annual ccr monofill inspection - berkshire hathaway energy · 2017-04-18 · number chapter title...

Annual CCR Monofill Inspection

MidAmerican Energy Company, Walter Scott, Jr.

Energy Center

Final January 18, 2016

Annual CCR Monofill Inspection

Prepared for

MidAmerican Energy Company, Walter Scott, Jr. Energy Center

Council Bluffs, Iowa

Final January 18, 2016

Prepared by

Burns & McDonnell Engineering Company, Inc. Kansas City, Missouri

COPYRIGHT © 2016 BURNS & McDONNELL ENGINEERING COMPANY, INC.

INDEX AND CERTIFICATION

MidAmerican Energy Company, Walter Scott, Jr. Energy Center Annual CCR Monofill Inspection

Report Index Chapter Number Number Chapter Title of Pages

1.0 Summary of Objectives 1 2.0 Results of Inspection 4 3.0 Recommended Remedial Action 1 4.0 Limitations of Report 1 Appendix A CCR Monofill Inspection Checklist and Photo Log 8 Appendix B Survey Results 2 Appendix C Construction Drawings 15 Appendix D Excerpt from CCR Rule (§257.84) 1

Certification

I hereby certify, as a Professional Engineer in the State of Iowa, that the information in this document was assembled under my direct personal charge. This report is not intended or represented to be suitable for reuse by the MidAmerican Energy Company, Walter Scott, Jr. Energy Center or others without specific verification or adaptation by the Engineer.

Nathan Textor, P.E.

Date: f̂ ft/lb

Nathan Textor License Number 23013

My license renewal date is December 31, 2016

Pages or sheets covered by this seal: As noted above.

NATHAN TEXTOR !£:

23013

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Walter Scott – CCR Monofill Inspection Table of Contents

MidAmerican Energy Company TOC-1 Burns & McDonnell

TABLE OF CONTENTS

Page No.

1.0 SUMMARY OF OBJECTIVES .......................................................................... 1-1

2.0 RESULTS OF INSPECTION ............................................................................. 2-1 2.1 Description of Monofill ....................................................................................... 2-1 2.2 Review of Existing Information ........................................................................... 2-2 2.3 Visual Inspection ................................................................................................. 2-2 2.4 Approximate Volume of CCR in the Monofill .................................................... 2-3 2.5 Changes in the Monofill....................................................................................... 2-3 2.6 Signs of Structural Weakness .............................................................................. 2-4

3.0 RECOMMENDED REMEDIAL ACTION ........................................................... 3-1

4.0 LIMITATIONS OF REPORT .............................................................................. 4-1

APPENDIX A – CCR MONOFILL INSPECTION CHECKLIST AND PHOTO LOG

APPENDIX B - SURVEY RESULTS

APPENDIX C - CONSTRUCTION DRAWINGS

APPENDIX D - EXCERPT FROM CCR RULE (§257.84)

Walter Scott – CCR Monofill Inspection List of Abbreviations

MidAmerican Energy Company i Burns & McDonnell

LIST OF ABBREVIATIONS

Abbreviation Term/Phrase/Name

CCR Coal Combustion Residual

EPA Environmental Protection Agency

IDNR Iowa Department of Natural Resources

MEC MidAmerican Energy Company

RCRA Resource Conservation and Recovery Act

U.S.C. United States Code

WSEC Walter Scott, Jr. Energy Center

MWH MWH Americas, Inc.

HDR HDR, Inc.

Walter Scott – CCR Monofill Inspection Summary of Objectives

MidAmerican Energy Company 1-1 Burns & McDonnell

1.0 SUMMARY OF OBJECTIVES

On April 17, 2015, the Environmental Protection Agency (EPA) issued the final version of the Federal

Coal Combustion Residual (CCR) Rule to regulate the disposal of coal combustion residual materials

generated at coal-fired units. The rule is administered as part of the Resource Conservation and Recovery

Act [RCRA, 42 United States Code (U.S.C.) §6901 et seq.], using the Subtitle D approach.

MidAmerican Energy Company (MEC) is subject to the CCR Rule and therefore must have a

Professional Engineer conduct an annual inspection on all CCR Monofills in accordance with 40 CFR

Section 257.84. Burns & McDonnell conducted the 2015 annual inspection of the Walter Scott, Jr.

