ARCHIVED REPORTS XR0003533 - Laserfiche WebLink

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FUGRO WEST, INC. STANDARD OPERATING PROCEDURES RE HAND-AUGER BORING SAMPLING (SOIL AND GROUND WATER) SOP-1A Sod During drilling with a hand auger, soil cuttings from a recorded depth are typically described geologically using the USCS on a boring log Soil samples for potential laboratory analysis are typically collected in thin-wailed brass or stainless steel tubes 6 inches long by 2 inches outside diameter The samples may be collected directly from the hand-auger bucket or using a slide hammer If a slide hammer is used, a sampling tube is placed into the sampler at the end of the hammer, which is threaded onto steel extension rods and lowered into the borehole A manual pounding motion is used to drive the sampler into the soil The number of drops (blows) used to drive the sampler may be recorded on a boring log When the sampler is filled, it is removed from the borehole and the tube containing the sample is removed The ends of the tube are typically covered with aluminum foil or "Teflon" sheets and plastic caps The sample may be extruded from the tube and sealed within another appropriate clean sample container (e g , glass far, plastic bag) The sealed sample is labeled and refrigerated for delivery, under strict chain-of- custody, to the analytical laboratory These procedures minimize the potential for cross- contamination and volatilization of volatile organic compounds (VOC) prior to chemical analysis Material from hand-augering may be analyzed or screened in the field, using either a portable photoionization detector (PID) or equivalent analytical instrument The purpose of this field analysis is to qualitatively determine the presence or absence of hydrocarbons The soil sample is enclosed in a container (e g , plastic bag or glass jar) to allow for some volatilization of VOC The PID is then used to measure the concentrations of hydrocarbons within the container headspace The data is typically recorded on the boring logs at the depth corresponding to the sampling point Ground Water Boring ground water samples are typically collected from a clean bailer or similar sampling device lowered into the borehole The sampling container and any preservative is determined by the potential analytes and analytical method For volatile organic analyses, the water sample is decanted into each VOA vial in such a manner that there is no meniscus at the top of the vial A cap is quickly secured to the top of the vial The vial is inverted and gently tapped to see if air bubbles are present If none are present, the vial is labeled and refrigerated for delivery, under strict chain-of-custody, to the analytical laboratory Label information typically includes a unique sample identification number, job identification number, sampler identification, date, and time All hand-augering and sampling equipment are either steam-cleaned or washed prior to use at each site and between boreholes to minimize the potential for cross-contamination Sampling equipment is also cleaned between samples