Stormwater Report

INTERNAL AUDIT REPORT 

LIMITED OPERATIONAL AUDIT 
MARITIME STORMWATER UTILITY 

JANUARY 1, 2016  JUNE 30, 2017 

ISSUE DATE: OCTOBER 6, 2017 
REPORT NO. 2017-17

STORMWATER UTILITY                                         INTERNAL AUDIT 
JANUARY 2016  JUNE 2017 

TABLE OF CONTENTS 


EXECUTIVE SUMMARY ................................................................................................................................................. 3 
BACKGROUND ............................................................................................................................................................... 4 
AUDIT SCOPE AND METHODOLOGY ............................................................................................................................ 5 
SCHEDULE OF FINDINGS AND RECOMMENDATIONS ............................................................................................... 6 














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STORMWATER UTILITY                                         INTERNAL AUDIT 
JANUARY 2016  JUNE 2017 

EXECUTIVE SUMMARY 
Internal Audit (IA) completed a limited operational audit of the Maritime Stormwater Utility for the
period January 1, 2016  June 30, 2017. The audit was performed to assess the design and operating
effectiveness of internal controls. 
We concluded that key terms in the Interlocal Agreement were achieved and that a system was
established to assess, and, repair, or replace, stormwater infrastructure by December 31, 2019. 
IA identified the following issue: 
1) Internal controls should be implemented to decrease the likelihood of billing errors. To 
improve efficiency, management should also develop a plan to automate the billing
process. 
Management agrees with the issue and developed an action plan to remediate the issue by January 1,
2018 (see schedule of findings and recommendations on page six). 
Our audit was conducted in accordance with Generally Accepted Government Auditing Standards and
the International Standards for the Professional Practice of Internal Auditing. Those standards require
that we plan and perform the audit to obtain sufficient, appropriate evidence to provide a reasonable
basis for our findings and conclusions based on our audit objectives. We believe that the evidence
obtained provides a reasonable basis for our findings and conclusions based on our audit objectives. 
We extend our appreciation to the management and staff of the Maritime Environmental Services
Department for their assistance and cooperation during the audit. 



Glenn Fernandes, CPA                       Dan Chase, CPA 
Director, Internal Audit                         Manager, Internal Audit 

RESPONSIBLE MANAGEMENT TEAM 
Lindsay Pulsifer, Managing Director, Maritime 
Stephanie Jones Stebbins, Director Environmental/Planning 
Srinivas Pendikatla, Utility Program Manager 
Jane Dewell, Senior Environmental Program Manager 


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STORMWATER UTILITY                                         INTERNAL AUDIT 
JANUARY 2016  JUNE 2017 

BACKGROUND 
The Port of Seattle (Port) created the Maritime Stormwater Utility (Utility) by negotiating an
agreement with the City of Seattle (City). On January 1, 2015, the Port established the Utility pursuant
to the Revised Code of Washington 53.08040, 53.08043, 35.67.010, and 35.67.020. These statutes
authorize port districts to establish, operate, furnish, and fund surface water and stormwater services,
facilities, systems, and programs, including pollution control and treatment of stormwater discharge. 
Prior to establishing the Utility, the Port paid the City stormwater drainage fees that reached nearly
four million in 2014. The fees were rising annually by about 10% and the Port received no return on
investment. By establishing the Utility, the fees collected from Port tenants are used to assess, repair,
and improve stormwater infrastructure. 
The Port's Stormwater Utility Charter, includes stormwater service charges per 1,000 square feet of
billable area. The rates are grouped into five categories or groupings (undeveloped, light, medium,
heavy, very heavy) based on impervious surface percentage. Impervious surface is defined as
impenetrable materials preventing water from entering the ground. These surfaces include paved
areas, roofs, docks, piers, and gravel. Pervious surface includes dirt and grass and allows water to
infiltrate through the top surface. 
Below are the 2015, 2016, and 2017 service charges per 1,000 square feet of billable area: 
Stormwater Service Charge per 1,000 Square Feet of Billable Area 
Category/Grouping        Impervious Percentage           2015   2016   2017 
Undeveloped              0-15%                         $28.05   $29.17   $30.34 
Light                       16-35%                              43.37    45.11    46.91 
Medium                36-65%                       63.00   65.52   68.14 
Heavy                   66-85%                         84.53   87.91   91.42 
Very Heavy                86-100%                         99.98   103.98   108.14 
In November 2016, the Port entered into an Interlocal Agreement (ILA) with the City which serves as
the operating agreement. The ILA outlines roles and responsibilities, including:  ownership and
maintenance of drainage pipes and other storm water facilities, dispute resolution processes, and
property access challenges (where one party's pipes or infrastructure are located on the other Party's
property). 
Below reflects the department's annual revenue: 
Maritime Stormwater Utility 
Revenue                          2015      2016  YTD 2017 * 
Sale of Utilities - Surface Water                $4,403,498      $2,888,599   $1,912,784 
Sale of Utilities - Surface Water NWSP -           788,835     673,611 
Sale of Utilities - Intercompany -          1,073,549      564,116 
TOTAL                          $4,403,498   $4,750,983  $3,150,511 
*Through 8/31/2017 
Data Source: PeopleSoft Financials                                                                      2

