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1 <br />' Ouarterly Monitoring Report I inuaiy 2001 <br /> Canepa s Car Wash(P-icitic Avenue) <br /> Page-7 <br /> 1 TABLE 3 <br /> GROUNDWATER SAMPLE ANALYTICAL RESULTS FOR SOIL VAPOR <br />' EXTRACTION WELLS <br /> C unstituent a T E X MTBE TPH-G <br />' <br /> FPA Method (602)/ (602)/ (602)/ (602)/ (602)/(8260 (5030) <br /> (802 t 13) (802 1 B) (802113) (8021 B) )/(8021 B) <br /> DcteLt]0o Lnntts 03 03 03 06 1 0 005 <br />' µg/L µg/L µg/L µg/L }Lg/L nig/L <br /> 5V-r 1/16/97 41000 17000 3300 6200 [1 400] 120 <br />' <br /> 1/15100 1 100 34 120 250 1 100V 4 1 <br /> SV-2 4/23/98 49,000 66 000 3200 17 000 26,000*v 270 <br /> SV-3 7/18/97 71 000 73 000 3 900 19 000 [35 0001 280 <br /> 10/14/99 9 600 2 100 440 1 400 14 000♦ 25 <br /> SV-4 7/22/98 71 000 47 000 1 700 9 400 170 00 *v 390 <br />' 7/11/00 SGOT I I0j, 341' 60: 46 OOOP 08 <br /> SV-5 10/22/97 55 000 73 000 3 9011 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 8/]/96 91 000 75 000 3 000 18 000 1 800 360 <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 6 400*v 310 <br /> SV-9 412197 25 000 ND 2 300 1 900 79,000 53 <br /> 4/12/00 ND(150) ND(150) ND(150) ND(300) 9 700♦ ND(25) <br /> B T C X=he.nienL toluene ethyl be11L6nL and rvlene ND = none de(LLtcd at of above I iboratory reported detection <br /> Irnttt <br /> TPE C-G=total pr,tiulunn hydroc.arhons quantified as gasul uic ND(X)=none detected to a]eve(01 X <br /> MTBE=methyl tertiary butyl adhcr *=detection limit r used date to elevated petroleum hydrocarbon result <br /> NA=not to,,ted for this analyte <br /> [x]=EPA Method 602 analysts indicates a concuttration of v result is not confirmed by EPA Method 8260 however f otute awilvvs by EPA <br /> Method 8260 may md[c itc that MTBE is not present <br /> V=other oxygenates/idditives were analyzed by EPA Method 8260 and were not detected at or above the laboratory reported detection limits <br /> * =as 01 the fourth quarter 1999 MTBE was analyzed by EPA Method 602 groundwater monitoring for gasoline oxygenates/additives other <br /> than M l 13E was discontinued <br /> T=as of the third quarter 2000 MTBE and BTEX were analyzed by EPA Method 8021 B <br /> 5 2 3 DISCUSSION OF OTI4ER ANALYTE CONCENTRATIONS <br /> Concentrations of toluene, ethyl benzene, total xylenes, and TPH-G in gioundwater samples collected <br /> from MW-1 have decreased over time, while only concentrations of toluene have decreased in <br /> groundwater samples collected fioni MW-2 Concentrations of ethyl benzene, total xylenes, and TPH-G <br /> Have shown increases in groundwater samples collected from monitor well MW-2 Therefore these <br /> • increased concentrations with higher groundwater elevations indicate groundwater contact with <br /> additional source contamination Because the monitor well screens are drowned, the first water in contact <br /> with this additional sow ce of contamination is not being sampled <br /> Ielk <br /> L� CONDOR <br />