WORK PLANS - Laserfiche WebLink

Home Browse Search

GEOMATRIX each, moisture content, color according to the Munsell color charts (Kollmorgen Instruments Corp.), plasticity for fine-grained materials, consistency, and other pertinent information, such ' as degree of induration, calcareous content, presence of fossils and other distinctive materials. ' The original field logs will be retained by the Geomatrix office for review by the responsible professional and for storage in the project files. ' 4.0 GEOPHYSICAL LOGS Following completion of drilling, downhole geophysical logs may be performed after the drilling fluid has been circulated to decrease the amount of suspended sediment in the return ' fluid. Geophysical methods and equipment will be selected to provide stratigraphic or hydrogeologic data appropriate for the project. Geophysical logging will be done as quickly and promply after drilling as feasible, while the boring sidewall is still in stable condition, to ' reduce the possibility of bridging. Instruments on the logging unit will be adjusted to try to give the maximum definition of strata boundaries. All downhole geophysical equipment will ' be cleaned before and after use in each borehole. ' 5.0 FIELD SCREENING ' Soil samples collected from the borings may be screened using a portable meter such as a photoionization detector (PID), a flame ionization detector (M), a lower explosion limit (LEL) meter or other organic vapor meter. The meter may be used to assess the presence of volatile organic compounds (VOCs) or other gases in soil samples. Additional field screening techniques for chemical characterization of soils may include x-ray fluorescence (`KRF) and ' thin-layer chromatography (TLC). Procedures for field screening are described in the protocol SOIL SAMPLING FOR CHEMICAL, ANALYSIS. 1 DRILLING .aND DEMUCTION OF SOIL 30RINGS page :of 5 NSC'.PROTO-DD= REVtSION DATE: MARCH :9% DD-5