRITERIA:

- THE EXCAVATED AREAS SHALL BE BACKFILLED WITH CLEAN, SILTY CLAY
BACKFILL AND 6 INCHES OF IMPORTED ORGANIC TOPSOIL, AS REFERENCED
IN THE CONTRACTOR'S APPROVED BORROW MANAGEMENT PLAN. BORROW
SOURCES SHALL BE APPROVED BY EPA PRIOR TO SITE RESTORATION.
REFER TO SECTION 02140 FOR ADDITIONAL INFORMATION.

- SITE DRAINAGE PATTERNS SHALL GENERALLY CONFORM TO THE
DIRECTIONAL ARROWS AS SHOWN ON THE DRAWINGS.

- THE EXCAVATED AREAS SHALL BE REGRADED AS NECESSARY TO PROVIDE
POSITIVE SURFACE DRAINAGE, WITH CROSS SLOPES OF 1 TO 3 PERCENT
AND MATCH THE SURROUNDING GRADE.

- REFER TO TABLE 5 ON SHEET G-02 FOR ESTIMATED VOLUME OF IMPORTED
FILL AND TOPSOIL.

3. EXCAVATED AREA WITHIN THE CREEK CHANNEL FROM SW20TH STREET
TO STAR ROAD WILL NOT BE BACKFILLED WITH THE EXCEPTION OF THE
CONSTRUCTION OF NEWBURY RIFFLES AS SHOWN ON THE DRAWINGS.

4. SEED WITH WETLAND SEED MIX IN THE DESIGNATED AREAS, IN
ACCORDANCE WITH SECTION 02955, AND IN ACCORDANCE WITH
CONTRACTOR'S APPROVED NORTHWEST TRIBUTARY RESTORATION PLAN.
REFER TO SHEET G-05 FOR DELINEATION OF WETLAND AREAS.

5. REPLACE BARBED WIRE FENCE WITH LIKE MATERIALS, IN THE
PRE-CONSTRUCTION LOCATION, AND IN ACCORDANCE WITH SECTION 02830,
AS NEEDED.

6. REFER TO NOTES ON SHEET G-02 FOR ADDITIONAL INFORMATION.

RESTORATION PLAN
AREA 3 (TT-1, TC-2,
TX-2, TX-47)

FOR EPA USE IN PREPARING
CONTRACT DOCUMENTS

&EPA

U.S. Environmental
Protection Agency
Region 7

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SHEET
IDENTIFICATION

C-05

-------
MINE WASTE TO
BE REMEDIATED
BY OTHERS

TEMPORARY HAUL ROUTE
FOR CHAT DISPOSAL FROM
AREA 3 TO TC-3

CULTIVATED
FIELD

INITIAL LIMITS OF
CONSTRUCTION

EXCAVATE MINE WASTE
SEE NOTE 4 & 6

WHEAT

TEMPORARY HAUL ROAD
TO DISPOSAL AREA 3
SEE NOTE 3

FINES

MIXED BULL
ROCK/CHAT

MARSH/GRASS

FINES/GRASS

TX-7N-2

MIXED BULL
ROCK/CHAT

MISC. CONCRETE
DEBRIS

-MISC. CHAT
ALONG TRAIL

FINES/BARE

SITE ACCESS FROM
STAR ROAD
SEE NOTE 2

MARSH/SWAMP

REMOVE MINE
WASTE FROM ROAD
DRAINAGE DITCH

F'NES/c H„

IMPOUNDED WATER
SEE NOTES 7 AND 8

¦SITE ACCESS
FROM STAR ROAD
LOCKED GATE
SEE NOTE 2

BERM OF CHAT/FINES
ALONG FENCE

FOR EPA USE IN PREPARING
CONTRACT DOCUMENTS

&EPA

U.S. Environmental
Protection Agency
Region 7
Lenexa, Kansas

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SHEET
IDENTIFICATION

C-06

EXCAVATION PLAN NOTES:

(REFER TO SPECIFICATION FOR ADDITIONAL INFORMATION)

1. THE AREA 4 (TX-7 NORTH) MINE WASTE AREA CONTAINS DISCONTINUOUS
AREAS OF CHAT, TAILINGS, AND OTHER MINE WASTE MIXED WITH SOIL. THE
SURROUNDING SITE PROPERTY IS USED FOR AGRICULTURE.

