Physical Address
304 North Cardinal St.
Dorchester Center, MA 02124
D5875 – Standard Test Method Technical Guide
🔍 Introduction and Scope
ASTM D5875/D5875M-18 establishes a standard guide for the use of cable-tool drilling and sampling methods specifically for geoenvironmental exploration and the installation of subsurface water quality monitoring devices. A key principle highlighted at the outset is that the selection of a particular drilling procedure must be driven by the types of samples required and the specific geohydrologic conditions observed at the study site. The standard establishes a clear dual-unit policy, stating that values expressed in either SI or inch-pound units are to be regarded separately as the standard and used independently. It is also explicitly framed as a guide rather than a mandatory protocol, offering an organized collection of information that must be applied using professional judgment in conjunction with formal education and experience (Section 1.6).
💡 Critical Selection Criteria: Per Section 1.2, the core driver for choosing a drilling procedure is the combination of target sample types and observed geohydrologic conditions. This tailored approach ensures the integrity of the geoenvironmental investigation.
🛠️ Essential Equipment: Drilling and Fishing Jars
The standard provides precise definitions for specialized cable-tool components, notably the “jars”. Section 3.1.2 defines jars as a tool composed of two connected links or reins with vertical play. Their primary function is to deliver a sudden upward load to free stuck tool strings. The standard differentiates between types based on their stroke length. Drilling Jars feature a stroke of 230 to 460 mm [9 to 18 in.], optimized for loosening a string of tools stuck during drilling. Fishing