Approval of an Agreement with SanCon Engineering Inc. to Rehabilitate Sewer Manholes Throughout the City. City of Culver City California City Council Agenda Item Report Item Number: C 6 Meeting Date: 05/29/07 AGENDA ITEM: Approval of an Agreement with SanCon Engineering Inc. to Rehabilitate Sewer Manholes Throughout the City. Contact Person/Dept. Eric Mirzaian/PW Phone Number: (310) 253 6410 Fiscal Impact: Yes X No General Fund: Yes No X Public Hearing: Public Notification: Master Notification List (05/24/07) and SanCon Engineering by e mail 05/23/07). Action Item: X Attachments: X Department Approval: Charles D. Herbertson 5/08/07 City Controller Approval: Marlee Chang (05/21/07) City Attorney Approval: Carol Schwab (by H. Iker) (05/16/07) City Manager Approval: Jerry B. Fulwood (05/23/07) RECOMMENDATION: Staff recommends the City Council approve an agreement with SanCon Engineering Inc. (SanCon) to rehabilitate sewer manholes throughout the City. BACKGROUND: A sewer manhole is a maintenance access point from the surface of the ground to the sewer main. Sewer manholes are primarily constructed of brick and mortar and have a steel ladder. Bricks are inert and do not deteriorate however. the hydrogen sulfide gases generated by the sewage flow will cause the mortar to disintegrate between the bricks. Without the bonding of the mortar to the bricks structural failure of the manhole could result causing bricks to fall into the sewer main leading to blockage of sewage flow and in the worst case scenario collapse of the street above the manhole. DISCUSSION: Sewer manholes are commonly rehabilitated in two methods. The first method includes spraying an epoxy resin on the interior of the manhole. The epoxy resin is a short term rehabilitation strategy and is inexpensive. The second method includes installing a cured in place multi layer fiberglass in the interior of the manhole. This method is more expensive but is durable and longer lasting than the first method. The latte...
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