2. SITE ACCESS ROAD IS VIA UNIMPROVED ACCESS ROADS FROM STAR ROAD
LOCATED ON THE SOUTHEASTERN AND SOUTHWESTERN EDGES OF THE
LIMITS OF CONSTRUCTION AS INDICATED ON THE CONTRACT DRAWING.
TRAFFIC CONTROL SHALL BE USED FOR ALL TRUCKS AND EQUIPMENT
ENTERING AND EXITING THE SITE IN ACCORDANCE WITH SECTION 02121.

3. AREA 4 IS LOCATED ADJACENT TO DISPOSAL AREA 3. THE EXISTING TRAIL
SHALL BE USED AS A TEMPORARY HAUL ROAD TO TC-3.

4. CONDUCT XRF ANALYSIS (FIELD XRF SCREENING WITH PORTABLE
INSTRUMENT) WITHIN THE INITIAL CONSTRUCTION LIMITS WHERE VISIBLE
MINE WASTE IS NOT PRESENT TO IDENTIFY AREA(S) REQUIRING
REMEDIATION. XRF SCREENING SHALL BE CONDUCTED ON A 50-FOOT GRID
IN ACCORDANCE WITH THE APPROVED QUALITY ASSURANCE PLAN AS
REQUIRED BY THE PERFORMANCE WORK STATEMENT. PROVIDE EPA WITH A
SITE PLAN SHOWING THE GRID LOCATIONS, XRF RESULTS, AND
INTERPRETED AREAS REQUIRING EXCAVATION. THE PROPOSED AREAS OF
EXCAVATION SHALL BE APPROVED BY EPA PRIOR TO EXCAVATION. THE
LIMITS OF CONSTRUCTION SHALL BE REVISED AS NECESSARY TO OBTAIN
ACCESS AND TO COMPLETE EXCAVATION OF ALL WASTE AND
CONTAMINATED SOIL.

5. FOR PURPOSES OF BIDDING, REFER TO TABLE 4 ON SHEET G-02 FOR
ESTIMATED WASTE AND CONTAMINATED SOIL VOLUMES. THE DEPTH OF
EXCAVATION SHALL BE BASED ON CONFIRMATION SAMPLING IN
ACCORDANCE WITH SECTION 02111.

6. EXCAVATE MINE WASTE IN ACCORDANCE WITH SECTION 02111.

EXCAVATED MINE WASTE AND CONTAMINATED SOIL FROM AREA 4 SHALL BE
DISPOSED IN ACCORDANCE WITH TABLE 3 ON SHEET G-02. THE FINAL
EXCAVATION SURFACE SHALL BE GRADED IN ACCORDANCE WITH SECTION
02111.

7. POND SHALL BE DEWATERED IN ACCORDANCE WITH THE CONTRACTOR'S
APPROVED DEWATERING AND SEDIMENT MANAGEMENT PLAN. REMOVE
VISIBLE MINE WASTE AND CONTAMINATED SOIL TO A DEPTH OF 1 FOOT
BELOW THE EXISTING GROUND SURFACE ELEVATION.

8. WATER FROM THE IMPOUNDMENT MAY BE EVAPORATED OR USED AS DUST
CONTROL SUPPRESSION IN CONTAMINATED MINE WASTE AREAS.
DEWATERING THIS POND MAY INCLUDE DISCHARGE OF WATER TO
DOWNGRADIENT AREAS THAT HAVE HISTORICALLY RECEIVED RUNOFF FROM
THESE WASTE AREAS.

9. REFER TO NOTES ON SHEET G-02 FOR ADDITIONAL INFORMATION.

TEST PIT TABLE

TEST PIT ID#

APPROX.
THICKNESS

OF MINE
WASTE (FT.)

TYPES OF MINE WASTE
ENCOUNTERED (ORDER AS
DEPTH INCREASES)

COMMENTS

TX-7N-1

2.75

CHAT

TX-7N-2

1.25

CHAT

POSSIBLE CLAY/SHALE TRANSITION AT
APPROXIMATELY 8.5'

TX-7N-3

0.8

TAILINGS

TX-7N-4

1.5

CHAT

SHALE ENCOUNTERED AT 7'

TX-7N-5

1.4

TAILINGS

XRF SCREENING RESULTS

SAMPLE ID#

DEPTH

(FT.)

LEAD

(MG/KG)

ZINC
(MG/KG)

CADMIUM
(MG/KG)

TX-7N-3

0.75-1.25

751

3390

4,0-4.25

130

151

< 12

EXCAVATION PLAN
AREA 4 (TX-7 NORTH)

-------
RESTORATION PLAN
AREA 4 (TX-7 NORTH)

RESTORATION PLAN NOTES:

(REFER TO SPECIFICATIONS FOR ADDITIONAL INFORMATION)

1. THE GRADING AND RESTORATION REQUIREMENTS SHOWN ON THE
DRAWINGS ARE CONCEPTUAL AND MAY BE ADJUSTED OR MODIFIED BASED
ON SITE CONDITIONS FOLLOWING COMPLETION OF MINE WASTE
EXCAVATION.

