Laserfiche WebLink
w �:?•s� c '� . <br /> Fm _Vr' t". i}"y�9''. T.". � jr "7..;xi kl� :. ,t�w' ,r. csx�R; ` � �1`�'` Y. `-I`r,..:f' `Kr.Er.d}. x:•""S's'✓U3x'i+'.rr, S' ,ijr-.., _u ,fid �ry <br /> � "� �("�'�`�, yy 1. 'Y �' "�"t�,, .s• ,�'�+�',s„ : n�'..' ,� -. �r'..m5w�h�.d?�? ,,r-,Y.,�r �.�+V .�,".�bs�,+� p.y: �r �r �f',. '•r <br /> � x �syY' ,�iY�J� „r } ,t M'4..vy s Yd.`n�ii7. y�•'f r Nh r' 7„�h M.tts [Y "'x +- ! i �,w :ten' <br /> 77`77 .7.a � t"=•s'Ir, <br />�r tl'W <br /> Y.vx'-.ti <br /> 10 August 1990 ., <br /> s Regional Bo..%rd Staff Recommendations rr=; <br /> preliminary Site Investigation <br /> s � <br /> EXk'I.it1ATIC!N FOR TABLE #f2: MINIMIFM W7 RIFTCATION ANALYSIS ^a n <br /> 7R. <br /> 1. OTHER m2THODQLOGIES are continually being developed, and as <br /> methods are accepted by EPA or DNS, they also can be used. <br /> 2, For DRINKING WATER SOURCES, EPA recommends thar. the 5 <br /> 00 <br /> series for volatile organics be used in preference to the 600 ' g <br /> series because the detection limits are ]ower and the QA/QS <br /> iw better. <br /> 3. APPROPRIATE S`PANDARDS for the material stored in the tank are <br /> r`' <br /> to be used for all analyses on Table $2. For instance, <br /> s2anonally, there may be five different Jet fuel mixtuzeS to <br /> c' be considered. �r � <br /> 4 TO AVOID FALSE POSITIVE detection of benzene, benzene-free <br />; \ solvents are to be used. <br /> 5 TOTAL PETROLEUM HYDRQCATZBONS (TPH) as gasoline (G) and diesel �fW <br /> E wL� <br /> res (volatile and extractible, respectively) are to be <br /> {D) rang <br /> (D)anarang and characterized by GCFTD with a fusod capillary <br /> yzed <br /> column and prepared by EPA method 5030 (purge and trap) for <br /> volatile hydrocarbons, or extracted by scr.ication using 3550 <br /> methodology for extractible hydrocarbons. Fused capillary <br /> columns are preferred to packed caluruis; a packed column may <br /> be used as a "first cut" with "dirty" samples or once the <br /> hydrocarbons have been characterized and proper QA1QC is <br /> followed. <br /> 6. TETRAETHYLLEAD (TEL) analysis may be required if total lead <br />? i= detected un]es the determination is made that the total <br /> lead concentration is geogenic (naturally occurring) . <br /> 7 . CHLORINATED HyDROCARBON5 (CL HC) and <br /> BENZENE, <br /> soil byLEPAEI XYLENE <br /> thod <br /> AND ETHYLBENZENE {STX&E) are aor18240 and for vrater 601 And <br /> 8010 and 8020, reapecti.vely, ( ) <br /> 602, respectzvaly, (or 624) . <br /> 8. OIL AND GREASE O & G) may be used when heavy, straight chain <br /> hydrocarbons may be present. Infrared -analysis by method. <br /> 418.3 may also ba accoptabie for O & G if proper standards <br /> are used. "standard Methods" 17th Edition 1 89 has than ed <br /> the 503 series to 20. <br /> 9, p3YACTICAL QUAIITITATION pEPORTING LIMITS are influenced by <br /> matrix problems and laboratory <br /> QA/QC procedures. Following <br /> are the Practical QuantitatiOri heporting Limits: <br /> SOIL PPM WATER PPB <br /> TPH G 1.0 50.0 <br /> 50.0 <br /> TnH D 1.0 0.0 <br /> STX&E 0.005 <br /> O & G 50.0 5,000.0 <br /> 1B <br />.a. <br />