ARCHIVED REPORTS_XR0007033 - Laserfiche WebLink

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1 ' FIELD METHODS AND PROCEDURES FIELD PROCEDURES ' The following section describes field procedures that will be completed by ENSR personnel in the performance of the tasks involved with this protect 10 HEALTH AND SAFETY PLAN ' Fieldwork performed by ENSR and subcontractors at the site will be conducted according to guidelines established in a Health and Safety Plan (HASP) The HASP is a document describing ' the hazards that may be encountered in the field and specifies protective equipment, work procedures and emergency information A copy of the HASP will be at the site and available for ' reference by appropriate parties during work at the site 2 0 DRILLING AND SOIL SAMPLING Soil s borin9 and soil samples will be performed under the direction of a qualified ENSR geologist Soil borings will be drilled using a truck-mounted hollow stem auger drilling rig Soil sampling conducted in accordance with ASTM 1586-84 will use a 2-inch outside-diameter split-barrel sampler or a 2-inch inside-diameter California-type sampler driven into the soil by a 140-pound weight falling 30 inches After an initial set of 6 inches, the number of blows required to drive the sampler an additional 12 inches, known as penetration resistance or the "N" value, is recorded The "N" value is used as an empirical measure of the relative density of cohesionless soils and ' the consistency of cohesive soils The sampler is lined with three brass sample tubes, each 6-inches long and the outside diameter equal to the inside diameter of the sampler Samples will ' be collected at 5-foot intervals or as directed by the geologist All soil samples are examined in the field by a geologist and are described by color, grain size and ' moisture content and are classified in accordance with the Unified Soil Classification System visual and manual method A portion of the soil sample is placed into a plastic bag and sealed for headspace analysis of the organic vapors using a photo-ionization detector (PID) equipped with a 10 2ev lamp The soil sample collected in the 'eading brass tube within the California-type sampler will be labeled, sealed and stored on ice pending sample selection and transport to the laboratory for analysis Representative portions of the samples will be retained for further examination and for verification of the field classification Logs of the borings indicating the depth and identification of the various strata, the "N" value and pertinent information regarding the method of maintaining and advancing the boring will be made All drilling and sampling equipment will be cleaned before drilling each boring using a high-pressure, steam-cleaning apparatus The