Sanitary Sewer Condition Assessment - Energy.gov Libr… · SANITARY SEWER CONDITION ASSESSMENT HNF-51469 Revision 0 1 1.0 INTRODUCTION Mission Support Alliance, LLC (MSA), manages

Sanitary Sewer Condition Assessment

Prepared by

Mission Support Alliance

February 27, 2012

HNF-51469

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SANITARY SEWER CONDITION ASSESSMENT HNF-51469

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EXECUTIVE SUMMARY

Mission Support Alliance (MSA) has responsibility for all sanitary wastewater at the Hanford Site in the

100 Area, 200 Area, and 600 Area. Currently the sewer lagoon in the 100N Area handles the collected

wastewater from the most populated area of the Central Plateau. Some of the more remote and

disconnected facilities have septic systems. Other facilities have holding tanks from which the

wastewater is pumped and hauled to the treatment facility. A new aerated evaporative lagoon is currently

being constructed in 200 West Area. In 2012, when the 200 West Lagoon is completed, the 100N Lagoon

will be turned over for demolition, and much of the wastewater on the Central Plateau will be piped

and/or hauled to the new lagoon. Most septic systems continue to operate well and are projected to

provide adequate service as populations decline. However, as septic systems fail and are converted to

holding tanks, their wastewater will be hauled to the new lagoon as well. Consequently, this plan

envisions the 200 West Lagoon as the principal treatment option for the Site through the targeted Site

closure in 2045.

The following list represents the primary recommendations for the Hanford Site Sanitary Sewer Systems:

1. Complete construction of a new aerated evaporative lagoon in 200 West Area.

2. The new 200W Lagoon is a long term solution adaptable to conditions as facilities are

decommissioned.

3. A new evaporation lagoon in 200 East is a potential option to support the proposed 200E office

complex and fueling systems.

4. As more facilities are decommissioned, gravity sewer flows will decrease necessitating

coordinated flushing with the potable water system to prevent sediment build-ups and the

formation of methane gas and acidic degradation of the collection piping system.

5. As septic systems are retired and facilities are removed from the piped collection system, there

will be a need for more holding tanks and haul trucks.

6. A need exists to evaluate system engineering processes to better integrate:

a. Site-wide communications

b. Equipment, facility, and maintenance platforms

c. A program to verify the integrity and long-term reliability of main trunk sewers.

This plan evaluates a limited number of Hanford Site Septic Systems in an effort to determine the overall

condition and life expectancy. A more comprehensive analysis is performed periodically and is located in

the Hanford Site Sanitary Sewer System Master Plan.


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INTERFACE MATRIX BETWEEN MSA AND KEY STAKEHOLDERS

STAKEHOLDER STAKEHOLDER

CONTACTS MSA CONTACTS

INTERFACE

CONTROL

DOCUMENT

DOE/RL Liz Bowers

(509) 373-9276

Sheila Hahn

(509) 376-5940

Roy Hammond

(509) 373-5824

DOE/ORP Garth Reed

(509) 376-2626

Roy Hammond

(509) 373-5824

WTP/BNI William Clements

Scott Booth

Mike Pell

Roy Hammond

(509) 373-5824

24590-WTP-ICD-MG-

01-001 & 002

WRPS

Tank Farm

Operations

Tom Mackey

(509) 373-3823

Christopher Woehle

(509) 373-2424

Roy Hammond

(509) 373-5824

HNF-4493, Rev. 1

June 28, 2010

CHPRC Tony Jennings

(509) 373-3447

Steve Moore (100K)

(509) 373-2567

Dave Kuehn (400 Area)

(509) 373-0228

Roy Hammond

(509) 373-5824

HNF-46148, Rev. 0

May 2010

WCH Arnie Gutmanis (100N, 300

Areas) (509) 531-8162

Scott Feaster

(509) 372-9213

Roy Hammond

(509) 373-5824


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ACKNOWLEDGEMENT SHEET

The following individuals, with specific expertise and experience, participated in the preparation and

reviews of the Hanford Site Sewer System Condition Report.

Randy Adkins SI&U Operations

Ron Bannister Support Engineer

Kirt Bare Civil Engineer

Mary Curry Formatting/Tech Editing

William Dethero Mechanical Engineer, Jacobs

Roy Hammond Sewer Utilities Manager

Brian Harmon Project Manager

Dave Mears Program Manager, Jacobs

Brad Pratt Mechanical Engineer, Jacobs

Tom Sackett Director of Projects

Pat Shults Formatting/Tech Editing, Jacobs

Mark Smith Mechanical Engineer, Jacobs

Gary Stevens Design Authority

DISCLAIMER

This Report was prepared for Mission Support Alliance. While it is believed that the information contained

herein will be reliable under the conditions and subject to the limitations set forth herein, neither Jacobs

Engineering nor Mission Support Alliance warrants or guarantees the accuracy thereof.

