DRILLING AND SAMPLING METHODS Clause Samples
The "Drilling and Sampling Methods" clause defines the procedures and standards to be followed when conducting drilling and collecting samples during a project. It typically outlines the approved techniques, equipment, and protocols for obtaining soil, rock, or groundwater samples, and may specify requirements for sample preservation, labeling, and documentation. By establishing clear expectations for how drilling and sampling are to be performed, this clause ensures consistency, data reliability, and compliance with regulatory or project-specific standards.
DRILLING AND SAMPLING METHODS a. The location and depth of the borings proposed by the ENGINEER shall be shown on a sketch accompanying the ENGINEER’s proposal. If the ENGINEER finds it necessary to change the location or depth of any of these proposed borings, the DISTRICT shall be notified and a new location or depth shall be agreed upon between the DISTRICT and the ENGINEER.
b. If unusual conditions are encountered, including but not limited to unanticipated materials which cannot be penetrated by standard sampling equipment, the ENGINEER shall immediately consult with the DISTRICT. The ENGINEER shall take such measures as are required to obtain the necessary information, subject to the DISTRICT’s approval.
c. The ENGINEER shall advise the DISTRICT as to any further exploration and testing required to obtain information that the ENGINEER requires for a professional interpretation of subsoil conditions at the PROJECT site and shall perform such additional work as authorized by the DISTRICT. The extent of exploration undertaken shall be consistent with that necessary to perform services consistent with the standards of the ENGINEER’s profession and that which would be necessary given the size and scope of the PROJECT consistent with the terms of this AGREEMENT. Sampling operations for both disturbed and undisturbed samples shall be in accordance with recommended American Society for Testing Materials (ASTM) Standards and other procedures, and as necessary to produce the information required for the Report(s).
d. Unless otherwise stipulated, drilling and sampling will be performed in accordance with current applicable ASTM Standards and other standards, including but not limited to ASTM Standards D1586, D1587 and D2113.
e. Samples of soil shall be taken at the ground surface, at least two feet below existing grade and at each identifiable change in condition, but not further apart than five feet in each of the borings unless otherwise specified on the boring drawing(s). Where clayey cohesive soils are encountered, thin-walled tube samples shall be taken of representative strata. Split-spoon samples shall be placed in sealed jars labeled with the following information: (1) boring numbers, (2) sample number, (3) sample depth, (4) blows per increment required to drive sample as per applicable standards, (5) date, (6) PROJECT name, and (7) ENGINEER’s name.
f. Rock cores shall be not less than one and one eighth (1-1/8) inches in diameter, and shall be placed in core boxes properly labeled ...
DRILLING AND SAMPLING METHODS. 3.3.1 Unless otherwise specified or approved by the Owner, drilling and sampling shall be performed in accordance with the applicable ASTM standards, current at the time of Agreement signing, including, but not limited to, ASTM D1586, D1587 and D2113. Soil samples shall be taken at the ground surface, at two feet below existing grade, and at each change in soil stratification or soil consistency, but not further apart than five feet in each of the borings unless otherwise specified on the boring plot plan(s). Where clay cohesive soils are encountered, thin‑walled tube samples shall be taken of representative strata. Split‑spoon samples shall be placed in sealed jars labeled with the following information: (1) boring number, (2) sample number, (3) sample depth, (4) blows per foot required to drive sample, (5) date, (6) Project name, and (7) Consultant's name.
3.3.2 Rock cores shall be not less than 1 3/8" in diameter, and shall be placed in core boxes properly labeled as indicated in 3.
3.1. Cores shall be advanced to the depth specified in Exhibit A.
3.3.3 The samples shall be preserved and remain subject to inspection for a period of six (6) months as specified by the Owner. Field logs shall be prepared either by the Consultant or by an experienced Geotechnical Technician acting under the direct supervision of the Consultant.
DRILLING AND SAMPLING METHODS. 4.3.1 Unless otherwise stipulated, drilling and sampling will be performed in accordance with current applicable ASTM Standards and other standards, including but not limited to ASTM Standards D1586, D1587, and D2113. Samples of soil shall be taken at the ground surface, at two feet below existing grade and at each identifiable change in condition, but not further apart than five feet in each of the borings unless otherwise specified on the boring drawing(s). Where clayey cohesive soils are encountered, thin-walled tube samples shall be taken of representative strata. Split-spoon samples shall be placed in sealed jars labeled with the following information:(1) boring numbers, (2) sample number, (3) sample depth, (4) blows per increment required to drive sample as per applicable standards, (5) date, (6) Project name, (7) Sampling Technician's name.
4.3.2 Rock cores shall be not less than 1 3/8 inches in diameter, and shall be placed in core boxes properly labeled as indicated above.
4.3.3 The samples shall be preserved and field logs prepared either by a Consultant or by an experienced Soil Technician acting under the supervision of a Consultant.
4.3.4 The Consultant shall notify the Owner's Representative before drilling equipment is removed from the site and advise the Owner's Representative as to the field description of soil conditions encountered. The Consultant shall perform such additional borings or other exploration as may be authorized by the Owner.
5.1 FORMAT:
DRILLING AND SAMPLING METHODS. 4.3.1 Unless otherwise stipulated, drilling and sampling will be performed in accordance with current applicable ASTM (American Society of Testing and Materials) standards and other standards, including, but not limited to, ASTM standards D1586, D1587 and D2113.
4.3.2 The samples shall be preserved and field logs prepared either by a Geotechnical Engineer or by an experienced soils technician acting under the supervision of a Geotechnical Engineer.