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STORMWATER UTILITY                                         INTERNAL AUDIT 
JANUARY 2016  JUNE 2017 

AUDIT SCOPE AND METHODOLOGY 

The period audited was January 1, 2016  June 30, 2017. To obtain an understanding of the program
audited, we interviewed management, reviewed policy and procedural documents, and analyzed data. 
Our audit included the following procedures: 
1) Identified key terms in the ILA and verified compliance. 
2) Evaluated the billing process: 
Assessed internal controls. 
Re-performed billing calculations to assess mathematical accuracy. 
Agreed leased square footage and stormwater rates from PROPworks to the billing spreadsheet 
(Excel). 
Confirmed the monthly tenant billing, calculated in Excel, was accurately entered into
PROPworks. 
Traced the amount billed from PROPworks to PeopleSoft. 
3) Validated that a process was established to assess and repair stormwater infrastructure: 
Reviewed assessment, cleaning, and rehabilitation targets reflected in the Maritime Stormwater
Utility Steering Committee materials. 
Reviewed video imaging of stormwater pipe assessments. 
Traced video imaging to the Stormwater GIS 2.0 database and verified a structural score was
assigned. 

CONCLUSION 








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STORMWATER UTILITY                                         INTERNAL AUDIT 
JANUARY 2016  JUNE 2017 

SCHEDULE OF FINDINGS AND RECOMMENDATIONS 
RATING: MEDIUM 
INTERNAL CONTROLS SHOULD BE IMPLEMENTED TO DECREASE THE LIKELIHOOD OF BILLING
ERRORS. TO IMPROVE EFFICIENCY, MANAGEMENT SHOULD DEVELOP A PLAN TO AUTOMATE THE
BILLING PROCESS. 
The Stormwater Utility Manager uses an Excel spreadsheet to calculate the monthly stormwater billing
for approximately 180 tenants. After the stormwater fee is calculated, the fee is provided to the Real-
Estate Management department for re-entry into PROPworks.
Updating the spreadsheet is manual, thus, prone to input error, and is not reviewed by a second
individual. Versions from prior months are not maintained, making it difficult to create an auditable
trail. The spreadsheet also resides on an employee's desktop which limits the ability for another
individual to perform the billing function should the employee be sick or leave the Port. 
Recommendation 
1) Enhance internal controls around the existing Excel spreadsheet by including version controls,
performing a secondary review of billing changes, and maintaining the spreadsheet in a shared location
with limited edit privileges. 
2) Implement a monthly process to agree monthly grand totals calculated in excel to the grand total 
entered into PROPworks. 
3) Assess the feasibility of migrating the entire billing process into PROPworks. 
Management Response 
We agree with Internal Audit's recommendations. The first and second recommendation will be
addressed by January 1, 2018. We have moved the billing file to a SharePoint location used for other
Utility documentation with limited edit privileges. We will introduce version control process and
perform a secondary review of all billing changes. We will also obtain and review a monthly download
of PROPworks data to compare to the billing numbers prior to bills processing every month. 
The final recommendation will be addressed by the end of the first quarter of 2018. We will assess the
feasibility of migrating the billing process to PROPworks. If it is determined to be feasible, we will
develop a schedule for the migration to PROPworks. If not feasible, we will evaluate other options to
automate the billing process with a verification step to ensure accuracy. 



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