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known,Unified Soil Classification Symbol, secondary components and
<br /> estimated percentages, color,plasticity,consistency (cohesive soil),
<br /> density (non-cohesive soil),moisture content, structure and orientation,
<br /> and grain angularity. Rock core parameters for logging shall include,but
<br /> shall not be limited to,rock type,formation,modifier denoting variety
<br /> (shaly, calcareous, siliceous,etc.), color,hardness, degree of cementation,
<br /> texture, crystalline structure and orientation, degree of weathering,
<br /> solution or void conditions, primary and secondary permeability, and lost
<br /> core. The results of any chemical field screening shall also be included on
<br /> the boring log. Classification shall be prepared in the field at the time of
<br /> sampling. The results of visual observation of the material encountered,
<br /> and any unusual odor detected shall also be duly noted and recorded.
<br /> M. Depth of any observed fractures,weathered zones, or any abnormalities
<br /> encountered.
<br /> N. Depth and estimated percent of drill fluid loss or lost circulation.
<br /> Measures taken to regain drill water circulation. Significant color changes
<br /> in the drilling fluid return.
<br /> O. Box or sample number. Depths and the number of the core boxes and/or
<br /> samples shall be recorded at the proper interval.
<br /> P. Percent Rock Core Recovery. The percent core recovery for the
<br /> individual drill runs, if rock is cored,shall be shown.
<br /> 3.08.2 Installation Diagrams
<br /> Contractor shall provide geologic logs (prepared by a registered professional as
<br /> required in 3.08.1) and installation diagrams. The diagram shall illustrate the as-built
<br /> condition of the well and include,but not be limited to,the following items:
<br /> C. Name of the project and site.
<br /> D. Well identification number.
<br /> E. Name of driller and name and signature of the geologist preparing
<br /> diagram.
<br /> F. Date of well installation.
<br /> G. Description of material from which the well is constructed,including well
<br /> casing/riser pipe and screen material, centralizer composition,if used,
<br /> diameter and schedule of casing and screen, gradation of filter pack,
<br /> lithologic description,brand name (if any), source, and processing
<br /> method, and method of placement of the filter pack,bentonite seal type
<br /> (pellets, granules, chips,or slurry), grout type (cement or high-solids
<br /> bentonite) and type of protective cover(protective casing or flush-to-
<br /> ground).
<br /> H. Total depth of well.
<br /> I. Nominal hole diameter.
<br /> J. Depth to top and bottom of screen, and filter pack.
<br /> K. Depth to top and bottom of any seals installed in the well boring(grout or
<br /> bentonite).
<br /> Foothill Landfill Site Improvement Project 12 GROUNDWATER MONITORING WELLS
<br /> San Joaquin County Public Works . Section 02522
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