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S w � <br /> i5 I I ' � �o 111 I ❑' I � , S , ' ," I � , + <br /> JI I' 1 if Iii 4 <br /> Section No 11 <br /> Revision,No 0 . <br /> 1' Date' September S, 1991 <br /> Page 1 lof 8 <br /> ' <br /> 11 0 QUALITY CONTROL CHECKS AND FREQUENCY <br /> 11 1 Field Quality Control'`Checks 1 „ <br /> 1 <br /> Field quality control,tchecks' 'refer to the efforts shade to,,evaluate the <br /> ' q 11f, <br /> „accuracy, , reproducibility ,or representatives of, the system parameters being <br /> measured-" -^Normally—rela ed,to�'�samples-fork-subsequent--•chemical--�analysis, <br /> control refers to the preparation and subsequent analysis� of <br /> field quality <br /> , f . r 1' II , i + , 6 � <br /> travel blank's, field bhanks,° field,duplicates, rfield splits and blind spikes <br /> It <br /> When related to physical measurements, field quality control generally refers <br /> to duplicate or spli.tsmeasurement of parameters of interest The magnitude _ <br /> 1 <br /> I t I 3 <br /> or frequency of zvarious, fi.eld quality contro11 l checks will be specified in the S <br /> 'sampling asid 'analysis plan' In the following sections', protocols for the <br /> - - - ---o'1=� preparation/collection of`field-quality.-control samples are,,provided,s as-is, <br /> I ` <br /> a r commended- frequency' for-implementation This -frequency-' is fincluded'as a° <br /> best practices guide to be, followed when the sampling and analysis plan is <br /> either not specific' regarding the scope of the `quality control program or j <br /> � 1 1 <br /> 1 , <br /> 'when the sampling and 'analysis plan specifies the frequencies in the QAPP be <br /> ucilized It is important that all project team members be knowledgeable <br /> I , <br /> _ r regarding the rscope of the quality, control ,program The , Pro.j ect Manager _ <br /> should be consulted when questions regarding the scope of the quality control <br /> program arise <br /> I , I <br /> 11 1 1 Travel Blanks <br /> Travel blanks are samples which are prepared by the laboratory or field t ' <br /> personnel by filling a representative sample container with material which is <br /> • <br /> I I I <br /> 11-1 <br /> 1 ' <br /> 1 ' <br />