Laserfiche WebLink
' �` ■ KLEINFELDER <br /> APPENDIX A <br /> TYPICAL KLEINFELDER FIELD PROTOCOL <br /> 1 <br /> A-1 FIELD PREPARATION <br />' Before performing work in the field, environmental staff reviews the scope of work, prepares a <br /> health and safety plan, coordinates the work to be done with their supervisor, assembles the <br />' necessary sample equipment containers, and checks, calibrates and cleans equipment to be used <br /> in the field Underground Service Alert (USA) is also contacted prior to field work with the <br /> marked boring locations and the scheduled date of drilling, in addition, a utility locating firm is <br />' sometimes employed to check the boring locations <br /> A-2 DRILLING AND SUBSURFACE SOIL SAMPLING <br /> A-21 Drilling <br /> Soil borings are advanced using a truck-mounted drill ng, equipped with hollow stem augers <br /> Subsurface soil samples are collected from the soil bonngs While drilling, an experienced <br /> environmental geologist classifies the soil, logs the stratigraphy of the borings, and collects soil <br /> samples <br /> A-2 2 Qualitative Field Screening <br /> ' An organic vapor detector, such as a Photovac TIP, using a photo-ionization detector (PID) or a <br /> Foxboro flame-ionization detector (FID), is used to provide a qualitative screening of each soil <br /> sample collected from the bonngs The organic vapor detector measures ionizable compounds in <br /> the air in parts per million by volume (ppmv) Field calibration is performed using a calibrated <br /> span gas such as 100-ppm isobutylene Ambient air is used to set the instrument to zero The <br /> soil contained in the cone of the sampler or in a brass tube is exposed and screened with the <br /> ' organic vapor detector The vapor reading is noted as the field screening result <br /> For the protection of the drilling crew, the organic vapor detector also is used to measure the <br /> ' volatile concentrations in the breathing zone prior to and while drilling the borings Total <br /> ionizable hydrocarbon readings in excess of 1 ppmv may necessitate respiratory protection for <br /> the affected crewmembers This requirement is included in the complete field health and safety <br /> ' plan developed for the project prior to the start of fieldwork <br /> ' A-2.3 Collection of Soil Samples <br /> Soil samples are collected approximately every S to 10 feet for field screening and logging <br /> ' Samples are collected by advancing the boring to a point immediately above the desired sampling <br /> depth and then driving (vertical bonngs) or pushing (slant bonngs) a 2-inch diameter Modified <br /> . California Split-Spoon Sampler, lined with three 6-inch long brass tubes, into the undisturbed <br /> ' 18748 T021 ST03A08I Page A-1 <br /> 002003 Kleinfelder,Inc January 23,2003 <br /> 1 <br />