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<br />CDRE LABORATORIES <br />~Q:~~UA.LI TY A.~S SUR~.~~A{"CE METHODS ~ ~ ~~ <br />R~~E~F~~E~R E N C~E S ~ ~A~N D N~O T E S. ~ ~ ~ ~ ~~ <br />Report Date: 04/02/96 .~ ~. <br />This flag is also used when estimating the <br />concentration of a tentatively identified compound. <br />X - Indicates that a surrogate recovery is outside the <br />specified quality control limits. <br />Y - Used to identify a spike or spike duplicate <br />recovery that is outside the specified quality control <br />limits. <br />Z - Indicates a relative percent difference for a spike <br />and spike duplicate is outside the specified quality <br />control limits. <br />+ - Indicates a relative percent difference for a <br />duplicate analysis is outside the specified quality <br />control limits. <br />" - Used to indicate that a standard is outside <br />specified quality control limits. <br />Page 5 <br />m..+nr...n.~.>.,rv.we.~w..~~.~..~~..~,M~w~,..~.,m..o.~~.s+e.ro...o.+.<m.s..,.....~me..~,w rr..vnr ~.. m.o. a...room <br />..e~..w. m. an..w.>co. umw~ w. um..~..c... ~.+~ ~ w....> ~w..~o~. ww s.m. u.. uw..n.m~.e.e....w.~ m w ooaa.n em. m.m. a va~i.s~ v <br />.. a. ~ m. u a.v ~. air .. s..n ~ m.~.w...,.w.w ~.,m..~a,~,e,oe .Y ~ r~.s~ ~ ~ w m o ~v....a s. on....e... ~ m~ a ce. ~~ <br />