Energy Center (WSEC) Monofill on October 23, 2015, on behalf of MEC. This report contains the results

and observations of the inspection, as well as any recommended remedial actions. This annual inspection

is the first annual inspection required under the CCR Rule.

Walter Scott – CCR Monofill Inspection Results of Inspection


2.0 RESULTS OF INSPECTION

The primary objective of the annual inspection as described in Section 257.84(b)(1) of the CCR Rule is to

“ensure that the design, construction, operation and maintenance of the CCR unit is consistent with

recognized and generally accepted good engineering standards”. The 2015 annual inspection included

reviewing existing information on the CCR Monofill including any available previous inspections

performed, construction drawings and a current survey. A visual inspection of the CCR Monofill was

also conducted, and included examining the toe and crest of all slopes, side slopes, hydraulic structures

and other features for any signs of distress or deficient operation of the CCR Monofill. The observations

made from the review of existing information and the visual inspection are provided below.

2.1 Description of Monofill

The WSEC CCR Monofill is located south of the plant, along the north side of Applewood Road.

Construction drawings prepared by MWH Americas, Inc. (MWH) and HDR, Inc. (HDR) were reviewed

for a better understanding of the Monofill design and geometry. Cell 1 was constructed in 2007, Cells 2

and 3 were constructed in 2008, Cell 4 was constructed in 2010, Cell 5 was constructed in 2011, and Cell

6 was constructed in 2012. Cell 7 was under construction at the time of the inspection, and is scheduled

under existing construction contract to be completed in 2016. The final cover design slope is 4H:1V. The

liner system is a geocomposite liner made of a two (2) feet thick layer of compacted clay with a

permeability of 1 x 10-7 centimeters per second or less overlain by a 60 mil high density polyethylene

geomembrane overlain by a geocomposite drainage layer overlain by a two (2) feet thick layer of leachate

collection medium overlain by a geotextile fabric. Leachate is collected by leachate collection pipes

within the drainage layer on top of the liner system. It is then pumped out of the pipes into a lined

leachate holding pond. Leachate is generally used for dust suppression on the Monofill. As a backup

disposal option, MEC entered into a contractual agreement with the City of Council Bluffs Wastewater

Treatment Plant, immediately north of the Monofill. Documentation of this arrangement was submitted to

IDNR on April 10, 2009 and incorporated into the Operating Permit as Permit Amendment #9.

Notification of the renewal agreement was provided to the IDNR January 16, 2014.

At the time of inspection, all cells were receiving CCR. The full side slopes of Cells 1, 2, 3N and 3S and

a portion of the east slopes of Cells 4, 5, and 6 have been capped with the final cover system. The final

cover system is made of two feet of compacted soil overlain by 18-inches of topsoil capable of growing

vegetation. All other slopes were uncovered.



The Monofill permit application and construction drawings prepared by MWH were reviewed and

accepted by the Iowa Department of Natural Resources (IDNR). Subsequent amendments to the permit

application for additional cell construction (Cells 4, 5, 6, and 7) were prepared by HDR and submitted to

the IDNR for approval. The MWH and HDR construction drawings reviewed appeared to be in general

accordance with conventional Monofill standards.

2.2 Review of Existing Information

Section 257.84(b)(1)(i) of the CCR Rule requires that previous inspections are to be reviewed. Inspection

reports reviewed included the seven-day inspection reports from October 16, 2015 and October 23, 2015.

These inspections noted some minor erosion and animal burrows. The seven-day inspection report from

October 30, 2015 was also later reviewed to confirm remediation activities performed by MEC. Since

this is the first annual inspection as required by the CCR Rule, no previous annual inspections were

available for review. Construction drawings were also reviewed to better understand the Monofill design

and geometry.

2.3 Visual Inspection

Section 257.84(b)(1)(ii) of the CCR Rule requires a visual inspection of the CCR Monofill be performed.

