Laserfiche WebLink
16 February 1999 <br /> AGE-NC Project No. 98-0534 <br /> Page 7 of 7 <br /> be allowed into any excavation greater than five bsg without proper excavation shoring and/or <br /> sloping techniques in-practice. <br /> 4.2. SOIL SAMPLING PROCEDURES <br /> Soil samples collected from the base and sidewalls of the excavation will be obtained using a <br /> backhoe. Soil samples will be collected from the bucket of the excavating equipment by pressing a <br /> 3-inch long by 2-inch diameter brass sleeve into the excavated soil material using a metric soil <br /> sampling hammer. The exposed ends of the sample sleeve will be covered with Teflon sheets, <br /> capped and sealed with tape. <br /> Soil samples will be collected from soil stockpiles by digging approximately one foot into the soil <br /> stockpile. Soil samples will be collected pressing a brass sampling sleeve into the soil stockpile with <br /> a metric soil sampler. <br /> Following sample collection, each sample sleeve will be labeled with the boring location, depth, <br /> time,date and sampler's initials. Appropriately sealed and labeled samples will be placed in a chilled <br /> container under ice and transported under chain-of-custody procedure to a DHS-certified laboratory. <br /> 4.3. EQUIPMENT DECONTAMINATION <br /> Prior to each sample collection, all sampling tools used for sample collection will be thoroughly <br /> rinsed with clean water after being washed with a solution of Alconox. <br /> 5.0. REFERENCES <br /> California Division of Mines and Geology, 1981. Regional Geologic Map Series, Sacramento <br /> Quadrangle. <br /> Olmsted, F.H., and G.H. Davis, 1961, Geologic Features and Groundwater Storage Capacity of the <br /> Sacramento Valley, California, U.S. Geological Survey Water Supply Paper 1497, 241p. <br /> A6-anredGcoEnvironmcnt21,Inc. <br />