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II
<br /> TABLE 4
<br /> GROUNDWATER GRAB ANALYTICAL RESULTS
<br /> {. 541 West Grant Line Road
<br /> Tracy,California
<br /> i ''`
<br /> Date Screened Interval TPH-Gasoline TPH-Diesel TPH-Jet Fuel TPH-Motor Oil MTBE Benzene Etbylbenzene Toluene Tatal Xylenes
<br /> Sample No Sampled (feet bgs) (µ91L) ()Ag/L) (µg/L) {1,91L) (µg/L) (19/L) (µg/L) (Rg/L) (µ91L)
<br /> ' Tap Water PRGs(µg/L) NA NA NA NA 13 034 29 720 , 210
<br /> Groundwater ESLs(µg/L) 100 100 100 100 5 1 30 4 r 13
<br /> B-1 8/30/00 9 to 14 2,800 540 - 410 < 10 <05 < 10 99 <0 5
<br /> ' B-2 8/30/00 9 t 14 <50 62 - i <250 <50 <05 <05 <05 105
<br /> B-3 8/30/00 9 to 14 2,600 610 - 310 <5 0 19 110 84 �� 180
<br /> B-4 8/30/00 9 to 14 50,000 15,000 = 1,500 < 100 420 2,300 1,500 9,900
<br /> B-5 8/30/00 9 to 14 450 170 410 <5 0 <0 5 14 70 68
<br /> B-6 8130/00 9 to 14 1,800 880 - 480 <50 <05 23 29 13
<br /> TR-1 9124/03 9 to 12 <50 91 Y <50 i <300 <2 0 <0 50 <0 50 <0 50 <0 50
<br /> TR-4 9/23/03 11 to 16 1,200 LY 1,400 LY 1,400 <300 <2 0 <0 50 <0 50 0 56 C 179 C
<br /> TR-5 9/23/03 9 to 14 9,700 LY 2,000 LY 2,300 <300 7 3 C <0 50 84 <0 50 , 4 4 C
<br /> ' TR-7 9/23/03 8 to 13 29,000 6,400 LY* 7000* 1,500 Y* <20 <5 0 610 <5 0 2,070
<br /> TR-7 9/23/03 14 to 19 26,000 4,200 LY 4,900 , <600 <20 43 1,200 <5 0 i 2,110
<br /> TR-10 9125/03 8 to 13 2,200 HY 1,300 LY 1,500 + <750 <2 0 <0 50 65 4 7 C 63
<br /> iTR-11 9/24/03 8 5 to 11 5 12,000 2,700 LY 3,100 320 Y <10 92 450 810 !I 1,5$0
<br /> ` TR-12 9125103 7 to 12 33,000 Y 6,800 LY 7,900 <710 110 <13 1,400 50 C l 510
<br /> TR-14 9/24/03 7 to 12 6,400* 2,900 LY 3,200 <300 5 0 C* <0 5* 52* <0 5* 4 2 C*
<br /> '. TR-14-d 9/24/03 16 to 19 <50 100 Y 70 Y <300 <2 0 <0 5 <0 5 <0 5 <0 5
<br /> TR-16 9/25/03 7 to 12 9,500 LY 1,000 HLY 600 <710 28C <5 0 <5 0 <5 0 16C
<br /> ' TR-17 9/24/03 7 to 12 42,000 8,900 LY 10,000 <600 <40 87C 610 <10 11 C
<br /> TR-18 9/24/03 7 to 12 42,000 29,000 LY 32,000' <1,500 <40 <10 150 <10 12 C
<br /> TR-18 9/24/03 12 5 to 17.5 9,600* 4,100 LY 4,500 , <300 12 C* <0 50* 23 C* <0 50* 144C*
<br /> ' TR-19 9/24/03 7 to 12 530 640 LY 620 <300 <2 0 <0 50 <0 50 <0 50 0 52 C
<br /> TR-20 9/24103 7 to 12 <50 <50 <50 <300 <2 0 <0 50 <0 50 <0 50 4 <050
<br /> TR-21 9/24/03 7 to 12 <50 100 Y 53 Y <300 <2 0 <0 50 <0 50 <0 54 <0 50
<br /> TR-22 9/25/03 7 to 12 900,000 Y 17,000 LY 19,000 <1,900 3,400 C 2,500 C 13,000 2,500 C 16,100 C
<br /> TR-23 9/24/03 7 to 12 42,000 4,300 LY 4,400 <1,900 <80 2,400 2,400 370 9,300
<br /> TR-24 9/24/03 7 to 12 3,400 610 Y 430 Y < <1,900 <2 0 9 0 C 33 4 2 C 44 1
<br /> ' TR-24-de 9124/03 16 to 19 20,000 11,000 LY 12,0001 11300 Y <10 25C 880 8 8 C 1,000
<br /> TR-25 9/25/03 7 to 12 150,000 H 340,000 LY 390,000 <38,000 <2,000 <500 1,800 <500 '14,990 C
<br /> ' TR-26 9/25/03 7 to 12 26,000 H 21,000 LY 24,000 <1,900 <400 <100 2,700 <100 11100
<br /> TR-27 9/25/03 7 to 12 1,900 L 630 LY 610 <710 <20 <5 0 <5 0 9 7 C <50
<br /> ,
<br /> Notes. Laboratoa Qualifiers,
<br /> ' Groundwater grab samples provide qualitative data H=Heavier hydrocarbons contributed to the quantitation
<br /> All concentrations are in micrograms per liter(µg/L)=parts per billion(ppb) L=Lighter hydrocarbons contributed to the quantitation
<br /> Bold indicates a detection above the reporting limit Y=Sample exhibits chromatographic pattern which does not resemble standard r
<br /> ' TPH=total petroleum hydrocarbons C=Presence confirmed,but RPD between columns exceeds 40%
<br /> MTBE=methyl-tertiary-butyl-ether *= Surrogate recovery was below acceptance limits,the results may be negatively bused
<br /> -=not analyzed +
<br /> NA=not available
<br /> ' bgs=below ground surface
<br /> PRGs=Preliminary Remedial Goals for Tap Water
<br /> ESLs=Environmental screening Levels for groundwater that is a current
<br /> or potential source of drinking water(Table A in SFRWQCB,2003)
<br /> Table 4
<br /> Treadwell&Rollo,Inc 1215/03
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