The visual inspection was performed by Burns & McDonnell on October 23, 2015. The visual inspection

involved walking the perimeter of the toe of the Monofill, across the face of the slopes in a diagonal

pattern, along the upper working area and along the crest. An inspection of the leachate holding pond was

also performed. The inspector looked for the following:

Surface cracking along crest or slopes indicating possible movement;

Misalignment of linear features of Monofill, such as the crest or ditches, indicating possible movement;

Displacements (slides, slumps, slips and sloughs) indicating slope instability;

Animal burrows in cover system that creates a preferential flow path for water;

Erosion along the berm, cover system or uncovered CCR material;

CCR outside of permitted limits;

Seepage of leachate from the Monofill;

Issues with leachate system including evidence of piping or inadequate flow indicating clogging of system;

Inadequate slope protection such as sparse or patchy vegetation;



Excessive and/or woody vegetation along the cover system;

Debris or mounded CCR on the Monofill that could lead to unaccounted loading;

Settlement (or depressions) in the Monofill that could indicate internal piping of CCR or karstic subsurface;

Outlet/overflow structure in proper working order including no evidence of piping, clear of debris that may block flow, or adequate erosion protection;

Drainage features in proper working order including appropriate drainage of surface water;

Signs of vandalism on the Monofill.

Based on observations at the time of the visual inspection, there was no indication of structural

deficiencies in the Monofill such as slope instability, excessive settlement, cracking, displacements, or

misalignment. The leachate pond appeared to be well maintained with rip-rap slopes and no vegetation

growth on the slopes. No excessive and/or woody vegetation, debris or signs of vandalism were

observed. No excessive sediment was noted in the leachate sump. No CCR was observed outside of the

permitted boundaries.

2.4 Approximate Volume of CCR in the Monofill

Section 257.84(b)(2)(ii) of the CCR Rule also requires that the approximate volume of CCR in the

Monofill be estimated as part of this annual inspection report. To determine the volume, MEC contracted

licensed land surveyors at HGM Associates, Inc. on October 19, 2015 to conduct a survey of the monofill.

The survey provided general dimensions and slopes of the Monofill. Side slopes have a slope of 4H:1V.

The upper elevation (referenced from mean sea level) of the Monofill varies between 1005 feet and 1015

feet with the lower side being on the north end of Cell 6 and the high side being on the south end of Cells

2 and 3S. Total CCR in the Monofill as determined by HGM Associates, Inc. is estimated to be

2,552,878 cubic yards.

2.5 Changes in the Monofill

Section 257.84(b)(2)(i) of the CCR Rule requires that any changes in geometry be noted since the

previous annual inspection and Section 257.84(b)(2)(iv) of the CCR Rule requires that any changes that

may affect the stability or operation of the CCR Monofill be discussed since the previous annual

inspection. However, since this is the first annual inspection as required by the CCR Rule, there is no

basis for a discussion regarding any possible changes. The geometry appears to be generally in

accordance with the construction drawings.



2.6 Signs of Structural Weakness

Section 257.84(b)(2)(iii) of the CCR Rule requires any appearances of actual or potential structural

weakness or conditions that could disrupt or potentially disrupt operation and safety of the CCR be noted

in the inspection report. During the inspection, there was no indication of structural deficiencies in the

Monofill such as slope instability, excessive settlement, cracking, displacements, or misalignment.

There were some deficient conditions observed. Along the eastern portion of the south face of Cell 1,

dormant vegetation was observed in patches. Along the east face of Cells 1 and 2, some patchy

vegetation was observed. Based on conversations with MEC personnel, this area has been recently

covered and grass planted. In areas with patchy vegetation, no erosion was noted.

Along the upper working area of Cell 4, there were depressed areas where surface water was ponding.

Minor depressions with diameters less than two (2) feet and one animal burrow were also noted on the

face of Cells 1, 2 and 3S. These areas were marked by MEC personnel to be backfilled by an MEC

subcontractor.

Walter Scott – CCR Monofill Inspection Recommended Remedial Action


3.0 RECOMMENDED REMEDIAL ACTION

Based on observations made at the site during the inspection and documented in Appendix A, remediation

measures to correct insufficient vegetative cover, minor depressions and ponded water on the working

area will need to be performed. The following remedial actions are recommended for the WSEC CCR

Monofill:

Backfilling of minor depression and animal burrows will be necessary. MEC personnel noted

this would be done and the October 30, 2015 seven-day inspection report notes it was performed.

For areas with patchy vegetation, re-seeding will need to be performed. Based on discussions

with MEC personnel, re-seeding of areas with patchy vegetation along the east sides of Cell 1 and

2 will occur next spring.

For areas with dormant vegetation along the south side of Cell 1, re-seeding of this area will be

required. MEC noted that overseeding of these areas to push out the dormant vegetation is on-

going and will continue next spring.

For areas where water is ponding on top the CCR Monofill in Cell 4, minor grading should be

performed to ensure adequate stormwater drainage.

