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Table 2 HISTORICAL GROUNDWATER ANALYTICAL RESULTS AND MONITORING DATA FORMER CHEVRON SERVICE STATION NO 9-6465 5608 NORTH PERSHING AVENUE,STOCKTON,CA w .n EfFiYL-- ELEVATION BENZENE TOLUENE BENZENE XYLENES TPH-G 11.2-DCA �DTW 5PT WTE OC A b b b est feet feet MW-10 741 03/19/90 04/11/90 NO NO NO NO - -- -- -- -- 05/09/90 NO NO NO NO NO -- 3538 NA -27 97 10/22/90 1 1 NO i NO 37.35 NA -29 94 01/19/91 07 3 2 12 110 -- 3750 NA -30 09 07/21191 NO NO ND NO NO - 3809 NA -30 68 10/17/91 NO NO ND NO NO - 3822 NA -3081 01/09/92 NO NO NO NO NO - 3644 NA -2903 03/19/92 NO NO NO NO NO - 3584 NA -2843 07/01/92 NO NO NO NO NO - 3758 NA -3017 09/16/92 NO NO NO NO ND -- 3886 NA -3145 01105/93 ND NO ND NO NO - 3721 NA -2980 06/24/93 NO NO ND NO NO - 3402 000 -2661 09/07193 NO ND ND NO NO - 3514 000 --2773 MW-11 784 03/19/90 -- -- -- -- -- -- -- -- -- 04/11190 NO NO ND NO - 05/09/90 NO NO NO NO NO -- 3658 NA -2874 08/17/90 0.5 NO ND NO 83 10/22/90 01/18/91 1 4 2 17 140 - 3692 NA -3108 07/21/91 NO NO NO NO NO -- 3957 NA -3173 10/17191 NO NO NO NO NO -- 39 77 NA -3193 01/09/92 NO NO NO NO NO -- 37 85 NA -3001 03/19/92 NO NO NO NO NO =- 37 20 NA -2936 07/01/92 ND NO ND NO NA 3912 NA -3128 09/16/92 NO NO ND NO NO - 4047 NA -32 63 01/05/93 NO NO NO NO NO - 3860 NA -3076 06124/93 NO NO NO NO NO - 3534 000 -2750 09102/93 1 NDI NQ1 ND1 NQ1 NO -- 3660 000 -2876 Explanation Page 5 of 5 All elevations are given as feet above mean sea level TPH-G-Total petroleum hydrocarbons-as-gasoline 1,2-DCA= 1 2-Dichloroethane DTW-Depth to water SPT- Separate-phase hydrocarbon thickness WTE=Water table elevation TOC -Top of casing ppb- Parts per billion NA- Not available NO = Not detected at or above minimum quanbtabon limits -- - Not analyzed,not gauged Note See laboratory reports for minimum quantitatton limits WTABI%W1 GROUNDWATER TECHNOLOGY