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v Eh 3u )08 • xX Table I H Summary of Results of Ground Water Sampling Chevron Service Station 0 9-4275 2905 Wast 8enjdmin Holt Drive, Stockton, California Concentrations in parts per billion (ppb) WELL DATE OF CASING OEPTH GROUND 7PH-G TOG ID SAMPLING/ ELEVATION TO WATER 8 T E X 1,2 1,2 FM LRB MONITORING WATER ELEVATION DCEa DCB MW-5 03/22/89 3.79 17,18 -13.39 4000 Nb(3OOO 35 MW-5 06/12/89 3.79 17.86 -14.01 900 73 1.10 760 ND(2.O 10 20 CCAS MW-5 09/07/09 3.79 19,11 -15,32 410 - 24 2 2 53 ND(O.2 ND(O.1 ND(1 CCAS MW-5D 09/07/89 3.79 19.11 -15.32 ^ 16 4 12 50 ND(O,2 ND(O.2 ND(1 CCAS MW-5 12/18/89 3.79 380 --- 15 4 11 49 ND(O.2 ND(O.2 ND(1 CCAS MW-5 03/10/90 3.79 18.63 -14.64 2900 --- 24 22 100 590 18_19 -14,46 MW-5 07/03/90 3.79 3400 --- 37 29 120 --- --- --- PACE 19,43 -i5.G4 5500 ___ 630 PALE MW-5 10/19/90 3.79 20.04 -16.25 65 89 200 1200 �--- - _ _ MW-5 01/17/91 3.79 5900 --- 55 81 140 1100 pASE 19.90 -16.19 4900 --- 26 51 -__ --- "- PACE 144 030 -^- TB 03/22/89 NA NA NA NJ(SDO -- SAL T8 06/12/89 NA NA NA --- ND(O.2- NOCO.2 ND(O,2 ND(O.4 ND(O.1 NO(O.2 ND0 CCAS TB 09/07/89 NA ND(5O --- ND(O.2 ND(O.5 ND(O.1 ND(O.2 ND(O.1 ND(O.1 ND(O.5 CCAS TO 12/18/89 NA NA NA ND15O ND(1.0 ND(O.5 NO(0.1 NDCO.2 ND(O,1 ND(O.1 ND(O.5 CCAr, 78 {i]/20/90 NA ND(5O ND(O,5 ND(O.5 ND(O.5 ND(O.5 ND(O.5 ND(O.5 TO NA NA NO(5O --- ND(O.5 NO(O,5 ND( PACE O7/O]/9O NA NA NA ND(SO ND(O.5 ND(O.5 ND<O,5 ND(O.5 ND(O.2 PACE TB 10/19/90 NA NA NA '-" ND(O.5 NDtO.S ND<O,5 ND(O,5 __ T8 01/17/91 NA NO(5O --- ND(O.5 Nb(O.5 ND1O,5 NDtO.5 _ _ - PACL NA NA ND(5O --- ND(O,5 NO(O.5 ND(O.5 ND(O.5 - _ `-- TAr,r RINSATE O7/O3/90 NA -_- SAL RINSATE 10/19/90 NA NA NA NO(5O --- ND(O.5 NDtO.S Nb<0.5 N0(O.5 _ _ RINSATE 01/17/91 NA NA NA NA ND(5O - ND(O.5 ND(O.5 ND(O.5 ND(O.5 - - - PACE NA ND(5O --- `-- --- PACE ND(O.5 N�(O.5 ND1O.5 ND(O.5 - SAL EXPLANATION OF ABBREVIATIONS: ------------------------- TPH-G :Total Petroleum Hydrocarbons as Gasoline (EPA method 8015 modified) - :Not Analyzed/Not Measured TOG =Total Oil and Grease (EPA method 5030 LSO+E) D :Duplicate B :Benzene (EPA method 8020 or 8240) NA :Not Apgllcable/Not Available r T :Toluene (EPA method 8020 or 8240) ND :Not Detected >? E :Ethylbenzene (EPA method 8020 or 8240) TO :Trip Blank X :Xylenes (EPA method 8020 or 8240) SAL :Superior Analytical Labs 1,2-DCEa :I. 2-Dichloroethone CCAS :Central Coast Analytical Service 1;2-DC13 :I, 2-Dichlorobenzene PACE :PACE Labe F113 :Freon 1?3 ' :Does not match typical gasoline pattern p Note: Top of Casing-and Ground Water Elevations are expressed as feet above mean sea level (NGVD - 1929), Llcm ---------^-- --------------------------------- --------^---------------------------------------------------------------- �. n OB-Her-91 r R .