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ANALYTICAL ACEMODS Samples collected as part of the monitoring program shall be analyzed consistent with accepted analytical procedures. Laboratories selected to perform the analytical work will be certified by the California Department of Heath Services (DHS) for hazardous waste testing. The analytical test methods to be used and the maximum sample holding times that shall be observed are discussed in the main text of this report. Method Detection Limits (MDL) MDLs shall be derived by the laboratory for each analytical procedure, according to State of California laboratory accreditation procedures. These MDLs shall reflect the detection and quantitation capabilities of the specific analytical procedure and equipment used by the tab, rather than simply being quoted from U.S. EPA analytical method manuals. If the lab suspects that, due to a change in matrix or other effects, the true detection limit or quantitation limit for a particular analytical run differs significantly from the laboratory-derived MDL values, the results shall be flagged accordingly, along with an estimate of the detection limit and quantitation limit actually achieved. The MDL shall always be calculated such that it represents a concentration associated with a 99% reliability of a non-zero result. QUA= ASSXMANM!!ZLAJM CO OL (QALQO_ Quality Assurance/Quality Control (QA/QC) measures shall be taken to confirm the integrity of the field and laboratory data generated during the monitoring program. The procedures used to assess data quality are described in this section. An evaluation of the laboratory QA data shall be included in the technical reports. Field Quality Assurance Procedures Quality assurance procedures for the sampling program shall consist of collecting field equipment blanks, trip blanks, and blind duplicate samples. One field equipment blank per day shall be collected to assess the influence from the ambient atmosphere and sampling equipment on sample quality. One trip blank per sampling event shall be analyzed. The trip blank shall remained with the bottles used for sampling for the duration of the sampling event, and at no time will the trip blank opened. The trip blank provides check on bottle cleaning procedures and sample transport conditions. In order to provided a check on the precision (reproducibility) of chemical analyses, one blind duplicate sample shall be collected and analyzed during each 1_WR0JECr0WVA*'aM-4.TCY D-5 Novon*w 23;1993