2. COMPLETION OF SITE RESTORATION SHALL CONFORM TO SECTION 02300
AND THE FOLLOWING CRITERIA:

- SITE DRAINAGE PATTERNS SHALL GENERALLY CONFORM TO THE
DIRECTIONAL ARROWS AS SHOWN ON THE DRAWINGS.

- EXCAVATED AREAS SHALL BE REGRADED AS NECESSARY TO PROVIDE
POSITIVE SURFACE DRAINAGE, WITH CROSS SLOPES OF 1 TO 3 PERCENT
AND MATCH THE SURROUNDING GRADE.

- EXCAVATED AREAS REQUIRING FILL TO PROVIDE POSITIVE SURFACE
DRAINAGE SHALL BE BACKFILLED WITH CLEAN, SILTY CLAY
BACKFILL AND 6-INCHES OF TOPSOIL AS REFERENCED IN THE
CONTRACTOR'S APPROVED BORROW MANAGEMENT PLAN. BORROW
SOURCES SHALL BE APPROVED BY EPA PRIOR TO SITE RESTORATION.

- REFER TO TABLE 5 ON SHEET G-02 FOR ESTIMATED VOLUMES OF
IMPORTED FILL AND TOPSOIL.

3. UNIMPACTED SOIL FOR USE AS FILL DURING FINAL GRADING OR COVER
MATERIAL FOR MINE WASTE CONSOLIDATION AREA COVER THROUGH OVER
EXCAVATION WITHIN THE DETENTION BASIN. UNIMPACTED SOIL SHALL
CONFORM TO THE REQUIREMENTS OF SECTION 02140.

4. RECONSTRUCT ROAD DRAINAGE DITCH AND DIRECT FLOW TO THE WEST.

5. REPLACE BARBED WIRE FENCE AND GATE WITH LIKE MATERIALS IN THE
PRE-CONSTRUCTION LOCATION, AND IN ACCORDANCE WITH SECTION 02830,
AS NEEDED.

6. SEED ALL DISTURBED AREAS WITH A NATIVE GRASS SEED MIXTURE IN
ACCORDANCE WITH SECTION 02921. SEED WITH WETLAND SEED MIX IN THE
DESIGNATED AREAS, IN ACCORDANCE WITH SECTION 02955. REFER TO
SHEET G-05 FOR DELINEATION OF WETLAND AREAS.

7. REFER TO NOTES ON SHEET G-02 FOR ADDITIONAL INFORMATION.

1" = 100'

50 0 100

FOR EPA USE IN PREPARING
CONTRACT DOCUMENTS

s&EPA

U.S. Environmental
Protection Agency
Region 7
Lenexa, Kansas

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SHEET
IDENTIFICATION

C-07

-------
POOL IMPOUNDMENT/ 1 >
BERM SEE NOTE 2 \pD-05J

BERM/RIFFLE
TIE-IN

NEWBURY RIFFLE
STA 37+38

STREAM Q.

37+00

33+00

MINE WASTE
CONSOLIDATION AREA
SEE SHEET C-02

DRAINAGE SWALE

' ' \ MAINTENANCE
iCD-01/ MONUMENT

DRAINAGE SWALE

DRAINAGE
LET DOWN

STRAW WATTLES

DIVERSION TERRACE

FOR EPA USE IN PREPARING
CONTRACT DOCUMENTS

XRF SCREENING RESULTS - TEST PIT TABLE

LEAD
(MG/KG)

ZINC
(MG/KG)

CADMIUM
(MG/KG)

CHAT W/ TRACE CLAY (SATURATED)

GRAY, SILTY CLAY WITH TRACE FINE SAND
AND ORGANICS

&EPA

U.S. Environmental
Protection Agency
Region 7

^nexa+

SHEET
IDENTIFICATION

C-08

2. TOP OF BERM IS TO BE TIED IN TO EL. 846'.

1. NEWBURY RIFFLE STATIONING INDICATES LOCATION OF RIFFLE CREST.
SEE DETAIL (SHEET CD-03) FOR ADDITIONAL INFORMATION.

NORTHWEST TRIBUTARY -
STREAM RESTORATION PLAN 1

NOTE:

