Laserfiche WebLink
1 <br /> ' Laboratory and field handling procedures can be monitored by including <br /> quality control (QC) samples for analysis with the other samples collected. <br /> Examples of different types of QC samples are as follows <br /> • Trip blank - This is used for purgable organic compounds only They are <br /> ' prepared at the analytical laboratory by laboratory personnel Trip blanks <br /> travel to the project site with the sample containers to be filled They are <br /> not opened, and are returned to the laboratory with the samples collected <br /> at the site for analysis <br /> • Field blank - This is prepared in the field using distilled water They are to <br /> ' accompany the samples collected at the site to the laboratory, to be <br /> analyzed for the same chemical parameters as those collected at the site <br /> ' • Duplicates - These are to be collected at the same time that the required <br /> samples are being collected They are typically only collected from one <br /> 1 well per sampling event, and may be collected from a different well each <br /> time <br /> Generally, trip blanks and field blanks check field handling and <br /> transportation procedures The duplicate samples generally checks the <br /> laboratory procedures The number and types of QC samples will be <br /> determined by CGI, depending on site conditions and regulatory <br /> requirements. <br /> I � <br /> II , li I <br /> I , <br /> I <br /> I ' <br /> I I C I I I I I I I <br /> II 4� I E IIEII <br /> �I III III , I I 'III I <br /> I f <br /> A l� I Il I<,f�i <br /> �I`I ' <br /> IPIII <br /> I <br /> CLEARWATER GROUP,INC November 9, 1994 I <br /> { k II i I I I <br /> I <br /> EE I I I, <br /> I' II rlrc � IF I I I��II��II� OI `It <br /> IIIc II I I I+r�" I' I I EI� �Ir�' `E III' I` I a lil k,ll SIE°�`H�It ` I i rah, fl i ItF ll l{ I i!}I I' fll�ll �II tl�l I i I II"lIIIIIII�II III r <br /> ISI ` II Illd i f �� ` II Ilikl <br />