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according o the uality Assurance The water sample is collected, labeled, and h evendis disposed tof acc�ng to regulatoryplan. Water generated during the monitmonitoringtang accepted method pertaining to the site. UALITY ASSURANCE PLAN Procedures to provide data quality should be established lans andnondocufa mented SO ctivt conditions adverse to quality, such as deficiencies, de material, services, and/or equipment, can be promptly identified and corrected. GeneralSam le Collection and Handlin Procedures Each P Pro er collection and handling are essential to ensure the quality of a sample. sample is collected in a suitable container, presetthe maximum allofor hwable holding atime. and stored prior to analysis for no longer than les used on this project can Details on the procedures for collection and handling of same be found in this section. Soil and Water Sample Labeling and Preservation le identification number, job identification Label information includes a unique sump are laced in a Ziploc® number, date, and time. Arte c chestcooled toing all approximatell and water ysamples Celsius. Upon arriving at type bag and placed in ani refrigerator cooled to approximately Stratus' office the samples are transferred to a locked re re ed analysis and is noted or, 4° Celsius. Chemical preservation is controlled by t b rethe�rlabaratory accompany the the chain-of-custody form. Trip blanks supplied y groundwater sample containers and groundwater samples. Upon recovery, the sample container is sealed to minimize the potential of volatilization p lin tubes are typically s. and crass-contamination prior to chemical anlaat c caps. The ample is then placed in a closed at each end with Teflon sheeting and p p Zi p loc® type bag and sealed. The sample is labeled he refrigerated cal aboraporyimately 4° Celsius for delivery,under strict chain-of-custody,to t Sample Identification and ChaiU_of_CUsto4y Procedures Sample identification and chain-of-custody palysisrocedures document sample possession from ttediner the time of collection to ultimate disposal. Each sampe ta ntify the jab number, sampler, date sand ttirnefor afasample has a label affixed to ide collection, and a sample number unique to that sample• This information, in addition to a , field measurements made, sampling methodology, names of description of the same le on-site personnel, and any other pertinent field observations, is recorded on the borehole a certified laboratory. log or in the field records. The samples are analyzed by a Californi is used to record possession of the sample from time of form A chain-of-custody When the samples are shipped, the person in collection to its arrival at the laboratory. signing the chain-of custody form and icustody of there relinquishes the samples by gn g Page 2