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11-19-1997 4:27PM FROM ENTECH ANALYTICAL 408 7351554 P_ 8 <br /> Certificate No.:2224 <br /> Expiration Date; 12/31198 <br /> Page 4 <br /> 17 Toxic Chemical EkMen <br /> As in wastewater(con[inued) <br /> 17.29 Titanium <br /> 17.30 Vanadium <br /> 17.31 Zinc <br /> 18 i Chemistr f Wa water easur nen Sc bin tion <br /> 18.1 EPA Method 624 <br /> 19 Organic Chemistry of Wa tenter(excluding measur&ments by GUMS connbinatlon) <br /> 19.1 EPA Method 601 <br /> 19.2 EPA Method 602 <br /> iiYi#Yik YiiYki Y#F##i#YFiY YYY4dF#fi YFiYf Yii FYiFiYkiSii YYi�#i#t Yii#i#Wii Fi YYYi YRF#iiiiii FF#Y#ii YYi FFi WY##F <br /> MUM) <br />