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Stonecrest Annual 2018 Page 11 / 38
agement Act, 2002 (Ontario Regula- of at least 10%.
tion 267/03 and amended to Ontario
Regulation 511/05). This involves a b. Unlined storage facilities with
minimum number of one test hole unreinforced concrete floors must
per 1,000 m2, either by the excava- have, between the bottom of the
tion of test pits using a backhoe or storage facility and the uppermost
excavator, or boring holes with a identified bedrock layer or
drilling rig, to a depth of at least: aquifer, a minimum of 1.0 m of
hydraulically secure soil or 1.0 m
a. 1.5 m (5 ft) below the lowest of soil comprised of a clay content
excavation point for a structure of at least 15%.
made of concrete or steel; or
c. Lined storage facilities with
b. 2.5 m (8 ft) below the lowest reinforced concrete floors must
excavation point for a structure have, between the bottom of the
made of earth storage facility and the uppermost
identified bedrock layer or
The test holes must be located aquifer, a minimum of 0.5 m of
3m-10m outside the perimeter of native, undisturbed material, or
the structure’s footprint. During the compacted granular material.
on-site investigation, soil samples
are collected at 1 m intervals, and are d. Lined storage facilities with
visually identified. Representative unreinforced concrete floors must
samples are then submitted to our have, between the bottom of the
laboratory for particle size analyses. storage facility and the uppermost
CMT Engineering Inc. then makes identified bedrock layer or
recommendations and provides de- aquifer, a minimum of 1.0 m of
sign requirements for liquid manure native, undisturbed material, or
storage facilities constructed from compacted granular material.
concrete or steel, as well as earthen
lagoons, and determines the suitabil- Following the excavation for the pro-
ity of the soils and if geosynthetic or posed storage facility, CMT Engineer-
compacted soil liners are required. ing Inc. must be contacted for a site
visit to inspect the soil subgrade prior
Concrete or Steel Liquid Nutrient to the placement of concrete, com-
Storage Facility pacted clay liner or mechanical liner.
This is to verify the founding soils
According to the Nutrient Manage- match the findings of the investiga-
ment Act, 2002, all new liquid ma- tion throughout the base of the fa-
nure storage facilities require two cility since the test holes are actually
levels of underground protection. located outside of the structures foot
Permanent concrete or steel facilities print. If a liner is required, addition-
must meet one of the following re- al inspections of the liner will need
quirements: to be carried out. If a geosynthetic
clay liner is recommended, it will
a. Unlined storage facilities with need to be utilized in all areas of the
reinforced concrete floors must subgrade that contain hydraulically
have, between the bottom of the insecure soil. The extent of the liner
storage facility and the uppermost will be determined at the time of the
identified bedrock layer or subgrade inspection and may include
aquifer, a minimum of 0.5 m of the base and walls of the facility as
hydraulically secure soil or 1.0 m required. CMT personnel shall in-
of soil comprised of a clay content
