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20 <br />COMPOUND <br /> ZDDT IPCB plcene Oieltlrin Entlrin a-BHC y-BHC HCB dn°ar dChlo? - fiber- N CM. dIb? e NOW Sum <br />lion <br />1 <br />- <br />2 I _ V1, M L L <br />3 <br />4 j <br />5 <br />6 <br />7 <br /> <br /> 4 - -4 <br />10 I <br />12 <br />13 <br />14 <br />15 <br /> <br />7 <br />1 <br />le - <br />19 _ <br />20 S <br />21 <br />- ? i <br />22 <br />.. <br />23 <br />Z4 <br />? <br />45 <br /> <br />26 ? <br />27 <br />26 <br />- <br />29 <br />30 <br />+-L <br />31 <br />32 <br />33 <br />34 I <br />35 <br />36 <br />37 <br />36 <br />39 <br />90 - - - ?? - <br />11 /. <br />42 <br />- - - - - <br />43 - <br />44 <br />45 <br /> <br />- ll <br />47 T t h <br /> <br />48 <br />/ <br />49 <br /> <br />51 <br />52 - <br />53 <br />Sr <br />ss <br />56 . <br />57 <br />s9 <br />Fig. 4. Percentage of samples from National Pesticide Monitoring Program (NPMP) stations <br />(station numbers in left-hand column) equaling or exceeding criteria of the National <br />Academy of Science-National Academy of Engineers for minimum acceptable whole- <br />body organochlorine residues, 1976-77 through 1978-79. EDDT = p,p'-homologs of <br />DDE, DDD, and DDT. EPCB = Aroclors 1242, 1248, 1254, and 1260. Heptachlor <br />includes heptachlor epoxide. Sum represents the total of toxaphene, dieldrin, endrin, <br />BHC (a and -y-isomers), all chlordanes, and dacthal.