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k'q KLEINFELDER <br /> APPENDIX A <br /> TYPICAL KLEINFELDER FIELD PROTOCOL <br /> A-1 FIELD PREPARATION <br /> Before performing work in the field, environmental staff reviews the scope of work, <br /> prepares a health and safety plan, coordinates the work to be done with their <br /> supervisor, assembles the necessary sample equipment containers, and checks, <br /> ■ calibrates and cleans equipment t o be u sed I n t he f geld U nderground S ervice Alert <br /> (USA) Is also contacted prior to field work w ith t he m arked b onng 1 ocations a nd t he <br /> scheduled date of drilling, in addition, a utility locating firm Is sometimes employed to <br /> check the boring locations <br /> A-2 DRILLING AND SUBSURFACE SOIL SAMPLING <br /> A-2.1 Drilling <br /> Soil borings are advanced using a truck-mounted drill rig, equipped with hollow stem <br /> 9 9 9 <br /> augers Subsurface soil samples are collected from the sod borings While drilling, an <br /> experienced environmental geologist classifies the soil, logs the stratigraphy of the <br /> borings, and collects soil samples <br /> A-2 2 Qualitative Field Screenin <br /> An organic vapor detector, such as a Photovac TIP, using a photo-Ionization detector <br /> (PID) or a Foxboro flame-Ionization detector (FID), is used to provide a qualitative <br /> screening of each soil sample collected from the borings The organic vapor detector <br /> measures Ionizable compounds in the air in parts per million by volume (ppmv) Field <br /> calibration Is performed using a calibrated span gas such as 100-ppm isobutylene <br /> Ambient air is used to set the Instrument to zero The soil contained in the cone of the <br /> �r sampler or In a brass tube is exposed and screened with the organic vapor detector <br /> 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 <br /> measure the volatile concentrations in the breathing zone prior to and while drilling the <br /> borings Total ionizable hydrocarbon readings in excess of 1 ppmv may necessitate <br /> respiratory protection for the affected crewmembers This requirement Is included in <br /> the complete field health and safety plan developed for the project prior to the start of <br /> fieldwork <br /> A-2 3 Collection of Soil Samples <br /> Soil samples are collected approximately every 5 to 10 feet for field screening and <br /> logging Samples are collected by advancing the boring to a point Immediately above <br /> the desired sampling depth and then driving (vertical borings) or pushing (slant borings) <br /> 28209 T0915T05R13231DH IV Page A-1 <br /> O 2005, Kleinfelder, Inc October 21, 2005 <br />