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. TAO 3 •
<br /> GROUNDWATER ANALYTICAL RESULTS
<br /> 1999 SUBSURFACE INVESTIGATIONS "GRAB" SAMPLES
<br /> Gene Gabbard Inc.
<br /> 640 N Et Dorado Street, Stockton, CA
<br /> (results in parts per billion)
<br /> Gasollntr
<br /> DATE SAMPLE ID TPHg TPHd TRPH Benzene Toluene benzene Xylenes V©Cs Oxygenate Lead
<br /> AddiMres
<br /> 1119199 GASB1-26GW 2,700a,b,c,d 35,000c,d,fg 140,000c,d 23 096 35 39 31 B,31 C,72G,210J,91K <51<25 <5 0
<br /> 170 520 95 520 110A,21 B,35D, 190E,
<br /> GASB3-31GW 4,500c,e 510,000c,f,h,i 16,000,000c 180j 640J 110j 570j 19F,44H,550I,660J,33K, <17/<85 96
<br /> 170L,270M,97N
<br /> 10/26/99 GAB SB4 GW 26 <50 110 i,h 0,000 <0 5 <0 5 <0 5 <0 5 ND <51<25 99
<br /> GAB SB5 GW 26 340e 8201,E <1,000 78 13 13 19 1 6P,23E,2 7Q,2 7F,32R, <51<25 39
<br /> 6?J 14 13 22J 33G,39K, 15M,2SN,
<br /> GAB SB6 GW 29 <50 1601 <1,000 <0 5 <0 5 <0 5 <0 5 ND <5/<25 120
<br /> 11
<br /> 10/27/99 GAB SB7 GW 24 <50 <50 <1,000 <0 5 1 7 <0 5 <0 5 ND <5/<25 550
<br /> GAB SB8 GW 26 <50 <50 1 <1,000 <0 5 080 <0 5 <0 5 ND <5/<25 330
<br /> NOTES
<br /> Benzene,toluene,ethylbenzene,xylenes analyzed by EPA 8020/8260 A = Acetone
<br /> Gasoline Oxygenate Additives analyzed by EPA 8260 B - n-Butyl benzene
<br /> TPHg = Total Petroleum Hydrocarbons as gasoline(EPA 8015m) C = sec-Butyl benzene
<br /> TPHd = Total Petroleum Hydrocarbons as diesel(EPA 8015m) D - tert-Butyl benzene
<br /> TRPH = Total Recoverable Petroleum Hydrocarbons(EPA418 1/5520) E = I,2-Dichlorobenzene
<br /> VOCs = Volatile Organic Constituents(EPA 8260) F = 1,4-Dichlorobenzene
<br /> < = Not detected at reported detection limit G = Isopropylbenzene
<br /> ND = Not detected(detection limit vanes,see laboratory report) H Methyl butyl ketone
<br /> a = Heavier gasoline range compounds are significant(aged gasoline?) I - Methyl isobutyl ketone
<br /> b - No recognizable pattern J = Naphthalene
<br /> c = Lighter than water imnuscible sheen is present K - n-Propyl benzene
<br /> d = Liquid sample that contains greater than-5 vol %sediment L = 1,2,3-Tnehloropropane
<br /> e = Unmodified or weakly modified gasoline is significant M = 1,2,4-Tnmethylbenzene
<br /> f = Gasoline range compounds are significant N = 1,3,5-Tnmethylbenzene
<br /> g = Unmodified or weakly modified diesel is significant P = Chlorobenzene
<br /> h = Oil range compounds are significant Q = 1,3-Dichlorobenzene
<br /> t = Diesel range compounds are significant,no recognizable patten R = cis-1,2-Dcchloroethene
<br /> 3 = Result from EPA Method 8260
<br /> h = Approximate concentration,mterferance from gasoline and lieavy
<br /> hydrocarbon range constituents
<br /> 1 - Surrogate diluted out of range
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