Continual monitoring of the leachate system should be performed to confirm there is consistent

flow volume and no clogging of the leachate system is occurring. This monitoring is a part of the

current Leachate Control System Plan and is being performed by MEC. Consistent flow has been

observed from the leachate system.

Walter Scott – CCR Monofill Inspection Limitations of Report


4.0 LIMITATIONS OF REPORT

This report is based on observations made of features that could be visually inspected at the time of the

inspection, construction drawings and survey information provided by MEC. Features not visible at the

surface including liner, leachate collection system, final cover, etc. could not be observed or assessed.

Construction drawings prepared by MWH and HDR and accepted by the IDNR were reviewed to gain an

understanding of the Monofill design and geometry. No assessment or confirmation of the design was

performed as part of this inspection. No subsurface information, construction quality assurance

documents or operational placement records were reviewed as part of this inspection. An assessment of

the adequacy and state of any groundwater monitoring wells, gradients or water quality was not a part of

this inspection.

Any recommended remedial action or further monitoring noted in this report is assumed to be performed

by MEC in a timely fashion and monitored by MEC on the required seven-day inspection schedule

currently being performed.

APPENDIX A – CCR MONOFILL INSPECTION CHECKLIST AND PHOTO LOG

EPA - Disposal of Coal Combustion Residuals (CCR) from Electric Utilities Final Rule Regulatory Compliance Inspection - 40 CFR § 257.84 CCR Monofills Annual Inspection Checklist Form

Facility Name MidAmerican Energy Company-Walter Scott, Jr. Energy Center

CCR Landfill Name Monofill

Date of Annual Inspection 10/23/2015

Date of Prior Annual Inspection n/a

Name of Qualified Inspector (performing inspection) (print) Nathan Textor, P.E.

(signature)

Weather Conditions c

Overcast, light rain, 60 degrees

Inspector Observations

Were Any Issues

Observed in Current

Inspection?

Status as Compared to Last Inspection

Condition Items (Identify location of observation on attached site plan and approximate dimensions of any issues noted. Additional comments should be included at bottom of inspection, as needed.)

OD 0 >-

o z T

o B

e M

on

itore

d

Sim

ilar

Impro

ved

De

terio

rate

d

Unkn

ow

n

Erosion Limited areas with patchy/dead vegetation on south side of Cells 3S and 1 and east side of Cells 1 and 2

X

2 Woody Vegetation X =3 O =3 Trees X

CO Berm Slide/Slough X

Animal Burrows One burrow found on east side of Cell 2 X

Cracks X

Dra

inage

Ditches (Overtopping and/or Erosion)

Some ponding of water found on working area of CCR monofill

X

03 C o

Waste Material Outside Unit Footprint

X

cd j— 03 Q O

Monitoring Wells (Managed or Operating Improperly)

X

Page 1 of 2

EPA - Disposal of Coal Combustion Residuals (CCR) from Electric Utilities Final Rule Regulatory Compliance Inspection – 40 CFR § 257.84 CCR Monofills Annual Inspection Checklist Form

Page 2 of 2

Leachate Collection System (Managed or Operating Improperly)

X

�� Place a checkmark here if photographic log and photos are attached to this inspection form. Comments:

Some minor depressions and one animal burrow were noted along the outer slope of Cells 1, 2 and 3N

were noted. They were limited in nature and were marked by Keith Jackson of MEC to be backfilled by

an MEC subcontractor. Some patchy and dead vegetation was observed along the outer slope of Cells 1

and 2. Keith Jackson of MEC noted that further seeding was planned in these areas. No erosion was

noted in these areas on the cover. Some ponding of water was noted on the upper working area.

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ntextor

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1/11/2016 - per further discussions with MEC, it was determined that vegetation noted as "dead" is more appropriately described as "dormant". Any references to "dead vegetation" in this checklist should be considered "dormant vegetation".

Ponded water

Dead vegetation

Some patchy vegetation

IMG 574

IMG 577

IMG 587 IMG 585

IMG 592

IMG 593

IMG 596

IMG 597

IMG 599

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Walter Scott, Jr. Energy Center - CCR Landfill Inspection BMcD Project No. 86617

ntextor

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Prepared by: Nathan Textor, P.E. Date: 11/20/2015

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North

EPA - Disposal of Coal Combustion Residuals (CCR) from Electric Utilities Final Rule Regulatory Compliance Inspection – 40 CFR § 257.84 CCR Monofill Photographic Log

Photograph Number: IMG-0574

Description of Photograph: Looking down western side of Cell 6 outer berm, facing south

Facility Name Walter Scott, Jr. Energy Center

CCR Landfill Name Monofill

Date of Inspection 10/23/2015

Date of Last Prior Inspection n/a

Name of Qualified Inspector (performing inspection)

(print) Nathan Textor, P.E.

