Appendix 4- SWMP

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                                  5.    Installation and assembly

5.2.4 Connection of several tanks
                                                                            > 500 mm
                                                                            > 19.7 inch
                                                                                 -



Two or more tanks are connected
via the assembly surfaces by
means of GARANTIA special seals
and basic pipes (to be provided at
construction site).
The apertures must be drilled to the
corresponding size using only the
GARANTIA special crown bit. It must be ensured that the distance between the tanks is at least 500 mm
(19.7 inch). The pipes must project at least 200 mm (7.9 inch) into the tanks.



5.3   Insertion and filling

                                                                          > 100 mm
                                                                      -
The tanks must be inserted, impact-free, into                             > 3.9 inch


the    prepared   trench    using    suitable
equipment. To avoid deformities, the tank is
filled 1/3 with water before backfilling the                                                       2. 3/3
excavation.                                                                               1. 1/3




Afterwards the surrounding (round grain
gravel, max. grain size 8/16) is then filled in
layers of max. 30 cm (11.8 inch) and is
compacted.
The individual layers as well as the
medial support column must be well-
compacted (manuel tamper). Damage to
the tank must be avoided during compaction.
Mechanical compaction machines must not
be used under any circumstances. The
surrounding towards the trench must be at
least 100 mm (3.9 inch) wide i.e. the
distance between each wall an the tank must
be ≥ 100 mm (3.9 inch).




                 Backfill material                                                  Suitability

Split (Type B) consisting of max. 16 mm stone                                               
particles capable of solid compaction                                        (recommended)
Round grain gravel to the top of the dome, top                                              
soil to the top of the shaft and lid
(max. grain size 8/16)                                                       (recommended)

Sand mixed with water                                                                     ()
                                                                                          ()
Good garden soil (sandy loam)
                                                           (only soil properties are similar to sand or gravel)
Fine clay soil                                                                            NO



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