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• ATTACHMENT A FIELD PRACTICES AND PROCEDURES AND QUALITY ASSURANCE PLAN General procedures used by SECOR International Inc (SECOR) in site assessments for drilling exploratory brings, collecting samples, installing monitoring wells, sampling monitor wells, analytical procedures, and assessment of data are described herein These general procedures are used to provide consistent and reproducible results However, some procedures may be modified based on site conditions In addition, this attachment presents a quality assurance plan adopted to conducting the activities described here PRE-FIELD WORK ACTIVITIES Health and Safety Plan Fieldwork performed by SECOR at the site is conducted according to guidelines established in a Site Health and Safety Plan (SHSP) The SHSP is a document which describes the hazards that may be encountered in the field and specifies protective equipment, work procedures, and emergency information A copy of the SHSP is at the site and available for reference by appropriate parties during work at the site Locating Underground Utilities Prior to commencement of any work that is to be below surface grade,the location of the excavation , boring, etc , is marked with white paint as required by law An underground locating service such as Underground Service Alert (USA) is contacted The locating company contacts the owners of the various utilities in the vicinity of the site to mark the locations of their underground utilities Any invasive work is preceded by hand augering to a minimum depth of five feet below surface grade to avoid contact with underground utilities FIELD METHODS AND PROCEDURES Drilling Soil borings will be drilled using truck-mounted, hollow stern auger drill rig Soil samples for logging will be obtained from auger-return materials and by advancing a modified California split-spoon sampler equipped with brass or stainless steel liners into undisturbed soil beyond the tip of the auger Soils will be logged by a geologist according to the Unified Soil Classification System and standard geological techniques Soil Sampling equipment will be cleaned with detergent water solution (Ligonox or TSP), rinsed with clean water, and equipped with clean liners between sampling intervals A consulting geologist will oversee a drilling company steam clean augers and samplers between each boring to reduce the possibility of cross contamination Steam cleaning effluent will be contained in 55-gallon drums and temporarily stored onsite The disposal of the effluent will be stored on site in 55-gallon DOT approved drums prior to disposal