Laserfiche WebLink
SOP No. 11.0 Sample Management <br />taped shut. Samples collected in glass containers will be packed in foam liners and bubble <br />packing or Styrofoam peanuts to ensure that no breakage occurs during shipment. A temperature <br />blank should be included in each cooler. Samples will be sent to the analytical laboratory via <br />Federal Express or equivalent. Sample shipments will be insured if needed. Shipping receipts <br />should be retained for documentation and sample tracking. <br />A completed chain-of-custody (COC) form (see Figure 2) for each cooler will be placed in a <br />Ziploc bag and placed inside of the cooler. Coolers will be wrapped with strapping tape at two <br />locations to secure lids. A signed and dated custody seal shall be placed on the outside of each <br />cooler in such a manner as to allow detection of tampering (e.g., the seal must be broken to open <br />the cooler). An example custody seal is included as Figure 4. <br />5.5 HOLDING TIME REQUIREMENTS <br />The holding time is specified as the maximum allowable time between sample collection and <br />analysis and/or extraction, based on the analyte of interest, stability factors, and preservation <br />methods. Allowable holding times for chemical analysis parameters are listed in the Sampling <br />Analysis Plan. Samples should be sent to the laboratory after collection in sufficient time to <br />allow the laboratory to meet holding time requirements. <br />6.0 QUALITY CONTROL REQUIREMENTS <br />QC requirements relevant to analysis of environmental samples shall be followed during <br />analytical activities to meet the quality objectives and criteria. The purpose of this QC program <br />is to produce data of known and documented quality that satisfy the project objectives and that <br />meet or exceed the requirements of the standard methods of analysis. <br />6.1 QC SAMPLES <br />A number of QC samples will be employed to assess various data quality parameters, such as <br />representativeness of the environmental samples, the precision of sample collection and handling <br />procedures, the thoroughness of the field equipment decontamination procedures, and the <br />accuracy of laboratory analysis. A summary of QC samples for all chemical analysis methods is <br />included in the Sampling Analysis Plan. Types of QC samples are discussed below and the <br />number of these samples is also summarized in the Sampling Analysis Plan. <br />6.1.1 Matrix Spike/Matrix Spike Duplicate <br />Matrix spike (MS) and matrix spike duplicate (MSD) samples are prepared by spiking additional <br />aliquots of sample with known concentrations of all project target analytes. <br />The sample to be used for the MS/MSD analyses shall be designated on the chain of custody and <br />additional sample volume shall be submitted, as necessary. The MS/MSD results are used to <br />document the bias of a method due to sample matrix. Consequently, MSs and MSDs are not <br />used to control the analytical process. A minimum of one MS and one MSD sample shall be <br />analyzed for every 20 environmental samples of a given matrix. Alternately, a laboratory may <br />4/23/07 Page 4 of 7 R Squared Inc. <br />Attachment A