SPECIFIC EXPLANATION: The General Services Department recommends that City Council approve the final contract amount of $237,761.31 or 11.70% over the original contract amount, accept the work and authorize final payment to AIA General Contractors, Inc. for remediation, removal, and installation of USTs at Fire Station No. 34 for the Houston Fire Department.
PROJECT LOCATION: 3100 Laura Koppe Road, Houston, Texas (Key Map 454-E)
PROJECT DESCRIPTION: The project removed two 1,000 gallon gasoline USTs, along with associated appurtenances and installed one 5,000 gallon gasoline, double-wall fiberglass reinforced plastic, two compartments UST. The scope of work also included disposal of aqueous liquid, saw-cutting, demolition and removal of concrete paving, backfilling and compaction, waste classification, loading, hauling and proper disposal of debris generated as a result of all activities.
PREVIOUS HISTORY AND PROJECT SCOPE: On December 22, 2015, Ordinance No. 2015-1307, City Council approved a First Amendment which increased the director’s authority to approve Change Orders up to 15.60% and appropriated an additional sum of $11,710.31 that provided for the installation of a slide-rail shoring, which stabilized the collapsing excavation and prevented further expansion.
CONTRACT COMPLETION AND COST: The contractor completed the project within 224 days: the original contract time of 180 days plus 44 days approved by Change Orders. The final cost of the project including Change Orders is $237,761.31, an increase of $24,896.31 over the original contract amount.
PREVIOUS CHANGE ORDERS: Change Order Nos. 1 – 4 generally addressed unforeseen conditions and improvements to the project which included the disposal of an additional 150 cubic yards of Class II soil and 130 cubic yards of additional pea gravel backfill; additional concrete removal, disposal and pour-back; installation of a slide-rail shoring system to prevent slough/cave off due to unexpected soil conditions; and credits to the contract for materials and work not required to complete the project.