(REFER TO SPECIFICATION FOR ADDITIONAL INFORMATION)

-------
MATCH LINE

FOR CONTINUATION SEE SHT C-10

NEWBURY RIFFLE
STA 22+29

STREAM

¦RIPRAP PROTECTED,
CHANNEL

MINE WASTE
CONSOLIDATION AREA
SEE SHEET C-02

STRAW WATTLES

DRAINAGE SWALE

FOR EPA USE IN PREPARING
CONTRACT DOCUMENTS

NOTE:

(REFER TO SPECIFICATION FOR ADDITIONAL
INFORMATION)

1. NEWBURY RIFFLE STATIONING INDICATES LOCATION
OF RIFFLE CREST. SEE DETAIL (SHEET CD-03) FOR
ADDITIONAL INFORMATION.

XRF SCREENING RESULTS - TEST PIT TABLE

SAMPLE ID#

LEAD

(MG/KG)

ZINC
(MG/KG)

CADMIUM

(MG/KG)

COMMENTS

TX-33-SS1

185

1016

TX-33-SS3

762

7687

DARK BROWN, SILTY
CLAY TOPSOIL

TX-33-SS4

673

10355

DARK BROWN, SILTY

CLAY TOPSOIL
(WATER ENTRY AT 6")

TX-33-SS5

324

5993

DARK BROWN, SILTY

CLAY TOPSOIL
(WATER ENTRY AT 6")

CK-20

199

2695

PRIMARILY CHAT

CK-102

213

6603

PRIMARILY CHAT

CK-104

1351

17400

114

GRAY SILTY CLAY
WITH TRACE FINE
SAND

&EPA

U.S. Environmental
Protection Agency
Region 7

^nexaj

SHEET
IDENTIFICATION

C-09

NORTHWEST TRIBUTARY -
STREAM RESTORATION PLAN 2

-------
mm, «¦»:

TWm®P
MMmmm

WiSr«K>;

"-^As V^W«%;
S^S\\ »f%

DRAINAGE SWALE

NEWBURY RIFFLE
STA 9+69

EXISTING CONCRETE
STRUCTURES TO REMAIN

MATCH LINE

STREAM

SHEET
IDENTIFICATION

C-10

NOTE:

(REFER TO SPECIFICATION FOR ADDITIONAL
INFORMATION)

1. NEWBURY RIFFLE STATIONING INDICATES LOCATION
OF RIFFLE CREST. SEE DETAIL (SHEET CD-03) FOR
ADDITIONAL INFORMATION.

NORTHWEST
TRIBUTARY - STREAM
RESTORATION PLAN 3

SAMPLE ID#

LEAD

(MG/KG)

ZINC
(MG/KG)

CADMIUM
(MG/KG)

-------
lisS)

<£. OF OVERFLOW
CHANNEL

3 - 30" 0
HDPE CULVERTS

DETENTION BASIN
OUTLET STRUCTURE
AND PLUNGE POOL

RIPRAP APRON
KDOT LIGHT SERIES
)i TON GRADATION

NEWBURY RIFFLE
STA 3+75

RIPRAP PROTECTED|
CHANNEL

STREAM

SHEET
IDENTIFICATION

NOTE:

(REFER TO SPECIFICATION FOR ADDITIONAL INFORMATION)

1. NEWBURY RIFFLE STATIONING INDICATES LOCATION OF RIFFLE CREST.
SEE DETAIL (SHEET CD-03) FOR ADDITIONAL INFORMATION.

NORTHWEST TRIBUTARY -
STREAM RESTORATION PLAN 4

-------
-MIN.0'-6" OVERLAP
AT JOINTS. AVOID
JOINTS UNLESS NECESSARY.

- STAKE OR POST
(2"x2"x5'-0" MIN. OAK OR 4"x4"x5,-0" MIN. PINE)
(5'-0" MIN. "U" OR "T" SECTION STEEL POST WITH
\mIN. 1.33 POUNDS/LINEAR FOOT WEIGHT)

tH®,

FIRST STAKE OR POST SHALL BE DRIVEN
TOWARD PREVIOUSLY LAID BALE

• FILTER FABRIC BURY TOE
OF FABRIC A MINIMUM
OF 0'-4".

ELEVATION

SILT FENCE NOTE:
A PREASSEMBLED SILT
FENCE MEETING THE
REQUIREMENTS OF THIS
DETAIL AND THE
SPECIFICATION IS
ACCEPTABLE IN LIEU OF A
FIELD CONSTRUCTED
FENCE.