(signature)

Weather Conditions Overcast, light rain, 60 degrees



Description of Photograph: Looking up CCR landfill embankment in Cell 5, no erosion noted, facing east


Description of Photograph: Area of dead vegetation on south side of Cell 1, facing east



Description of Photograph: Looking down south side of Cell 3S, facing east


Description of Photograph: Looking along east side of Cell 5, facing north



Description of Photograph: Looking across north side of Cell 6, facing west


Description of Photograph: Upper working area, facing south, from Cell 5 towards Cell 1



Description of Photograph: Photo of upper working area, some ponding of water, from Cell 3N towards Cell 4, facing north


Description of Photograph: Photo of leachate holding pond to west of Cell 3N, facing northwest

APPENDIX B - SURVEY RESULTS

Current Tonnage PlacedMonth/Year WS 1 & 2 WS 3 WS 4 Total in Monofill (Accum.)2007 Total - - 156,261.66 156,261.66 156,261.662008 Total 20,280.88 65,342.12 270,035.21 355,658.21 511,919.872009 Total 18,403.47 85,492.86 293,670.74 397,567.07 909,486.942010 Total 24,149.66 112,928.28 294,231.71 431,309.65 1,340,796.592011 Total 21,358.59 79,756.34 288,445.38 389,560.31 1,730,356.902012 Total 14,020.65 84,007.46 298,012.36 396,040.47 2,126,397.372013 Total 15,518.85 84,961.94 284,789.31 385,270.09 2,511,667.472014 Total 11,004.84 126,532.85 254,274.97 391,812.66 2,903,480.122015 Total 2,390.46 93,068.56 209,951.37 305,410.38 3,208,890.512016 Total - - - - 3,208,890.51

Tons Placed in Monofill (1)

APPENDIX C - CONSTRUCTION DRAWINGS

EXISTING CONDITIONS

HDR Engineering, Inc.

COUNCIL BLUFFS IOWA

WALTER SCOTT ENERGY CENTER

CCR MONOFILL - CELL 6

RECORD DRAWING

THIS RECORD DRAWING HAS BEEN PREPARED, IN

PART ON THE BASIS OF UNVERIFIED INFORMATION

COMPILED AND FURNISHED BY OTHERS TO THE

PREPARER WHO IS NOT RESPONSIBLE FOR ANY

INACCURACIES, ERRORS OR OMISSIONS WHICH MAY

HAVE BEEN INCORPORATED INTO THE DOCUMENT

AS A RESULT.

DAYLIGHT TO TOP OF CAP (AT EDGE OF INNER SWALE)NUMBER NORTHING EASTING ELEVATION DESCRIPTION

C1 431546.87 997598.69 976.14 DAYLIGHT CLAYC2 431545.31 997347.96 974.75 DAYLIGHT CLAYC3 431542.82 997147.67 973.32 DAYLIGHT CLAYC4 431579.64 997093.97 972.73 DAYLIGHT CLAYC5 431807.96 997097.35 973.87 DAYLIGHT CLAYC6 431999.83 997098.10 974.37 DAYLIGHT CLAYC7 432040.62 997097.50 974.24 DAYLIGHT CLAYC8 432268.13 997100.09 974.90 DAYLIGHT CLAYC9 432477.78 997104.15 975.69 DAYLIGHT CLAY

C10 432517.62 997127.36 975.95 DAYLIGHT CLAYC11 432513.87 997403.11 976.22 DAYLIGHT CLAYC12 432510.84 997650.60 976.19 DAYLIGHT CLAYC13 431547.05 997100.35 972.84 DAYLIGHT CLAYC14 432022.76 997104.54 976.00 DAYLIGHT CLAY

