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rt f t . ,. <br /> _ - - '- � t �y T �, . .r.zr,�+"' '�, g4 t�-= - fir' ;6• _ ii>y, � � +i` �' ' e e. <br /> 25`October 1997 s <br /> 'AGE-NC Project No. 97-'03'61, <br /> Page 4 off <br /> _ � :� �x=-.. .M .Y.,, �• " � J 1. i s -z h, <br /> -hethyl-tert-butyl, ether{MTBE);;tertiary butyl alc6hol_.{TBA), di=isgpropyl etherF(DIPE), ethyl' <br /> . =-_tertiary'butyl.ether(ETBEI'and'tertiary.amyl methyl ether(TAME)in accordance with EPA methods - <br /> 9015nV5030 and 8020/602 and 8260/8240.= <br /> t S <br /> -. -. Soil�was extruded fiom the' brass sleeves and screened for fire presence of-organic.vapor, <br /> f <br /> using an organic vapor -meter_equipped with a photo`ionization detector (PID),pre-calibrated to <br /> isobutylene {PID), and the-readings were.recorded oil_the boring logs The soilwas described in., <br /> s rr accordance with the-Unified:Soil Classification System _r• _ ah � s <br /> . _ - - - _ ;,* -ms's_ _ - �°.. •�: �_.. .. _ <br /> LL� ' � f - _ s4r � r r a k .-tT� Y-' j Y - •r s i_ t _ "_ <br /> 3A. 'GRAB,GROUND WATER SAMPLE COLLECTION � � ' <br /> pro <br /> ' -A grab ground water sample was to]I ecte&froni the first water encountered in probe boring P1 using_ <br /> a pre-cleaned;one-half-inch-PVC screen and-one-quarter-_inch bailer:At the request_o,f..tlie PHS-EHD..'°' , <br /> a discrete water sample was collected from_ a'depth of 35 feet bsg-using_a-Geoprol e water sampling - <br /> x >.assembly: Probe rods were extended-into-ground•,water..to a',depth of 35 feet bsg,and then pulled back �$ h <br /> rt to`expose•a water-sampler'scr'een inter'vai .Ground-water was„allowed to enter.the sampler; and <br /> samples were etrieved using a modified PVC tubing.bailer. <br /> r <br /> Both samples,were tran”sfeired-into-4�0=m1,,,EPA-approved'VOA vials coritaining hydrochloric acid .;'` V <br /> .. <br /> for sample preservation The:saiiiples� ere 41abeled;>placed in a chilled container, and were :K <br /> r. = transported to MAI under_chain-of=custod Tl e water.sam les were areal zed for-:total Petroleum . '.. <br /> Y amples Y . <br /> ,L hydrocarbons quantified -a§ gasoline'(.TPH-g), for' •volatile aromatics (benzene, Toluene, ethyl -; <br /> 1._ 'benzene. -and .xylenes:.'BTE&X),"and other oxygeriated fuel additives;:methyl tett-butyl ether s �� <br /> =_(MTBE);tertia ' butyl,alcohol (TBA), di--isoprop '1 etlier- DIPS 'eth 1`terti r'bdt `Tether ETBE ..:_, <br /> } and tertiary amyl:iilethyl ether TAM iii accordance.witli EPA methods 8015n>/5030 aril 8020L602 <br /> 8260/8240: <br /> 4.0. FINDINGS_ ¢; <br /> 4`,1. STRATIGRAPHY 7. <br /> ZL <br /> :-During the installation of;the,soil probe laoring, browri;:moist silty.sand was ei eounteredbetween <br /> depths of Sand-15 Feet bsg A'thin.layer bfclay rx�as,observed at depths-6f47 to 19-fe6vand sand was <br /> encountered'between depths of 20,and 1 feet bsg A`soil boring log is-included in Appendix k!.. <br /> -rldtan[eriGeotovironmentil,Inc ' <br /> i'ar <br /> 71 <br /> .,. _ ..- ' ,-. r _ ; �7•L s+ fir � Y _ _ 'T—� � cc.: ,..- - L �]'� . , � - kc { <br />