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M—MOM _ rte- F �� -a ss <br /> F r <br /> r <br /> 4 <br /> 3.3 LABORATORY ANALYSES <br /> i - <br /> All samples will be analyzed by EPA-or California-approved procedures. The analyses <br /> will be carried out by CH2M HILL's laboratory in Redding,California. This laboratory <br /> i is certified by the State of California to conduct the analyses specified in this work plan. <br /> Analytical parameters to be analyzed are based on the requiretr_ents .of the Tri- <br /> 1� Regional Board Staff Recommendations for Preliminary Evaluation and Investigation of <br /> 1 Underground Tank Site manual. <br /> Samples will be analyzed for the parameters listed in Table 3-1. Sample/Container <br /> i preservatian and holding time requirements are also shown in Table 3-1. after samples <br /> are collected in the appropriate containers and 'abeled, the containers will be placed in <br /> f ziplock bag: and placed in an ire-filled chest or cooler. Water sample bottles will be <br /> -+ packaged securely with either bubble wrap or vermiculite to reduce chances of bottle <br /> r� <br /> breakage. Ice or blue ice will be placed on top of the samples. <br /> `" All appropriate sample documentation will be laced in a d <br /> p ztplock bag ar.,9 taped to the <br /> inside lid of the cooler. The cooler will then be sealed with custody seals and strapping <br /> 1° tape. Coolers will be couriered by the CH2M HILL laboratory or shipped via over- <br /> night courier (Federal Express or Greyhound) to the analytical laboratory. <br /> 3.4 DATA 'REVIEW AND ANALYSTS <br /> 17 <br /> r . <br /> Data for all parameters will undergo two levels of review and validation: by the Tabora- <br /> tory and by CH2M HILL. Data will.be reviewed according to the guidelines outlined <br /> t- below and described in detail in Section 4.0. Data will be reviewed with regare to the <br /> following: <br /> Analytical methodology <br /> Detection limits <br /> • Blanks for contamination <br /> • Accuracy and precision <br /> The review process includes flagging data with qualifiers. Commonly used 'qualifiers <br /> g include: <br /> I = 1~-stimated, usable for limited purposes. The data are qualitatively, but <br /> ( not quantitatively, acceptable. <br /> R = Rejected, unusable. The data are qualitatively and quantitatively unac- <br /> ceptable. <br /> ' <br /> ceptable. i <br /> Cr' <br /> 1 <br /> sF031604%WF1\W7S1 3-6 <br />