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rr r� r� r �r �■r �r r r ■r rr rr rr �r rr M r■� � ir Table IA Historical Groundwater Analytical Data 7 Eleven Store#14117 2725 Country Club Boulevard Stockton California Well IDI Ethyl- MTBE Dissolved Elevation Date Benzene Toluene benzene Xylenes TPF!-G 8021 B 8260 TBA DIPE ETRE TAME 1,2-DCA EDB Oxygen DTW SPT WTE (TOC) (pgL) (pgL) (pgL) (pgL) (PgL) (PgL) I (pgL) (pgL) (pgL) (pgL) (paL1 (pgL) (pgL) (mg/L) (feet) feet) (feet) MW-5 153 11/05/01 <0 5 <0 51 <0 5 <0 5 <50 <5 <20 <5 <5 <5 <5 <5 0 9 973 000 -820 126 01/08/02 <5 <5 <5 <5 <50 -- <10 23 <5 <5 <5 -- -- 08 660 000 -5 34 04/12/02 <0 5 <0 5 <0 5 <0 5 <50 <5 <0 5 <5 <05 <05 <0 5 -- 08 722 000 -596 MW-6 07/09/02 <0 5 <'0-5 <0 5 <0 5 <50 <5 <0 5 -<5i <F5- <0 5 <0 5 08 -T4-0 -T-00 7614 1 26 11105/01 <0 5 28 <0 5 099 <50 - <5 <201 <5 <5 <5 <5 <5 10 944 10 00 -818 1 19 01/08/02 <5 <5 <5 <5 <50 -- <10 <20 <5 <5 <5 __ -- 1 0 --79TF0 00 -635 04/12/02 <0 5 <0 5 <0 5 <0 5 <50 <5 <0 5 <5 <05 <05 <0 5 - -- 12 7 26 0 00 -607 07/09/02 <0 5 <0 5 <0 5 <0 5 <50 <5 <0 5 <5 <0 5 <0 5 <0 5 -- - 10 5 35 0 00 -416 MW-7 119 11/05/01 <0 5 <0 5 <0 5 <0 5 <50 <5 <20 <5 <5 <5 153 01/08/02 -- __ <5 <5 10 11020 10001 -901 __ — 04/12/02 <0 5 <0 509 — 000 -- <0 5 <0 5 <50 <5 24 <5 <05 <05 <0 5 --- 10- 747 000 -594 07/09/02 <0 5 :Z-0-5 <0 5 <0 5 <50 <5 24 <5 <05 Explanation TBA=tert butanol 1 2-DCA=1 2-dichloroethane pg/L=Micrograms per liter DIPE=dnsopropyl ether EDB=1 2 dibromoethane mg/L=Milligrams per liter ETBE=ethyl tert-butyl ether MTBE=methyl tert-butyl ether TAME=tent amylmethyl ether TPH-G=total petroleum hydrocarbons-as-gasoline --=Not availabWnot analyzed 'Method Blank Contamination The associated method blank contains the target analyte at a reportable level 7-11\1 411 7 tbl xls 3 of 3 08-12-02