Request for Quotation Onside Sewerage System Upgrade

Saanich Schools invites quotations from qualified contractors for performance of upgrading the existing onsite septic system including but not limited to connecting to the existing sewage pipes from the building, Install owner supplied: 2 new precast concrete 2500gal septic tanks, 1 new 2500gal precast concrete Bionest treatment tank,1 new 2500gal precast concrete pump chamber. Supply and install; effluent pump, Rhombus pump control panel, PVC DR35 gravity sewer collection pipe, Sch40 pvc pressure sewer pipe, dispersal field sch40 pvc laterals, drain rock, 4-inch French drain, air pumps, air lines, in ground air vent chambers, finish grading, topsoil and seeding.

Amendment 3  2023-05-11

Questions and Answers:
 Q1       Is there a depth at which the French Drain is to be installed? A1       The French drain should be 2-ft wide by 2-ft deep. The perforated pipe needs to slope down towards the existing culvert at a minimum grade of 0.3 percent (as per engineer).  Q2      Can you answer anything about material/soil leaving or being re-used on the site?  Specifically, what would be expected from a contractor? A2       We would expect the contractor to haul away any excess soil unless they request and get permission from the School District to leave it onsite and blend it in with the existing fill slope.
Native soil could be used for landscaping. Granular fill (sand or 3/4-inch max size gravel) is recommended around the tanks, and pipes to protect the pipes and tanks and minimize the probability of pipe settlement.  Note: Bidders must eliminate the in-ground air pump change and instead install the air pumps inside the school building in the mechanical room.