TOE OF 2:1 SLOPE (TOP OF ASH)G21 431562.56 997598.19 976.14 TOE 2:1 SLOPEG22 431560.11 997347.67 974.75 TOE 2:1 SLOPEG23 431557.51 997148.25 973.32 TOE 2:1 SLOPEG24 431580.99 997109.38 972.73 TOE 2:1 SLOPEG25 431807.86 997112.30 973.87 TOE 2:1 SLOPEG26 431999.88 997113.32 974.37 TOE 2:1 SLOPEG27 432040.82 997113.22 974.24 TOE 2:1 SLOPEG28 432267.81 997115.80 974.90 TOE 2:1 SLOPEG29 432476.95 997119.84 975.69 TOE 2:1 SLOPEG30 432503.13 997127.43 975.95 TOE 2:1 SLOPEG31 432499.73 997402.91 976.22 TOE 2:1 SLOPEG32 432496.70 997650.51 976.19 TOE 2:1 SLOPEG33 431557.34 997109.62 972.84 TOE 2:1 SLOPEG34 432023.47 997115.72 976.00 TOE 4:1 SLOPE

TOP OF 2:1 SLOPE (TOP OF ASH)E41 431566.29 997597.66 977.99 TOP 2:1 SLOPEE42 431562.91 997347.68 976.15 TOP 2:1 SLOPEE43 431560.20 997147.70 974.67 TOP 2:1 SLOPEE44 431580.00 997112.80 974.44 TOP 2:1 SLOPEE45 431807.84 997115.26 975.34 TOP 2:1 SLOPEE46 431999.84 997116.54 975.98 TOP 2:1 SLOPEE47 432040.87 997116.93 976.10 TOP 2:1 SLOPEE48 432267.69 997119.51 976.76 TOP 2:1 SLOPEE49 432476.56 997123.55 977.55 TOP 2:1 SLOPEE50 432497.31 997129.48 979.01 TOP 2:1 SLOPEE51 432493.59 997402.83 979.29 TOP 2:1 SLOPEE52 432490.56 997650.47 979.26 TOP 2:1 SLOPE

RANDOM CONTROL POINTSR61 432031.44 997143.80 983.00 ON 4:1 SLOPER62 432016.45 997143.65 983.00 ON 4:1 SLOPER63 432031.73 997115.81 976.00 ON 4:1 SLOPER64 432016.73 997115.65 976.00 ON 4:1 SLOPER65 431574.93 997619.22 981.00 TOP 2:1 SLOPER66 431554.73 997617.51 976.50 TOP 2:1 SLOPER67 431566.21 997592.05 977.95 TOP 2:1 SLOPER68 431588.95 997651.51 985.00 4:1 SLOPER69 431591.61 997622.52 985.00 4:1 SLOPER70 431594.40 997592.03 985.00 4:1 SLOPE

CELL 6 LINER PLAN


COUNCIL BLUFFS IOWA



RECORD DRAWING







AS A RESULT.

TYPICAL LINER AND LEACHATE

COLLECTON DETAILS


COUNCIL BLUFFS IOWA



RECORD DRAWING







AS A RESULT.

APPENDIX D - EXCERPT FROM CCR RULE (§257.84)

21482 Federal Register / Vol. 80, No. 74 / Friday, April 17, 2015 / Rules and Regulations

following the date of initial receipt of CCR in the CCR unit.

(4) Frequency of inspections. (i) Except as provided for in paragraph (b)(4)(ii) of this section, the owner or operator of the CCR unit must conduct the inspection required by paragraphs (b)(1) and (2) of this section on an annual basis. The date of completing the initial inspection report is the basis for establishing the deadline to complete the first subsequent inspection. Any required inspection may be conducted prior to the required deadline provided the owner or operator places the completed inspection report into the facility’s operating record within a reasonable amount of time. In all cases, the deadline for completing subsequent inspection reports is based on the date of completing the previous inspection report. For purposes of this section, the owner or operator has completed an inspection when the inspection report has been placed in the facility’s operating record as required by § 257.105(g)(6).

(ii) In any calendar year in which both the periodic inspection by a qualified professional engineer and the quinquennial (occurring every five years) structural stability assessment by a qualified professional engineer required by §§ 257.73(d) and 257.74(d) are required to be completed, the annual inspection is not required, provided the structural stability assessment is completed during the calendar year. If the annual inspection is not conducted in a year as provided by this paragraph (b)(4)(ii), the deadline for completing the next annual inspection is one year from the date of completing the quinquennial structural stability assessment.

(5) If a deficiency or release is identified during an inspection, the owner or operator must remedy the deficiency or release as soon as feasible and prepare documentation detailing the corrective measures taken.

