Laserfiche WebLink
Hi <br /> 1. <br /> -Znseco <br /> Accuracy is measured by Percent Recovery as in: <br /> a = measured con <br /> la recovery x loo <br /> very <br /> (actual concentration) <br /> Precision is measured using duplicate tests by Relative Percent Difference <br /> (RPD) as in: <br /> RFD = (To recover_i test 1 - % recover test_21 x 100 <br /> ,., (% recovery test 1 + ye recovery test 2)/2 <br /> Control limits for accuracy (percent recovery) are based on the average, <br /> historical percent recovery +/-3 standard deviation % —i's. Control limits <br /> for precision {relative percent difference) range friii; 0 (identical <br /> duplicate DCS results) to the average, historical relative percent <br /> difference + 3 standard deviation units.enough In cases where there is not <br /> 1oalimits ry limits are set, with the <br /> approval oftheQualityAssurancedepartment. <br /> IY Anal sis Results <br /> Te methods may include minor modifications of published EPA Methods such <br /> l <br /> e reporting limits or parafneter lists. Reporting limits are adjusted to <br /> reflect dilution of the sample, when appropriate. Saeid and waste samples <br /> are reported on an "as received" basis; i.e., no correction is made far <br /> moisture content, unless the method requires or the client requests that <br /> such correction be made. <br /> Results are on the attached data sheets. <br />