INSTALL BALES WITH BINDINGS
ON SIDES OF BALES

SOIL COMPACTED OVER
FILTER FABRIC

SECTION

2"x2"x3'-0" MINIMUM WOOD STAKES (OAK OR PINE)
OR 3-0" MINIMUM "U" OR "T" SECTION STEEL POSTS
WITH MINIMUM 1.33 POUNDS/LINEAR FOOT WEIGHT

SILT FENCE

DETAIL f 1

NTS

STRAW BALE

DETAIL {2

NTS

VARIES
(2'-0" MIN.")

15-0"

SEED

SEE NOTE 5

FINISH GRADE

DRAINAGE DITCH

DETAIL r$

TEMPORARY DRAINAGE SWALE (TYP)

DETAIL /T

SEED
- SEE NOTE 5

SEED

SEE NOTE 5

-6" TOPSOIL LAYER
SEE NOTE 3

-12" SELECT FILL
SEE NOTE 4

-BACKFILL SUBGRADE

12" TOPSOIL LAYER
SEE NOTE 3

3' SELECT FILL
SEE NOTE 4

BACKFILL SUBGRADE

- 4" DIAMETER SCHEDULE 40 STEEL
PIPE FILLED WITH CONCRETE
SEE NOTE 6

>>/py>x

COVER SYSTEM PROFILE
(MINE WASTE CONSOLIDATION AREA)

DETAIL

COVER SYSTEM PROFILE (SELECT AREAS
OUTSIDE OF MINE WASTE CONSOLIDATION AREA)

DETAIL

MAINTENANCE MONUMENT

DETAIL (1

NTS

NOTES:

(REFER TO SPECIFICATIONS FOR ADDITIONAL INFORMATION)

1. CONSTRUCTION OF SILT FENCE AND STRAW BALES SHALL BE AS
SPECIFIED IN SECTION 02910.

2. CONSTRUCTION OF DIVERSION DITCHES AND SWALES SHALL BE AS
SPECIFIED IN SECTION 02910. DIVERSION DITCHES AND SWALES SHALL
HAVE A MAXIMUM CHANNEL SLOPE OF 2 PERCENT AND BE ADEQUATELY
COMPACTED TO PREVENT FAILURE.

3. TOPSOIL SHALL MEET THE REQUIREMENTS OF SECTION 02140.

4. SELECT FILL SHALL MEET THE REQUIREMENTS OF SECTION 02140.

5. SEED SHALL MEET THE REQUIREMENTS OF SECTION 02921.

6. MAINTENANCE MONUMENTS SHALL MEET THE REQUIREMENTS OF
SECTION 02140.

FOR EPA USE IN PREPARING
CONTRACT DOCUMENTS

s&EPA

U.S. Environmental
Protection Agency
Region 7
Lenexa, Kansas

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CD-01

-------
- STRAW WATTLE I

- GRADE TO DRAIN FROM
CENTER OF DIVERSION
TERRACE TO LET DOWN

SLOPE
VARIES

NOTES:

(REFER TO SPECIFICATIONS FOR ADDITIONAL INFORMATION)

1. EROSION CONTROL BLANKET SHALL CONFORM TO THE
REQUIREMENTS OF SECTION 02910.

2. ANCHOR EROSION CONTROL BLANKET IN ACCORDANCE WITH
MANUFACTURER'S RECOMMENDATIONS.

3. WATTLES SHALL CONFORM TO SECTION 02910. INSTALL
WATTLES IN ACCORDANCE WITH SECTION 02910. PERFORM
MAINTENANCE IN ACCORDANCE WITH SECTION 02910. WATTLES
SHALL BE INSPECTED REGULARLY, AND IMMEDIATELY AFTER A
RUNOFF PRODUCING RAINFALL, TO ENSURE THEY REMAIN
THOROUGHLY ENTRENCHED AND IN CONTACT WITH THE SOIL.

- EROSION CONTROL
BLANKET
SEE NOTE 1

- ANCHOR EROSION
CONTROL BLANKET
SEE NOTE 2

DIVERSION TERRACE CROSS SECTION (TYP)

DETAIL /T

EROSION CONTROL
SEE

EROSION CONTROL BLANKET
SEE NOTE 1

DRAINAGE LET DOWN

DETAIL

MINIMUM OF 10 FOOT
PER SECOND VELOCITY

SEE NOTE 2

DRAINAGE SWALE

DETAIL

INSTALL TRM WITH
PROTECTION PERFORMANCE
MINIMUM OF 10 FOOT
PER SECOND VELOCITY

ANCHOR EROSION
CONTROL BLANKET
SEE NOTE 2

-STRAW WATTLES
SEE NOTE 3

3/4" x 3/4" WOODEN
STAKE (TYPICAL)

2" MIN.
3" MAX.

