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i 4.0 QUALITY ASSURANCE PLAN The following sections describe field and analytical quality-assurance procedures to be followed during the described investigation 4.1 Sample Collection and Handling Protocol Proper sample collection and handling are essential to assure quality of data obtained from a sample Each sample will be collected in a brass tube, preserved correctly for the intended analysis and stored for no longer than the permissible holding time prior to analysts 4.2 Sample Identification and Chain of Custody Protocol Sample identification and chain of custody procedures are designed to assure sample quality and to document sample possession from the time of collection to the time of ultimate disposal The container for each sample submitted for analysts will have a label affixed with they identifying number or the number will be inscribed directly on the container, if feasible The analytical laboratory will assign a separate sample number unique to that samplelfor internal sample coordination and identification A description of the sample including the sample number and other pertinent information regarding its collection and/or geologic significance will be written in field notes and/or a geologic boring log being prepared by the site geologist These field documents will be kept in a permanent project file All samples will be analyzed by a State certified laboratory for the analyses requested A properly completed chain of custody form will be submitted to the analytical laboratory along with the sample The laboratory's assigned number will be properly entered on the form A quality control officer at the lab will verify integrity of samples submitted,proper sample volume, correctness of containers used, and properly executed chain of custody form ' Pertinent information will be entered into a log book kept by the laboratory 4.3 Analytical Quality Assurance In addition to routine calibration of analytical instruments with standards and blanks,'the analyst is required to run duplicates and spikes to assure an added measure of reliability and precision 50 SITE SAFETY PLAN A site specific Site Safety Plan (SSP) will be developed by Park to minimize the potential for accidents or potentially dangerous exposure to chemicals, as well as to identify the nearest emergency medical facility A copy of the SSP will be present on site during all field activities I • A 1125J1 WP 7