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<br />' Quarterly Monitoring Report October 2000
<br /> . Canepa s Car Wash(Pacific Avenue)
<br /> Page-7
<br />' TABLE 3
<br /> LABORATORY ANALYTICAL RESULTS FOR SOIL VAPOR EXTRACTION WELLS
<br />' Constituent B T E X MTBE TPH-G
<br /> EPA Method (602)/ (602)/ (602)/ (602)1 (602)/(8260) (5030)
<br />' (8021B) (8021B) (802113) (8021B) /(80218)
<br /> Detection Limits 03 03 03 06 1 0 0 05
<br /> lLg/L 99/1- Ag/L pg/L 118/1- mg/L
<br /> SV-1 1/16/97 41,000 17,000 3,300 6,200 [1 4001 120
<br /> 1/15/00 1,100 34 120 250 1,100v 41
<br /> SV-2 4/23/98 49,000 66 000 3,200 17,000 26,000*v 270
<br /> SV-3 7/18197 71,000 73,000 3 900 19,000 [35,0001 280
<br />' 10/14/99 9,600 2,100 440 I,400 14,000* 25
<br /> SV-4 7/22/98 71,000 47 000 1,700 9,400 170 000*v 390
<br /> 7/11/00 560.' 110P 34.1' 603 46,000.' 0 8
<br /> SV-5 10/22/97 55,000 73,000 3,900 19,000 37,000*v 290
<br /> SV-6 4/21/99 65,000 27,000 2,800 13,000 8,600*v 200
<br />'•� SV-7 811196 91,000 75,000 3,000 18,000 7,800 360
<br /> 10/23/98 90,000 77 000 3,300 18,000 1,800*v 360
<br /> SV-8 1/21/98 87,000 67,000 3,200 17,000 6400*v 310
<br /> SV-9 4/2197 25,000 ND 2,300 1900 79,000 53
<br /> 4/12/00 ND(150) ND(150) ND(150) ND(300) 9,700♦ ND(25)
<br /> B,T,E,X=benzene toluene ethyl benzene and xylene ND=none detected at or above laboratory reported detection limit
<br />' TPH-G=total petroleum hydrocarbons quantified as gasoline ND(X)=none detected to a level of X
<br /> MTBE=methyl tertiary butyl ether *=detection lima raised due to elevated petroleum hydrocarbon result
<br /> NA=not tested for this analyte
<br /> [x1=EPA Method 602 an clysis indicates a concentration of x result is not confirmed by EPA Method 8260, however Future analysis by EPA
<br /> Method 8260 may indicate that MTBE is not present
<br /> v=other oxygenates/additives were analyzed by EPA Method 8260 and were not detected at or above the laboratory reported detection limits
<br /> * =as of the tourth quarter 1999 MTBE was analyzed by EPA Method 602,groundwater monitoring for gasoline oxygenates/additives other
<br /> than MTBE was discontinued
<br /> T-as of the third quarter 2000,MTBE and BTEX were analyzed by EPA Method 8021 B
<br /> i G 1 I 1%WQd"UTQQTfl17kT !1T' r„rrTrr'n A rT A 7 AmrT0 /�/1TTe'rikTrr" A rrrr\IkTC
<br /> JLJ LIF]/_.UFJ FJ1Ll1� Vl Vi11L1\hl\ti1.�11Lil 4Vi��,L1\11\t\11V1\J
<br /> Concentrations of toluene, ethyl benzene, total xylenes, and TPH-G in MW-1 have decreased over time,
<br /> while only concentrations of toluene have decreased for MW-2 Concentrations of ethyl benzene, total
<br /> xylenes, and TPH-G have shown Increases in monitor well MW-2 Therefore these increased
<br /> concentrations with higher groundwater elevations Indicate groundwater contact with an additive source
<br /> As the wells are drowned, we are not sampling the first water in contact with this additive source
<br /> %U;o"
<br /> �� CONDOR
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