STAGGER JOINTS
(TYPICAL)

STAKE AT EACH END
AND 4' MAX. O.C. ALONG
ENTIRE LENGTH

PLAN

ELEVATION

STRAW WATTLE

DETAIL ^4^\

FOR EPA USE IN PREPARING
CONTRACT DOCUMENTS

s&EPA

U.S. Environmental
Protection Agency
Region 7
Lenexa, Kansas

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IDENTIFICATION

CD-02

-------

- CREST ELEVATION
SEE NOTE 6

EXISTING STREAMBED

FILTER

y— EXISTING

—1

f~ FABRIC

/ STREAMBED

3' MIN. BOULDER OR
QUARRY STONE

INSERT SMALL DIAMETER STONE
BETWEEN BOULDERS/QUARRY
STONES

UNDISTURBED, IN-SITU
NATIVE SOIL MATERIAL

EXIST GROUND
SURFACE (TYP.)

PLAN

NOTES:

(REFER TO SPECIFICATIONS FOR ADDITIONAL INFORMATION)

1. RIPRAP SHALL CONFORM TO THE REQUIREMENTS OF SECTION 02209.

2. STREAM SHALL BE DISTURBED AS LITTLE AS POSSIBLE DURING CONSTRUCTION.

3. UPSTREAM FACE OF RIFFLES SHALL BE CONSTRUCTED AT 2' HORIZONTAL TO 1' VERTICAL SLOPE.
DOWNSTREAM FACE OF RIFFLES SHALL BE CONSTRUCTED AT 4' HORIZONTAL TO 1' VERTICAL SLOPE.
SHOULD THE DOWNSTREAM FACE EXTEND GREATER THAN 50' FROM THE CREST, THE FACE SHALL BE MADE
TO EXTEND 50' DOWNSTREAM AND AN EVEN SLOPE CONSTRUCTED FROM THE CREST DOWN.

4. UPSTREAM AND DOWNSTREAM WIDTHS SHALL EXTEND ACROSS THE CHANNEL BOTTOM.

5. MINIMUM THICKNESS OF RIPRAP SHALL BE 1.5 xD .

6. CREST OF NEWBURY RIFFLE SHALL EXTEND 18 INCHES ABOVE PRE-REMEDIATION CHANNEL INVERT
ELEVATION.

7. WHILE THE SLOPE OF THE EARTHEN BANKS SHOWN IN SECTION B OF THIS SHEET MAY VARY,
CONTRACTOR SHALL ENSURE THAT THE EARTHEN SLOPE IS SUITABLE FOR PLACEMENT OF FILTER FABRIC
SUCH THAT THE FABRIC IS STABLE.

POST REMEDIATION
GROUND
SURFACE (TYP.)

FILTER FABRIC

BANK RIPRAP -
KDOT LIGHT 24" GRADATION

1.5 x D50.

RIFFLE RIPRAP -
KDOT LIGHT 24" GRADATION

1.5 x Dsq.

NEWBURY RIFFLE

DETAIL /M

NTS

FOR EPA USE IN PREPARING
CONTRACT DOCUMENTS

s&EPA

U.S. Environmental
Protection Agency
Region 7
Lenexa, Kansas

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-------
EXIST GRADE (TYP)

1.5 x D50THICK
ON BANKS

I.SxDsoTHICKON
STREAMBED

EXTEND TO TOP OF BANK

TOP OF RIPRAP BLANKET
TO MATCH WITHIN 6" OF
EXISTING GRADE AT
CHANNEL BOTTOM

3 - 30" 0 HDPE
CULVERTS 120' LONG

- FLARED END SECTIONS
TO BE INSTALLED ON ALL
CULVERTS ON UPTREAM
AND DOWNSTREAM ENDS

GEOTEXTILE BLANKET
REFER TO SPECIFICATION
SECTION 02216

KDOT LIGHT SERIES
24" GRADATION

RIPRAP APRON

DETAIL f' 1

NTS

- EXIST CULVERT
UNDER STAR ROAD
INVERT EL. 831.5'

3:1 SIDE
SLOPE

1.5 X DsoTHICK LAYER OF

KDOT LIGHT SERIES 18" GRADATION

GEOTEXTILE BLANKET
REFER TO SPECIFICATION
SECTION 02216

3 - 30" 0 PIPES

DETENTION BASIN EMERGENCY SPILLWAY

DETAIL r*

NTS

PLUNGE POOL

PLAN

NTS

TOEWALL FOR
PERMANENT PLUNGE
POOLS

WOVEN
GEOTEXTILE

PLUNGE POOL

SECTION /X

(REFER TO SPECIFICATIONS FOR ADDITIONAL INFORMATION)

1. PRIOR TO CONSTRUCTION OF DAM, EXCAVATION SHALL BE COMPLETED TO EXPOSE NATIVE
SOILS COMPETENT ENOUGH TO STRUCTURALLY SUPPORT THE DAM.

