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Eatcch Analytical Labs, Inc. <br />525 Del Rey Avenue. Suite E <br />Sunnyvale. CA 94086 <br />QUALITY CONTROL RESULTS SUMMARY <br />Volatile Organic Compounds <br />QC Batch d: SGCM5990206 <br />Matrix: Soil Date analyzed: 02!08/99 <br />Units: µg/Kg Spiked Sample. Blank Spike <br />1,1-01chlometkne <br />✓twin I -cert -butt' I other <br />Method M : <br />SA <br />SR <br />SP <br />SP <br />SPD : <br />SPD <br />RPD <br />: QC <br />LIMITS <br />µ8 K8: I+g'Kg: <br />µ8/l(g: <br />%R : <br />PIVK9: <br />%R <br />Spike Duplicate % Recovery <br />RPD <br />8240/8260 <br />18240/8260] <br />25 <br />ttiD ( <br />12 i <br />88 <br />21Mal <br />86 <br />1 2.3 <br />ZS <br />50-150 <br />18240/8260; <br />25 ; <br />I <br />ND ! <br />22 <br />88 <br />20 <br />79 <br />10.6 <br />25 <br />50.150 <br />25 <br />ND <br />24 ' <br />98 <br />24 <br />94 <br />3.8 <br />25 <br />50-150 <br />18240/82601 <br />8240/8260? <br />25 <br />25 j <br />ND 1 <br />ND t <br />23 <br />24 i <br />91 <br />23 <br />92 <br />0.4 <br />1 25 <br />50-150 <br />8240/82601 <br />25 <br />ND <br />25 <br />98 <br />24 <br />94 <br />3.8 <br />25 <br />50-150 <br />too <br />24 <br />98 <br />2.8 <br />i 25 ; <br />50.150 <br />Voter ICS and LCSD results repand jot the following Parameter: <br />all <br />Acceptable LCS and LCSD results are mporred when matrix Interferences cause MS and 11lSD results +o fat/ ou+side <br />established QC limits. <br />Definition of Terms <br />na: <br />Not Analyzed in QC batch <br />SA: <br />Spike Added <br />SR: <br />Sample Result <br />RPD(%): <br />Duplicate Analysis - Relative PerLent Difference <br />SP: <br />Spike Result <br />SP (%R): <br />Spike % Recovery <br />SPD: <br />Spike Duplicate Result <br />SPD (%R): <br />Spike Duplicate % Recovery <br />NC: <br />Not Calculated <br />