ARCHIVED REPORTS_XR0004892 - Laserfiche WebLink

Home Browse Search

Compliance & Closure, Inc. Soil Sampling Protocol Latest Revision March 1998 Upon retrieval, the sampler is disassembled into its component parts . One or more of the liners is selected for chemical analysis . The ends of the selected liner (s) are sealed with aluminum foil or teflon tape, capped with plastic caps, labeled, logged on chain-of-custody forms and stored in a chilled ice chest for preservation in the field and during transport to the analytical laboratory All labels are pre-written to the extent possible with indelible ink to minimize handling time 5) Samples not sealed for chemical analysis are checked for the presence of contamination in the field by the geologist Any discoloration or odor is noted on the boring log Each sample is classified in the field by a geologist using the Unified Soil Classification System and a Munsell soil color chart In addition, samples may also be field-screened with a photoionization detector (calibrated daily) or threshold limit value sniffer. In either case, the instrument probe is held adDacent to freshly crumbled soil and the stabilized reading value is recorded on the log Values of volatile vapors measured in the field are reconnaissance only and are not meant to supplant chemical analysis in a certified laboratory. Other visual screening techniques include examination of the sample under hand-lens magnification as well as floating- sheen inspection resulting from immersion in water Lithology logging will collect geologic data as required, using conventional geologic and hydrogeologic terminology When rock is logged, a GSA Rock Color Chart and appropriate terminology will be employed to describe rock, fractures, bedding, etc Soil or rock coring may be specified by the supervising geologist on a pro]ect- specific basis 6) Samples are +held in the possession of CCI personnel until transferred to the analytical laboratory Transfer to the laboratory is accomplished with either delivery by CCI personnel, pick-up by laboratory personnel, or transfer by a personal delivery service . Each transfer of responsibility is recorded on a chain- of-custody record that accompanies the samples 7) Conditions occasionally arise when other drilling equipment is used given site-specific formation conditions . Rotary drilling may be selected if coring or bearing conditions arise Rotary or casing hammer may be used as deep drilling, flowing sands, or formation- specific conditions require .