Laserfiche WebLink
k" KLEINFELDER <br /> APPENDIX B <br /> TYPICAL KLEINFELDER FIELD PROTOCOL <br /> B-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 /> B-2 DRILLING AND SUBSURFACE SOIL SAMPLING <br /> B-2.1 Drilling <br /> Soil borings are advanced using a truck-mounted drill rig, equipped with hollow stem augers. <br /> Subsurface soil samples are collected from the soil borings. While drilling, an experienced <br /> environmental geologist classifies the soil, logs the stratigraphy of the borings, and collects soil <br /> samples. <br /> B-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 borings. 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 /> 20-3712-08.E02/2018R1090 Page 13-1 <br /> ©1998,Kleinfelder,Inc. Decembe! 23, 1998 <br />