Job #3267-3304 Delta WWTP Phase 1

STATEMENT OF PROBLEM

1.) Flow-fill as backfill at excavation under Blower RAS building foundations.

2.)Haul/Access roads on-site.

3.) Concrete mud-mats for structure foundations.

4.) Pipes through walls without sleeves.

5.) Grout for Pipe supports, pump bases and slide gates.

6.) Water-tight testing (fill water, testing, bulkheads, drain water and crack injection)

7.) Exterior Pads not shown in structural drawings. (switch gear, radio shed, odor control, filter)

Grout ROM $40K
Exterior Pads $300K 
ROM for other items was tracked by job 3267.

ROOT CAUSE

COURSE OF ACTION

1.) Job 3304 performed this scope under job 3267 cost codes.

2.) job 3304 had to building the Aeration Tank with no access on the west, south & North sides, with limited access& lay-down on only the east side. 

3.) Job 3304 performed this scope under job 3267 cost codes.

4.) Job 3304 provided costs to back charge job 3267 sub AMS the mechanical contractor.

5.) JOB 3304 performed this scope, but not all items in estimate. 

6.) Most all work performed by 3304 was paid through job 3267.

7.) Job 3304 performed this work as added costs. 

LESSON FOR FUTURE PROJECTS

Items 1, 3, 5, 6& 7.) Estimating from both groups to do scope review for each trade to avoid scope gaps or missing scope.

2.) Every job should have logistic and sequencing plan and schedule meeting with all subs.

4.) Know your own scope and others to avoid performing additional scope.