ARCHIVED REPORTS XR0000768 - Laserfiche WebLink

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Soil Classification Samples will be classified onsite by the field geologist in accordance with the Unified Soil Classification System Representative portions of the samples will be retained for further examination and for verification of field classification Logs of the borings indicating the depth and identification of the various strata and pertinent information will be prepared for the final written report Soil Sample Screening Soil samples selected for chemical analysis will be determined from a head-space analysis using a PID or an FID The soil will be places in a Ziploc®- type resealable plastic bag and allowed to reach ambient temperature, at which time the PID probe will be inserted into the bag The total volatile hydrocarbons present are detected by the PID and reported in parts per million by volume (ppmv) A PID is calibrated by entering the known concentration (in ppmv) of a containerized gas (typically isobutylene) into the display function of the PID machine The containerized gas is released through an inert (plastic) tube into the sensory received of the PID The PID normalizes its volatile organic compounds (VOC) detection sensors to match the known concentration of the gas being input into the PID machine Soil Sample Collection During drilling, soil samples will be collected in clean brass, two by six inch tubes The tubes will be set in an 18-inch-long split-barrel sampler The sampler will be conveyed to the bottom of the borehole attached to a wire-line hammer device drill rig When possible, the split-barrel sampler will be driven its entire length, either hydraulically or by repeatedly pounding a 140-pound hammer using a 30-inch drop The number of drops (blows) used to drive the sampler will be recorded on the boring log The sampler will be extracted from the borehole, and the tubes containing the sod samples will be removed Upon removal, the ends of the lowermost tube will be sealed with Teflon T11 sheets and plastic caps Soil Samples for chemical analysis will be labeled, placed on ice, and delivered to a state-certified analytical laboratory, along with the appropriate chain-of-custody documentation Label information includes a unique sample identification number, lob identification number, date, and time After labeling, all soil and water samples are placed in a Ziploc@ type bag and placed in an ice chest cooled to approximately 4°C Upon arriving at SECOR's office, these samples are transferred to a locked refrigerator cooled to approximately 4° Celsius Chemical preservation is controlled by the required analysis and is noted on the chain-of custody The number of samples collected to evaluate impact to soil is determined by the overseeing registered geologist or engineer This information and rationale is typically presented in the work plan Stockpiled Drill Cuttings and Soil Sameling Soil generated during drilling operations will be stockpiled onsite The stockpile will be set on and covered by plastic sheeting in a manner to prevent rain water from coming in contact with the soil Prior to collecting soil samples, SECOR personnel will calculate the approximate volume of soil in the stockpile The stockpile will then be divided into 50 cubic yard (volume) sections, if warranted, for sampling Soil samples will be collected at 0 5 and 2 feet below the surface of the stockpile Four soil samples will be collected from the stockpile and composited into one sample by the laboratory prior to analysis The soil samples will be collected in clean brass, two by six inch tubes using a hand