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TO: BOARD OF SUPERVISORS
FROM: J. MICHAEL WALFORD, PUBLIC WORKS DIRECTOR
DATE: January 21, 1986
SUBJECT: Report of Cost Allocation Study for the Oakley-Bethel Island Wastewater Management
Authority November, 1985
Specific Request(s) or Recommendation(s) & Background & Justification
RECOMMENDATION
The Board of Supervisors of Contra Costa County, as the Board of Directors of Contra Costa
County Sanitation District No. 15, accepts the Cost Allocation Study Report for the
Oakley-Bethel Island Waste Water Management Authority.
FINANCIAL IMPACT
Sanitation District No. 15 will receive $402,462 from the Oakley-Bethel. Island Wastewater
Management Authority through a reallocation of the local share of the sewer treatment plant
improvement costs which were jointly funded by Sanitation District No. 15 (Bethel Island)
and Oakley Sanitation District.
BACKGROUND
The Joint Exercise of Powers Agreement (JEPA) that created the Oakley Bethel Island Wastewater
Management Authority (OBIWMA) was approved in early 1977. The agreement specified the
amount of sewage flow that would be accepted from the Oakley Sanitary District and Contra Costa
Sanitation District No. 15. When the sewage collection system in Sanitation District No. 15
was put in operation, the measured flow was five times the flow stated in the JEPA. Rather
than rewrite the JEPA the OBIWMA Board of Directors decided to proceed with construction of
the treatment plant and adjust the cost split after having a year of flow records. The
measured flows from Sanitation District No. 15 are approximately 2 1/2 times that stated in
the JEPA and the Oakley Sanitary District flow are approximately 1 1/3 times what the JEPA
stated. All agencies involved realize that it is extremely difficult for a district to
regulate the volume of its sewage flow. Adjusting the cost split to equal the split of the
flows during the first year of operation is the most equitable way of dividing up the cost
of .the treatment plant.
The Citizens Advisory Committee of Contra Costa County Sanitation District No. 15, the
Board of Directors of the Oakley Sanitary District and the Board of Directors of the
Oakley-Bethel Island Wastewater Management Authority have studied the report and have
recommended its acceptance and implementation.
Continued on attachment: yes ignature:
Recommendation of County Administra r Reco tion of Board Committee
Approve Other:
Signature(s):
Action of Board on: ,2j / �Q',G Approved as Recommended Other
Vote of Supervisors I HEREBY CERTIFY THAT THIS IS A TRUE
AND CORRECT COPY OF AN ACTION TAKEN
Unanimous (Absent ) AND ENTERED ON THE MINUTES OF THE
yes: Noes: BOARD OF SUPERVISORS ON DATE SHOWN.
Absent: Abstain:
Attested a/ /U j�-
obi .alloationbo.tl2 14
Orig. Div.: Public Works - Sanitary Services Phil Batchelor
. cc: Public Works Department Clerk of the Board of
Accounting Supervisors and County
OBIWMA tXt-0-1 P W Administrator
1"SD 15 � P w �,(