Construction of Mather Airport Replacement Fuel Farm was awarded to GEMS Environmental Management Services and TSI Engineering, Inc. (TSI) were assigned the task of Construction Supervision and Inspection for this prestigious FAA project. Total cost of this project was $2.063M. Following are the salient features of this exalted Aviation project:
At the time of going to tender no geotechnical information was available of the proposed construction site, though the contract compaction requirements for subgrade and base course were exceptionally high. In the first phase of construction, when the excavation was taken in hand, TSI was encountered with predominantly plastic and saturated clays/soils not suitable for compaction without pretreatment. Also there was no provision of import of suitable backfill material to achieve requisite compaction requirements. The contractor was therefore advised to dry the excavated soils to eliminate extra moisture and to compact the selected backfill material at optimum moisture content. Specified 98 % compaction of subgrade was achieved by deploying suitable compaction equipment and precisely controlling the moisture content during compaction process. To ensure quality control, extensive compaction tests of the subgrade were carried out through Sierra Testing Laboratories and County Material Testing Laboratory independently.
Similarly 100 % relative dry density of base course material was achieved by selecting the best base course material within the contract provisions and effectively controlling the moisture content during the compaction process. Quality control and extensive density testing was accomplished during compaction of base course material in 6 inches layers.
Requisite flexural strength of concrete was ensured by strict control of water/cement ratio and monitoring the quality per approved mix design at the production plant. All concrete placements were accomplished between the hours 3: 00 am to 8: 00 am when the temperature was considered comparatively more suitable for concrete placement. All tests for the flexural strength were accomplished by County Material Testing Laboratory as per directions of County Engineer. On-site testing of concrete such as slump test, air entrainment test and unit weight were determined by Sierra Testing Laboratories Inc. having one of their technician at the production plant at all the times when concrete production was in progress. Fabrication, transport and erection of Fuel Tanks were carried out through properly qualified, well trained, experienced and job dedicated personnel. All requisite tests to ensure the performance of Tanks will be performed in the presence of manufacturer’s representatives.
Utilities were laid and tested as per contract provisions. In the original contract sewer from the Tank Farm, after treatment at Oil/ Water separator, was to be discharged in to the existing main sewer line. During the course of the project it was decided that effluent from the Oil Water Separator be further treated at Contech Manhole Stormfilter and the clear water be discharged into Storm water drain instead of main sewer line. This was accomplished by installing a 48 inch Manhole Stormfilter at the outlet of Oil/ Water Separator and the filtered water was discharged into storm water drain.
Our construction management professionals organize, lead and manage the people, materials and processes of truction utilizing construction management professionals.
4600 Roseville Rd. Suite 140
N Highlands, CA 95660