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1 <br />1 <br />1 <br />1 <br />1 <br />1 <br />1 <br />1 <br />1 <br />1 <br />1 <br />1 <br />i <br />1 <br />1 <br />1 <br />1 <br />1 <br />1 <br />Table 9a <br />DATA ACCURACY <br />Parameter <br />Sampl a <br />Date <br />Vol <br />VC <br />at i 1 e Organic <br />BENZ <br />Cmumd-l— <br />PCE <br />CCL4 <br />�.j <br />CHCL3 <br />CRM2 Concentration <br />-- <br />110 <br />106 <br />97 <br />97 <br />100 <br />VOC Concentration <br />(ppb) <br />2/18/88 <br />107 <br />88 <br />77 <br />80 <br />103 <br />Recovery4 (percent) <br />97 <br />83 <br />79 <br />82 <br />103 <br />VOC Concentration <br />(ppb) <br />2/19/88 <br />110 <br />99 <br />86 <br />90 <br />104 <br />Recovery (percent) <br />100 <br />93 <br />89 <br />93 <br />104 <br />VOC Concentration <br />(ppb) <br />3/4/88 <br />107 <br />91 <br />80 <br />85 <br />100 <br />Recovery (percent) <br />97 <br />86 <br />82 <br />88 <br />100 <br />VOC Concentration <br />(ppb) <br />3/6/88 <br />114 <br />107 <br />97 <br />98 <br />105 <br />Recovery (percent) <br />104 <br />101 <br />100 <br />101 <br />105 <br />VOC Concentration <br />(ppb) <br />4/7/88 <br />85 <br />83 <br />87 <br />78 <br />91 <br />Recovery (percent) <br />77 <br />78 <br />90 <br />80 <br />91. <br />VOC Concentration <br />(ppb) <br />5/26/88 <br />101 <br />101 <br />93 <br />102 <br />106 <br />Recovery (percent) <br />92 <br />95 <br />96 <br />105 <br />106 <br />Mean Recovery <br />(percent) <br />95 <br />89 <br />89 <br />92 <br />102 <br />Mean Accuracy 5 <br />-5 <br />-11 <br />-11 <br />-8 <br />2 <br />(percent) <br />Standard Deviation6 <br />(percent) <br />9 <br />9 <br />8 <br />10 <br />6 <br />Rev. 0 09/20/88 <br />