Company Product Policies, and Guidelines of Tank Installation
Site
The installation site must be accessible to large heavy crane equipment. A firm, flat and level area of sufficient size to allow maneuvering room for this type of equipment must be provided. This area must be free of overhead wires, tree limbs, or other abovegrade obstructions which could affect normal crane operation.
Excavation
Excavation length and width should allow for a safe clearance on all sides of the precast. To minimize stress on a tank or chamber, it should be placed on a base of gravel or crushed stone, minimum 150mm thick. Soil conditions must be firm and stable.
Soil Conditions
Most of our precast tanks are designed for installation in firm stable soil. Unless designed for such use our product warranty is void where an installation involves saturated/unstable soils. Regardless of any design enhancements the precast structure must always be placed on a flat, firm supporting surface.
Back Filling
Back fill material must be free of boulders and large stones. Back fill must be placed in layers progressively against the four sides of the precast structure. When back filling with an excavator do not drop back fill on the precast or in to the excavation from a height greater than one meter. The wheels or tracks of back filling equipment must be kept at least one meter away from the tank or chamber. At no time should heavy equipment come in contact with any part of the precast.
Compaction of fill around a tank can impose stresses sufficient to cause failure of the walls. Discretion must be used in this operation. Naturally large tanks with comparat ively thin walls should be backfilled and compacted to minimize this stress.
Joint Seal
- The mating surfaces of the joint must be clean and dry. The lower precast section should be placed in its final position in the excavation. The joint of this section should be made clean and dry, then mastic strips of sealant applied. Ensure that the ends of each strip overlap by a minimum of 26mm as the sealant is laid around the joint.
- Using lifting equipment that is safely adequate for the job, hoist each subsequent precast section a few feet above the ground in an open area away from the excavation. The joint surface of this section must now be inspected. A broom should be used to sweep away adherent debris. Care must be taken that the people preforming this task have ample room to maneuver and do not at any time work directly under the hanging load. Should it prove impossible to clean the joint properly in this way, the section must be safely blocked up in position to allow access from underneath.
- Once the joint surfaces are clean, dry, free of debris and extra mastic has been applied in areas where the male or female joint might have been chipped or broken in handling, the upper section can be carefully set directly onto the lower section.
Testing
Joint Fill the tank with water to 6 inches (152mm) above the joint. Observe the outside of the tank at the joint for a suitable period of time; usually 2 – 24 hours.
Caution: Filling the tank with liquid before backfilling
Many of the precast tanks detailed in this catalogue rely on support from the surrounding earth, in which they are buried, to resist stress imposed by the contained liquid. It is recommended that the tank at no time be filled higher than 6 inches (152mm) above the lowest outside level of backfill.
Brooklin Concrete Products warrants its product to be free of defects in material and workmanship, insofar as such products are of its own manufacture and are installed and used in accordance with our recommendations and/or installation guidelines.
This warranty shall be in effect for a period of one year from the day of shipment. This limited warranty covers the repair or replacement, as Brooklin Concrete Products may elect, of defective products regarding which, upon discovery of the defect, the purchaser has given immediate written notice.
This warranty does not apply to any product that has been subjected to abuse or misuse, or to a product that has been altered or modified by others in any way so as, in our judgment, to affect its dependability. Brooklin Concrete Product’s liability shall be limited to the repair or replacement of its product, the cost of which shall not exceed the original purchase price of the product.
Products sourced from others than Brooklin Concrete are subject to their own respective warranties and policies.
It is Brooklin Concrete Products’ policy to request a deposit on specially manufactured products that are produced or modified to meet the unique requirements of a specific project.
A minimum deposit of 50% must be received before production of the special order will begin.
This policy has been implemented to ensure the monetary involvement of a purchaser ordering a tailor-made product is no reflection on a customer’s credit worthiness.
Special order products cannot be returned for refund.
Items being returned for credit or exchange must be returned within 30 days from the date of original sale. A minimum 25% restocking charge will apply to ALL returned product. In order for a credit to be issued, the product must be in its “original” condition and accompanied by the purchase receipt. Product that has been altered or damaged in any way will not be accepted, or credited. We will not refund for product that has been custom-made (special order).
Many of our products are delivered to site on our self-unloading crane trucks. Precast Concrete sections weighing in excess of 2,500kg that are delivered to a jobsite on a Brooklin Concrete Products crane truck can be placed in their permanent position only if proper access is provided to a firm, flat, level and obstruction free area of sufficient size to accommodate our vehicle. The center of the placement location must be located directly to the rear of the crane truck and within 3 to 5 meters behind the vehicle. E.g. Depending on the size of the tank; sections weighing less than 2,500 kg are not normally placed but are simply offloaded for others to move in to position. Our crane operators are instructed to refuse to attempt any operation that may involve a safety hazard or may jeopardize our equipment.
Please see our installation guidelines for more information
NOTE: We recommend a site inspection be arranged through the office if a contractor is unsure of the placing of a tank e.g. 11,000 litres up to 30,000 litres.
NOTE: BCP tanks 30,000 litres and above require an onsite crane at the contractor’s expense.
A homeowner’s guide to a healthy sewage system. Please see Ontario Wastewater Associations guide in the link below.
