at each well under construction a portable water [,and NAPL] level
measuring device of sufficient length to measure the water [/NAPL]
level to [50] [_____] meter [165] [_____] foot depth. The device
shall be available onsite at all times and measuring wire shall be
graduated in mm 0.01 foot. The method of measuring the liquid
level shall be noted on the boring log. Water [and NAPL] level
measurements shall be taken to the nearest mm 0.01 foot. It shall
be noted on the boring log if the boring was purged and allowed to
recover at intervals during the installation , or that water used
in drilling was allowed to dissipate into the formation prior to
measuring the water level.
p.
Box or sample number. Depths and the number of the core boxes
and/or samples shall be recorded at the proper interval.
q.
Percent Rock Core Recovery. The percent core recovery for the
individual drill runs, if rock is cored, shall be shown.
3.13.2
Installation Diagrams
The well will not be accepted before the geologic logs and installation
diagrams are received. The diagram shall illustrate the as-built condition
of the well and include, but not be limited to, the following items:
a.
Name of the project and site.
b.
Well identification number.
c.
Name of driller and name and signature of the geologist preparing
diagram.
d.
Date of well installation.
e.
Description of material from which the well is constructed,
including well casing/riser pipe and screen material, centralizer
composition, if used, diameter and schedule of casing and screen,
gradation of filter pack, lithologic description, brand name (if
any), source, and processing method, and method of placement of
the filter pack, bentonite seal type (pellets, granules, chips, or
slurry), grout type (cement or high-solids bentonite) and type of
protective cover (protective casing or flush-to-ground),if used.
f.
Total depth of well.
g.
Nominal hole diameter.
h.
Depth to top and bottom of screen, and filter pack.
i.
Depth to top and bottom of any seals installed in the well boring
(grout or bentonite).
j.
Type of cement and/or bentonite used, mix ratios of grout, method
of placement and quantities used.
k.
Elevations/depths/heights of key features of the well, such as top
of well casing/riser pipe, top and bottom of protective casing (if
used), ground surface, the depth of maximum frost penetration
(frost line), bottom of well screen, top and bottom of filter
pack, and top and bottom of seal.
SECTION 02521
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