The use of this Report or any information shall be at user’s sole risk. Such use shall constitute a release and

agreement to hold harmless, defend and indemnify Jacobs Engineering and Mission Support Alliance from

and against any liability (including but not limited to liability for special, indirect, or consequential damages)

in connection with such use. Such release from and indemnification against liability shall apply in contract,

tort (including negligence of such party, whether active, passive, joint or concurrent), strict liability, or other

theory of legal liability; provided, however, such release, limitation and indemnity provisions shall be

effective to, and only to, the maximum extent, scope or amount allowable by law.

This document shall not be utilized in connection with any prospectus, proxy solicitation, loan

documentation, purchase/sale transaction or any other materials, which may be reasonably expected to affect

any third party investment decision.


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TABLE OF CONTENTS

1.0 INTRODUCTION .................................................................................................................. 1

2.0 200/600 SEWER SYSTEM FACILITY ................................................................................. 5

2.1 200/600 Sewer System Description ............................................................................... 5

2.2 200/600 Sewer Systems Condition Assessments and Recommendations ...................... 5

3.0 REFERENCES ....................................................................................................................... 7

FIGURES

Figure 1 - Hanford 200/600 West Sanitary Sewer Systems ........................................................... 2

Figure 2 - Hanford 200/600 East Sanitary Sewer Systems ............................................................. 3

Figure 3 - Hanford Holding Tanks .................................................................................................. 4

Figure 4 - 100N Sewer Lagoon ....................................................................................................... 4

TABLES

Table 1 - Reviewed 200/600 Sanitary Sewer Conditions and Recommendations.......................... 5

Table 2 - Reviewed 200/600 Sanitary Sewer Conditions and Recommendations.......................... 6


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ABBREVIATIONS/ACRONYMS

DOE U.S. Department of Energy

gpd Gallons per Day

ISAP Infrastructure and Services Alignment Plan

LOSS Large Onsite Sewer System(s)

M&O Maintenance and Operation

MSA Mission Support Alliance, LLC


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1.0 INTRODUCTION

Mission Support Alliance, LLC (MSA), manages the infrastructure and utility systems at the

U.S. Department of Energy (DOE) Hanford Site in south-central Washington State. To enhance the

management of the utilities and support the Site Infrastructure and Services Alignment Plan (ISAP), MSA

conducted a conditions assessment of the sanitary sewer systems. This assessment identifies essential

components, documents current conditions, and provides engineering analysis to more clearly determine

current conditions. These assessments provide the basis for future systems maintenance and operation

(M&O) planning and will be an input to future master plans.

The condition of the 200/600 Area sanitary sewer system described in this report represents the condition

of the systems as of December 31, 2011. Any change in condition of the water system after this date is

beyond the scope of this document and in no way lessens the accuracy of the assessment.

The Hanford Site uses several methods to dispose of sanitary wastewater due to dispersed populations and

topography. These methods include septic tank soil absorption systems, holding tanks, a lagoon system,

and routing to a nearby municipal treatment plant. Current systems at the Hanford Site include the

following:

• Regional Systems: Septic tank soil absorption systems with a daily design flow rate less than

54,890 liters/day (i.e., 14,500 gallons per day (gpd)). Each system consists of a septic tank, a

dosing siphon or an effluent pump and a drain field. Incoming sanitary waste is delivered by

gravity or by a pump. Regional systems are centrally located near concentrated population

centers (see Figure 1 and Figure 2).

• Individual Systems: Septic tank soil absorption systems with a small flow rate, generally less than

13,250 liters/day (i.e., 3,500 gpd). Each system consists of a septic tank, a dosing siphon or an

effluent pump and a drain field. Incoming sanitary waste is delivered by gravity or by a pump.

Individual systems normally serve single facilities located too far from a regional system to

connect economically to a regional system (see Figure 1 and Figure 2).

• Holding Tanks: Collection vessels adjacent to temporary facilities (see Figure 3). Sanitary

sewage is pumped regularly from holding vessels and is presently transported to the 100N

Lagoon for treatment and disposal. With the completion of the 200W Lagoon and the closure of

the 100N Lagoon the sanitary sewage will be transported to the 200W Lagoon for treatment and

disposal.

• Portable Holding Tanks: Self contained sanitary sewer facilities that have no buried or separated

tanks, and can be relocated as necessary around the Hanford site, yet still require frequent effluent

removal. These facilities have inherently low holding capacity, typically are not connected to a

water supply source, and serve minor projects with small populations.

• 100N Sewage Lagoon (Figure 4): A Washington State Department of Ecology permitted sanitary

wastewater lagoon located about one half mile southeast of the N-Reactor in the 100N Area. The

100N sewage lagoon receives direct inflows from the 100N Area, and wastewater from holding

tanks, portable toilet/shower units, and failed systems that are hauled to the lagoon. The 100N

Lagoon will be decommissioned in 2012 as the new 200W Lagoon becomes operational.


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Figure 1 - Hanford 200/600 West Sanitary Sewer Systems


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Figure 2 - Hanford 200/600 East Sanitary Sewer Systems


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Figure 3 - Hanford Holding Tanks

Figure 4 - 100N Sewer Lagoon


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2.0 200/600 SEWER SYSTEM FACILITY

2.1 200/600 SEWER SYSTEM DESCRIPTION

Out of the 72 regional and individual sewer systems at Hanford, 31 are operated and maintained

by MSA. The regional and individual sewer systems are primarily stand-alone systems and in

some locations, small systems are grouped together with lift stations to pump influents to and

from the sewer system.