2. USE SPECIFIED CLASS OF RIPRAP. AS SHOWN ON DRAWINGS.

3. USE WOVEN GEOTEXTILE AS SPECIFIED IN SPECIFICATION SECTION 02216, AND PROTECT
FROM PUNCHING, CUTTING, OR TEARING. REPAIR ANY DAMAGE OTHER THAN AN OCCASIONAL
SMALL HOLE BY PLACING ANOTHER PIECE OF GEOTEXTILE OVER THE DAMAGED PART OR BY
COMPLETELY REPLACING THE GEOTEXTILE. PROVIDE A MINIMUM OF ONE FOOT OVERLAP FOR
ALL REPAIRS AND FOR JOINING TWO PIECES OF GEOTEXTILE.

4. PREPARE THE SUBGRADE FOR THE PLUNGE POOL. COMPACT ANY FILL REQUIRED IN THE
SUBGRADE TO A DENSITY OF APPROXIMATELY THAT OF THE SURROUNDING UNDISTURBED
MATERIAL.

5. EMBED THE GEOTEXTILE A MINIMUM OF 4 INCHES AND EXTEND THE GEOTEXTILE A MINIMUM
OF 6 INCHES BEYOND THE EDGE OF THE SCOUR HOLE.

6. STONE FOR THE PLUNGE POOL MAY BE PLACED BY EQUIPMENT. CONSTRUCT TO THE FULL
COURSE THICKNESS IN ONE OPERATION AND IN SUCH A MANNER AS TO AVOID DISPLACEMENT
OF UNDERLYING MATERIALS. DELIVER AND PLACE THE STONE FOR THE PLUNGE POOL IN A
MANNER THAT WILL ENSURE THAT IT IS REASONABLY HOMOGENEOUS WITH THE SMALLER
STONES AND SPALLS FILLING THE VOIDS BETWEEN THE LARGER STONES. PLACE STONE FOR
THE PLUNGE POOL IN A MANNER TO PREVENT DAMAGE TO THE GEOTEXTILE. HAND PLACE TO
THE EXTENT NECESSARY.

7. AT THE PLUNGE POOL OUTLET, PLACE THE STONE SO THAT IT MEETS THE EXISTING GRADE.

8. RIPRAP SHALL CONFORM TO THE REQUIREMENTS OF SECTION 02209.

DETENTION BASIN OUTLET STRUCTURE

DETAIL /T

NTS

POST MINE
WASTE REMOVAL
GRADE (TYP)

POST MINE WASTE -

POST MINE WASTE
REMOVAL GRADE (TYP)

DETENTION BASIN EMERGENCY SPILLWAY CHANNEL

DETAIL /T

NTS

STREAM UPSTREAM OF DETENTION BASIN

DETAIL r*

NTS

NOTE:

EXISTING DITCH TO BE RECONSTRUCTED WITHIN MINE
WASTE REMOVAL AREA AND NO EARTHWORK SHALL BE
COMPLETED OUTSIDE OF PROJECT BOUNDARIES.

FOR EPA USE IN PREPARING
CONTRACT DOCUMENTS

s&EPA

U.S. Environmental
Protection Agency
Region 7
Lenexa, Kansas

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KDOT LIGHT SERIES

KDOT LIGHT SERIES

ELEVATION 846'

RIPRAP KDOT LIGHT SERIES FACING
GRADATION 1.5' THICK LAYER

/—EXIST. GRADE (TYP)

ELEVATION 846'

TIE IN TO EXISTING GROUND-

POOL IMPOUNDMENT BERM

DETAIL

NTS

ELEVATION 846'
EXIST. GRADE (TYP)

EXISTING

STREAMBED

ELEVATION

BERM/RIFFLE TIE-IN

DETAIL

EXIST. CHANNEL
BOTTOM (TYP)

TYPICAL CREEK CHANNEL EXCAVATION/RESTORATION

DETAIL

NTS

NOTES:

1. CONDUCT XRF ANALYSIS (FIELD XRF SCREENING) WITH PORTABLE
INSTRUMENT) LEFT AND RIGHT OF CREEK CHANNEL TO ESTABLISH LIMITS OF
EXCAVATION. SAMPLES FOR XRF ANALYSIS SHALL BE COLLECTED ALONG
TRANSECTS SPACED 50 FEET APART (E.G., STATIONS 0+50, 1+00, 1+50,...).