(c) The owner or operator of the CCR unit must comply with the recordkeeping requirements specified in § 257.105(g), the notification requirements specified in § 257.106(g), and the internet requirements specified in § 257.107(g).

§ 257.84 Inspection requirements for CCR landfills.

(a) Inspections by a qualified person. (1) All CCR landfills and any lateral expansion of a CCR landfill must be examined by a qualified person as follows:

(i) At intervals not exceeding seven days, inspect for any appearances of actual or potential structural weakness

and other conditions which are disrupting or have the potential to disrupt the operation or safety of the CCR unit; and

(ii) The results of the inspection by a qualified person must be recorded in the facility’s operating record as required by § 257.105(g)(8).

(2) Timeframes for inspections by a qualified person—(i) Existing CCR landfills. The owner or operator of the CCR unit must initiate the inspections required under paragraph (a) of this section no later than October 19, 2015.

(ii) New CCR landfills and any lateral expansion of a CCR landfill. The owner or operator of the CCR unit must initiate the inspections required under paragraph (a) of this section upon initial receipt of CCR by the CCR unit.

(b) Annual inspections by a qualified professional engineer. (1) Existing and new CCR landfills and any lateral expansion of a CCR landfill must be inspected on a periodic basis by a qualified professional engineer to ensure that the design, construction, operation, and maintenance of the CCR unit is consistent with recognized and generally accepted good engineering standards. The inspection must, at a minimum, include:

(i) A review of available information regarding the status and condition of the CCR unit, including, but not limited to, files available in the operating record (e.g., the results of inspections by a qualified person, and results of previous annual inspections); and

(ii) A visual inspection of the CCR unit to identify signs of distress or malfunction of the CCR unit.

(2) Inspection report. The qualified professional engineer must prepare a report following each inspection that addresses the following:

(i) Any changes in geometry of the structure since the previous annual inspection;

(ii) The approximate volume of CCR contained in the unit at the time of the inspection;

(iii) Any appearances of an actual or potential structural weakness of the CCR unit, in addition to any existing conditions that are disrupting or have the potential to disrupt the operation and safety of the CCR unit; and

(iv) Any other change(s) which may have affected the stability or operation of the CCR unit since the previous annual inspection.

(3) Timeframes for conducting the initial inspection—(i) Existing CCR landfills. The owner or operator of the CCR unit must complete the initial inspection required by paragraphs (b)(1) and (2) of this section no later than January 18, 2016.

(ii) New CCR landfills and any lateral expansion of a CCR landfill. The owner or operator of the CCR unit must complete the initial annual inspection required by paragraphs (b)(1) and (2) of this section no later than 14 months following the date of initial receipt of CCR in the CCR unit.

(4) Frequency of inspections. The owner or operator of the CCR unit must conduct the inspection required by paragraphs (b)(1) and (2) of this section on an annual basis. The date of completing the initial inspection report is the basis for establishing the deadline to complete the first subsequent inspection. Any required inspection may be conducted prior to the required deadline provided the owner or operator places the completed inspection report into the facility’s operating record within a reasonable amount of time. In all cases, the deadline for completing subsequent inspection reports is based on the date of completing the previous inspection report. For purposes of this section, the owner or operator has completed an inspection when the inspection report has been placed in the facility’s operating record as required by § 257.105(g)(9).

(5) If a deficiency or release is identified during an inspection, the owner or operator must remedy the deficiency or release as soon as feasible and prepare documentation detailing the corrective measures taken.

(c) The owner or operator of the CCR unit must comply with the recordkeeping requirements specified in § 257.105(g), the notification requirements specified in § 257.106(g), and the internet requirements specified in § 257.107(g).

Groundwater Monitoring and Corrective Action

§ 257.90 Applicability. (a) Except as provided for in § 257.100

for inactive CCR surface impoundments, all CCR landfills, CCR surface impoundments, and lateral expansions of CCR units are subject to the groundwater monitoring and corrective action requirements under §§ 257.90 through 257.98.

(b) Initial timeframes—(1) Existing CCR landfills and existing CCR surface impoundments. No later than October 17, 2017, the owner or operator of the CCR unit must be in compliance with the following groundwater monitoring requirements:

(i) Install the groundwater monitoring system as required by § 257.91;

(ii) Develop the groundwater sampling and analysis program to include selection of the statistical

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Kansas City, MO 64114 O 816-333-9400 F 816-333-3690

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