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Table 3-1 <br /> Detected Volatile Organic Compounds Analytical Data <br /> ARCO Service Station No 4493 <br /> 205 N Center Street,Stockton,California <br /> Tert- Dibromo- Di- 1,1- cis-1,2- <br /> Bromo- n-Butyl- sec-Butyl- Butyl Chloro- chloro- bromo- Dichloro- Drchloro- <br /> Weil Date Acetone form benzene benzene benzene form methane methane ethane ethene <br /> Number Sampled (pgIL) (►g/L) (N9/L) (pg/L) (p9/L) (/►gam (lr9/L) (p91L) _ _(p9/L) (lug/L) <br /> MW-10M 6/12/2002 — -- — — — — -- -- -' -- — <br /> 9/16/2002 -- — <10 <10 <10 <10 -- — <10 16 <br /> 12/5/2002 -- <10 <10 <10 <10 <10 <10 <10 <10 12 <br /> 3/14/2003 — <0 5 <0 5 <0 5 <0 5 <0 5 <0 5 <0 5 <0 5 13 <br /> 6/9/2003 <10 <1 0 <1 0 <1 0 <1 0 <1 0 <1 0 <1 0 <1 0 90 <br /> 9/25/2003 <10 <1 0 <1 0 <1 0 <1 0 <1 0 <1 0 <1 0 <1 0 80 <br /> 12/23/2003 <10 <10 <10 <10 <10 <10 <10 <10 <10 91 <br /> 3/8/2004 — -- <1 0 <1 0 <1 0 <1 0 -- -- -- 85 <br /> 6/9/2004 -- <1 0 <1 0 <1 0 <1 0 — - -- 89 <br /> MW-10D 6/12/2002 — -- — — -- -- -- -- — - <br /> 9/16/2002 - -- <0 5 <0 5 <0 5 <0 5 — — <0 5 38 <br /> 12/5/2002 — <0 5 <0 5 <0 5 <05 <0 5 <0 5 <0 5 <0 5 14 <br /> 3/14/2003 — <0 5 <0 5 <0 5 <0 5 <0 5 <0 5 <0 5 <0 5 19 <br /> 6/9/2003 <10 <1 0 <1 0 <1 0 <10 <1 0 <1 0 <1 0 <1 0 63 <br /> 9/25/2003 <10 <10 <10 <10 <10 <10 <10 <10 <10 41 <br /> 12/23/2003 <10 <10 <10 <10 <10 <10 <10 <10 <10 11 <br /> 3/8/2004 -- <10 <10 <10 <10 -- — — 13 <br /> 6/9/2004 — -- <1 0 <1 0 <1 0 34 — — — <1 0 <br /> MW-11M 12/5/2002 - <1 0 <1 0 <1 0 <1 0 <1 0 <1 0 <1 0 <1 0 10 <br /> 3/14/2003 -- <10 <10 <10 <10 <10 <10 <10 <10 <10 <br /> 6/9/2003 <50 <50 <50 <5 0 <50 <50 <50 <5 0 <5 0 <5 0 <br /> 9/25/2003 <50 <50 <50 <50 <50 <50 <50 <5 0 <5 0 <50 <br /> 12/23/2003 <10 <10 <10 <10 <10 <10 <10 <10 <10 <10 <br /> 3/8/2004 - -- <50 <5 0 <50 <5 0 -- -- — <5 0 <br /> 6/9/2004 — -- <10 <10 <10 <10 -- — — <10 <br /> MW-11 D 12/5/2002 21 <05 <0 5 <0 5 <0 5 067 <0 5 <0 5 14 <br /> 3/14/2003 — <0 5 <0 5 <0 5 <0 5 <0 5 <0 5 1 1 <0 5 1 9 <br /> 6/9/2003 <10 <10 <10 <10 <10 <10 <10 <10 <10 16 <br /> 9/25/2003 <10 <10 <10 <10 <10 <10 <10 <10 <10 17 <br /> 12/23/2003 <10 <1 0 <1 0 <1 0 <1 0 <1 0 <1 0 <1 0 <1 0 24 <br /> 3/8/2004 -- -- <10 <10 <10 <10 — — -- 11 <br /> 6/9/2004 — — <10 <10 <10 <10 — -- -- 15 <br /> MW-12D 12/23/2003 <10 <1 0 <1 0 <1 0 <1 0 <1 0 <1 0 <1 0 <1 0 29 <br /> 3/8/2004 — <1 0 <1 0 <1 0 <1 0 -- — -- 34 <br /> 6/9/2004 — -- <1 0 <1 0 <1 0 <1 0 -- -- — 27 <br /> MW-13M 6/9/2004 — — <10 <10 <10 <10 — -- -- 28 <br /> MWA 3D 6/9/2004 — — <1 0 <1 0 <1 0 <1 0 -- -- — `12 <br /> Notes <br /> Irg/L=micrograms per liter <br /> <=below given laboratory detection limit <br /> --=not measured or analyzed <br /> All samples are ran full scan Method 8260E-Analytes consistently non-detect are not listed <br /> Data Qualifier Definitions <br /> U The analyte was analyzed for, but was not detected above the sample reporting limit <br /> J The analyte was positively identified,the associated numerical value is the approximate concentration of the analyte to the sample <br /> N The analysis indicates the presence of an analyte for which there is presumptive evidence to make a"tentative identification" <br /> NJ The analysis indicates the presence of an analyte that has been"tentatively identified"and the associated numerical <br /> value represents its approximate concentration <br /> UJ The analyte was not detected above the reported sample reporting limit However,the reported reporting limit is approximate and <br /> may or may not represent the actual limit of quantitation necessary to accurately and precisely measure the analyte in the sample <br /> R The sample results are refected due to identification or other analytical issues <br /> ND Not detected above reported detection limit <br /> K 1WpracesM,15 BP ARCM04493Y0uarterlyl3 QTR 9314493 GWMR 1004 Page 4 of 4 <br />