SOIL SAMPLES FOR ANALYSIS SHALL BE SPACED 10 FEET ON-CENTER ALONG
EACH TRANSECT. ALL SAMPLING AND ANALYSIS SHALL BE IN ACCORDANCE
WITH THE APPROVED QUALITY ASSURANCE PLAN REQUIRED BY THE
PERFORMANCE WORK STATEMENT. THE CONTRACTOR'S PROPOSED LIMITS
OF EXCAVATION SHALL BE APPROVED BY EPA PRIOR TO EXCAVATION.

2. THE DEPTH OF EXCAVATION IS EXPECTED TO VARY FROM
APPROXIMATELY 6 TO 18 INCHES. THE FINAL DEPTH OF EXCAVATION SHALL
BE DETERMINED IN THE FIELD BASED ON CONFIRMATION SAMPLING
CONDUCTED BY THE CONTRACTOR.

3. THE EXCAVATED AREAS LEFT AND RIGHT OF THE CREEK CHANNEL SHALL
BE BACKFILLED WITH CLEAN FILL (AS APPROVED BY EPA) AND TOPSOIL
(MINIMUM 6 INCHES) SPACED TO WITHIN 6 INCHES OF THE PRE-EXCAVATION
TOPOGRAPHY AND SLOPED TO ACHIEVE POSITIVE SURFACE DRAINAGE
TOWARDS THE CREEK CHANNEL.

4. EXCAVATION ALONG THE BOTTOM OF THE CREEK CHANNEL IS REQUIRED
TO REMOVE MINE WASTE AND IMPACTED SEDIMENTS. FOR PURPOSES OF
BIDDING, THE CONTRACTOR SHALL ASSUME EXCAVATION OF UP TO 6 INCHES
OF MINE WASTE AND 12 INCHES OF IMPACTED SEDIMENT. THE DEPTH OF
EXCAVATION OF IMPACTED SEDIMENT SHALL BE MEASURED FROM THE
EXISTING CHANNEL BOTTOM. THE ACTUAL DEPTH OF EXCAVATION MAY BE
REDUCED IN THE FIELD BASED ON THE ABSENCE OF MINE WASTE AND/OR
THE PRESENCE OF BEDROCK AT SHALLOW DEPTHS. DURING EXCAVATION,
SOIL SAMPLES FOR XRF ANALYSIS SHALL BE COLLECTED AND ANALYZED BY
THE CONTRACTOR TO GUIDE DECISIONS BY EPA ON THE FINAL DEPTH OF
EXCAVATION. THE SOIL SAMPLES SHALL BE COLLECTED ALONG THE
CENTER-LINE OF THE CREEK CHANNEL AT 50 FOOT INTERVALS (STATIONS
0+50, 1+00, 1+50,...). WHEN EXCAVATION IS COMPLETED, THE CREEK
CHANNEL SHALL BE FLAT BOTTOMED AS SHOWN ON THE TYPICAL DETAIL.

5. FOLLOWING EXCAVATION OF THE BOTTOM OF THE CHANNEL, THE
EXISTING SIDE SLOPES SHALL BE EXCAVATED TO REMOVE A MINIMUM OF 6
INCHES OF MATERIAL AND/OR TO ACHIEVE A MAXIMUM SLOPE OF 2.5
HORIZONTAL TO 1 VERTICAL. WHEN EXCAVATION OF THE SIDE SLOPES IS
COMPLETED, THE SIDE SLOPES SHALL BE SMOOTH AND UNIFORM IN
CROSS-SECTION TO RECEIVE RIPRAP, EROSION CONTROL MATERIALS, AND
SEED PLACEMENT WITHIN THE AREAS SHOWN ON THE DRAWINGS.

FOR EPA USE IN PREPARING
CONTRACT DOCUMENTS

s&EPA

U.S. Environmental
Protection Agency
Region 7
Lenexa, Kansas

h 8

Q HI 3 <
Z o CO w
=> in a: 5

£ z H

o 5

:r. < :

q i tt I

O O o O

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