2.2 200/600 SEWER SYSTEMS CONDITION ASSESSMENTS AND

RECOMMENDATIONS

To assess the condition of the system as a whole, a sample of six sites were inspected with the site

utility personnel. During the site visit, three of the sewer systems were experiencing minor

problems but continued to provide service. Sewer system 2607-W16 is the largest system in

200W and lacks telemetry to retrieve flow data. The drain field is also overloaded and floods

frequently.

Two units, 2607-W6 and 2607-E1, were experiencing problems and were out of service, due

either to lack of controls or spare parts.

Wastewater flows from the two units are pumped to the lagoon at 100N. The Large Onsite Sewer

System (LOSS) at 2607-E12 was working, but frequently needed to be pumped to the 100N

Lagoon, due to lack of drain field capacity (see Table 1 and Table 2).

Table 1 - Reviewed 200/600 Sanitary Sewer Conditions and Recommendations

Sanitary

Sewer

System

Location Description Condition Recommendation

2607-W1 M-2904-W

SH-14

Processes 14.5K gpd.

Modified sanitary

sewer system serves

200W central core

and T Plant - High

flows.

System is operational.

Several ports in the drain

field get saturated.

Decommission drain field

and route system piping to

proposed 200-W Sewer

Lagoon (L-691).

2607-W16 H-2-830532 Designed for 14.5K

gpd. Processes 6K

gpd. Modified

sanitary sewer system

serves 270-Z and

272-WA.

System is operational.

System lacks telemetry to

retrieve flow data needed

for compliance reports.

Drain field saturated in

areas.

Decommission drain field

and route system piping to

proposed 200-W Sewer

Lagoon (L-691).


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Sanitary

Sewer

System

Location Description Condition Recommendation

2607-W6 H-2-16457 Designed for 14.5K

gpd. Processes 6k

gpd. Serves part of

222-S. Influent

delivered by three

single-pump lift

stations.

One of the system pumps

at 8-10 gpm failed. Two

of the three system

pumps do not switch in

automatic mode due to

control problems.

Manual resets are

required to alternate

pumps. Waste presently

pumped to 100N Lagoon.

Replace system pump and

fix controls system so that

the pumps are

automatically switched

during operation.

2607-E1 H-2-828885 Lift station connects

to 2607-E1.

Designed for 14.5K

gpd. Processes 7.0K

gpd.

Both system pumps

failed. System is not

operational. System is

currently pumped to

100N Lagoon.

System lacks spare pumps

and is presently out of

service.

2607-E12 H-2-82091 Designed for 6.7K

gpd. Serves 242A.

System lacks drain field

capacity and is required

to be pumped out

frequently.

System needs additional

pump capacity and drain

field need enlargement –

expansion of system to

14.0K gpd is planned.

6607-16 H-2-88756 Designed for 5.0 gpd.

Serves 2025-E and

2025-EA.

Appears to be operating

properly. System lacks

dosimeter and

compliance reporting is

not possible.

Lack of spare pumps may

lead to non–compliance.

Table 2 - Reviewed 200/600 Sanitary Sewer Conditions and Recommendations

100 Areas

Range

Poor Fair Good Onsite System

Components Comments

Onsite

Systems Onsite Systems in 100B/C, 100K and 100H Areas

are non-MSA systems and excluded from evaluation

X

Lagoons

100 N Lagoon is about to be phased out of service

with the Construction of 200W Evaporative Lagoon

System


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200E Area

Range


Components Comments

X

Pumps More than 50% of the units in the LOSS are single-

pump operated and need off-the-shelf spares to avoid

emergencies.

X

Level

Controls,

Alarms

Some level control trees are not retrievable for

repairs. Alarms are lights only and result in delayed

notification.

X

Instruments More than 50% of subsystems lack dosimeters cause

for overloading or delayed expansion.

X

Drain field

Some systems get saturated. Drain field for 2607-

E12 for facility 242A requires expansion.

200W Area

Range


Components Comments

X

Pumps More than 50% of the units in the LOSS are single-

pump operated and need off-the-shelf spares to

avoid emergencies.

X

Level

Controls,

Alarms

Many alarms are lights only and result in delayed

notification. Lacking standardization in components

for inventory.

X

Instruments More than 50% of subsystems lack dosimeters-

cause for overloading or delayed expansion.

X

Drain field Some systems get flooded. Connecting new loads to

the existing systems, without coordination with

MSA, may lead to overloads.

600 Area

Range


Components Comments

X

Small satellite

system

System with small flows (three out of six units are

holding tanks) have less than 1,000 gpd. Hauling

and disposal is required.

3.0 REFERENCES

HNF-6612, 2010, Sanitary Sewer System Master Plan, Mission Support Alliance, LLC, Richland,

Washington.

Documents

Sanitary Sewer Condition Assessment - Energy.gov Libr… · SANITARY SEWER CONDITION ASSESSMENT HNF-51469 Revision 0 1 1.0 INTRODUCTION Mission Support Alliance, LLC (MSA), manages