RECOMMENDATION: The General Services Department recommends approval of final contract amount of $1,664,632.66 and acceptance of work on contract with DNB Enterprises, Inc., for underground storage tank replacement at the Environmental Service Center – South, and the installation of stormwater interceptors at Environmental Service Center – North, and Northwest Service Center, for the Solid Waste Management Department.
SPECIFIC EXPLANATION: The General Services Department recommends that City Council approve the final contract amount of $1,664,632.66 or 5.33% below the original contract amount, accept the work and authorize final payment to DNB Enterprises, Inc., for construction services in connection with storage tank removal, remediation, and installation at the Environmental Service Center – South, and the installation of stormwater interceptors at Environmental Service Center – North, and Northwest Service Center.
PROJECT LOCATIONS: Council District
ESC – South 11500 S. Post Oak Road, Houston, Texas 77035 K
ESC – North 5614 Neches Street, Houston, Texas 77026 H
Northwest Service Center 1245 Judiway Street, Houston, Texas 77018 C
PROJECT DESCRIPTION: The project removed four underground storage tanks, installed three new underground storage tanks, installed one new above ground storage tank, completed regulatory reporting and site closure, and installed three stormwater interceptors.
CONTRACT COMPLETION AND COST: The contractor completed the project within 692 days: the original contract time of 180 days, plus 512 days approved by Change Orders. The final cost of the project including Change Orders is $1,664,632.66, a decrease of $93,633.34 below the original contract amount. The project was under budget because equipment purchases were not required.
PREVIOUS CHANGE ORDERS: Change Order Nos. 1 – 10 added modification of pipe trench layout; relocation of previously unmarked water utilities, including trench safety and plumbing permit; supply and installation of electrical transformer; removal of additional tank hold-down concrete slab; additional concrete removal and disposal; installation of housekeeping slab and extended awning for waste oil tank; addition of fuel canopy maintenance and painting, and replacement of lighting; additional temporary tank rental; supply and installation of replacement air and water hoses and reels; supply and installation of revised connectors for rapid fueling reels; sampling of soil and groundwater and preparation of a risk-based site assessment; provided credits to the City for materials and work not required to complete the project; and added days to the contract duration due to the time required for regulatory reviews by the Texas Commission on Environmental Quality and addressing their comments.
M/W/SBE PARTICIPATION: The contract contained a 15% MBE goal and 13% WBE goal. According to the Office of Business Opportunity, the contractor achieved 16.74% MBE/SBE participation and 14.82% WBE participation and was assigned an outstanding rating.
WBS No: L-000080-0002-4-01-01 and L-000099-0002-4-01-01
DIRECTOR’S SIGNATURE/DATE:
___________________________________
C. J. Messiah, Jr.
General Services Department
__________________________________
Harry J. Hayes
Solid Waste Management Department