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QUALITY ASSURANCE AND QUALITY CONTROL PLAN The Quality Assurance/Quality Control Plan (QAQCP) is intended to facilitate the acquisition of accurate and reliable data. Environmental data gathered during the shallow soil and soil vapor sample collection work will be collected and analyzed following procedures prescribed in the Quality Control Plan. A Quality Assurance Plan has been established to assure that the Quality Control Plan is effective. As required all samples collected during the scope of work will be submitted to California Department of Health Services (DHS) Environmental Laboratory Accreditation Program (FLAP) certified laboratories for analysis following ASTM D 4840 chain of custody procedures. The following field and laboratory procedures will be implemented to ensure that QAQCP objectives are met. 1.0 FIELD DOCUMENTATION AND INVESTIGATION REPORTING All information pertinent to the scope of work will be kept in a field log book/daily log. All field documentation forms will be recorded in ink and maintained for five years following the conclusion of the project. No documentation will be destroyed or discarded. If mistakes or errors are made on any field documentation form, the error will be crossed out using a single line through the incorrect data leaving the mistaken entry legible and the correction will be initialed and dated. All analytical data will be reviewed and validated for quality control by the accredited laboratory and Ground Zero Analysis, Inc. (Ground Zero). A report of findings and analytical testing will be prepared by Ground Zero following the completion of the soil and soil vapor sample collection. Information to be documented and reported includes at least the following: - Sample numbers - Locations of sample collection - Soil boring or well numbers, as applicable - Depths at which samples were obtained - Names of collectors - Dates and times of collection - Purpose of sample - Sample distribution (e.g. laboratory, archive, etc.) - Field observations - Field measurements (e.g. PID readings, pH, conductivity, water levels.) - Other data records (e.g. development log, soil sampling report, well log, etc.) 2.0 LABORATORY ANALYTICAL METHODS The primary analytical laboratory will be: 1. BC Labs of Bakersfield, California (FLAP #1186) for the analysis of the soil and soil vapor samples Soil samples will be collected in either 8 -ounce widemouth clear glass jars provided by the laboratory or in clean brass or stainless steel tubes. Screw on caps will be fitted with Teflon liners. Tubes will tightly capped and sealed. Analytical methods, containers, preservatives, and hold times to be used or that may be used during the soil sampling and analysis phase of the scope of work are summarized in Table 1. QAQC