Rock Coring and Report
The A/E shall perform rock coring and report on the results of same.
Rock coring, logs and report shall conform to the requirements of
ASTM D2113, "Diamond Core Drilling for Site Investigation." The
number and depth of rock cores to be taken shall be established at
fee negotiations. Rock core logs shall be shown on the drawings
along with the soil boring logs. The report shall be incorporated
with or be integral to the soils report prepared for soil borings.
The report shall be used to establish an estimated quantity for rock
removal as a basis for bidding construction of the project (see the
chapter titled "Civil Design").
Topsoil Tests and Report
The A/E shall have the site's topsoil tested by a qualified soils
testing laboratory for the nutrient content, pH, percent organic
matter and texture using laboratory methods described in U.S.D.A.
Soil Survey Investigations Report No. 1, "Procedures for Collecting
Samples and Methods of Analysis for Soil Survey" or other methods
approved by the Association of Official Analytical Chemists.
Nutrients to be tested for are calcium, total nitrogen, magnesium,
phosphorus, and potassium. Soil texture is to include the percentage
of sand, silt and clay. Soil samples shall be taken at a depth of
four inches when determining conditions for turf establishment and
twelve inches when determining conditions for trees, shrubs, and
other ground covers.
The report shall indicate the test results and include an
interpretation of the findings and recommendations for amending the
soil to provide optimum growing conditions for turf grasses and other
ground covers and/or trees and shrubs.
Roof Samples and Report
The A/E shall obtain roof samples for the project to ascertain the
composition of the existing roofing system(s); the samples are not
intended for the determination of moisture penetration throughout the
membrane(s). The intent of taking roof samples is to ensure that the
drawings and specifications accurately reflect the type(s) of roofing
assemblies present on the existing building(s) to permit the
contractor to accurately bid on removal and/or repair.
The A/E shall determine the composition of the existing roof(s),
including asbestos content, by taking roof core samples of the areas
to be repaired or re-roofed. A roof core sample shall be taken at
every roof level and where, through site investigations or drawings
of previous work, a change in roofing materials is suspected. Such
samples shall be cut by a contractor regularly engaged in or
qualified to do roof inspections. The samples shall be no larger
than 4" wide by 12" long and be cut through all roofing materials,
including insulation, down to the top surface of the roof deck. The
A/E shall determine the asbestos content of all roofing and flashing
materials. The A/E shall be responsible for the replacement of all
core samples and insuring that all cut areas are properly and
adequately repaired to a watertight, weatherproof, and, where