Laserfiche WebLink
FIELD METHODS AND PROCEDURES <br /> FIELD PROCEDURES <br /> The following section describes field procedures that are completed by Delta personnel in the performance <br /> of the tasks involved with this project <br /> 1.0 HEALTH AND SAFETY PLAN <br /> Fieldwork performed by Delta and Delta's subcontractors at the site is conducted according to guidelines <br /> established in a Site Health and Safety PIan (SHSP) The SHSP is a document which describes the <br /> hazards that may be encountered in the field and specifies protective equipment, work procedures, and <br /> emergency information A copy of the SHSP is at the site and available for reference by appropriate <br /> parties during work at the site <br /> 2.0 DRELLING AND SOIL SAMPLING <br /> Soil borings and soil sampling is performed under the direction of a Delta geologist Delta contacts <br /> Underground Service Alert at least 48 hours in advance before dnlling to locate public utility lines in the <br /> vicinity of the site Before drilling, each borehole location is hand augured with an 8-inch diameter auger <br /> to 5 feet below grade to reduce the risk of damaging underground utilities or structures The soil boring <br /> is advanced using a truck-mounted, hollow-stem auger drilling ng by a licensed well driller <br /> To reduce the chances of cross-contamination between boreholes, all downhole drilling equipment is <br /> steam-cleaned between each boring To reduce cross-contammation between samples, the split-barrel <br /> sampler is washed in a solution of trisodiumphosphate(TSP) soap and water, and double-rinsed between <br /> each sampling event <br /> Soil sampling is performed in accordance with ASTM 1586-84 Using this procedure, a 2-inch <br /> outside-diameter split-barrel sampler or a 2-inch inside-diameter Califorma-type sampler is driven into <br /> the soil by a 140-pound weight falling 30 inches After an initial set of 6 inches, the number of blows <br /> required to drive the sampler an additional 12 inches is blown as penetration resistance or the "N" value <br /> The N value is used as an empirical measure of the relative density of cohesionless soils and the <br /> consistency of cohesive soils <br /> LRP002 066 <br />