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Table B-1: Historical Groundwater Measurements and Analytical Results I SAMPLE LOCATION DATE SAMPLED DEPTH TO GROUNDWATER (Feet bgs) GROUNDWATER ELEVATION (Feet nut) TPH-K TPH-MO TPII-D TPH-G BENZENE TOLUENE ETHYL- BENZENE XYLENES MTBE DIPE ETBE TAME TBA 1,2-DCA EDB Naphthalene Method 8015M %1115M 81115M 0015M 00218 8021B 81121B /1121B 0260B 8260B 02608 X26013 82.6013 /260B 826013 / 2 6011 NICL None None 561.1gL' 5 801. 1.0 pg,L. 150 pg./L 301LpRiL 1.750 gg L _42..ps/L None None None 12 pg/ 0.5 pg,'L 0.05 pg/L 12/06/01 45.50 -26.86 NA NA NA 3,000 310 400 61 360 21 <2 2 2 < 20 <2 NA NA 03/29/02 44.53 -25.89 NA NA NA 68 IS 1.6 < 0.5 2.2 < 0.5 < 0.5 <0.5 <0.5 <5 <0,5 NA NA 05/06/02 44.69 -26.05 NA NA NA < 50 < 0.5 < 0.5 <0.5 < < 0.5 < 0.5 < 0.5 < 0.5 <5 < 0.5 NA NA 08/22/02 46.35 -27.71 NA NA NA < 50 < 0.5 < 0.5 <0.5 <0.5 < 0.5 < 0.5 < 0.5 < 0.5 <5 < 0.5 NA NA 11/26/02 47.44 -28.00 NA NA NA < 50 < 0.5 < 0.5 <0.5 < < 0.5 < 0.5 < 0.5 0.5 <3 < 0.5 NA NA 03/07/03 46.33 -27.69 NA NA NA 55 < 0.5 < 0.5 <0.5 < < 0.5 < 0.5 <0_S <0.5 <5 NA NA NA 05/09/03 46.08 -27.44 NA NA NA < 50 < 0.5 < 0.5 <0.5 09/12/03 47.81 -29.17 NA NA NA < 50 < 0.5 0.5 <0.5 < 0.5 < 0.5 < 0.5 < 0.5 <5 < 0.5 NA NA 12/19/03 48.38 -29.74 NA NA NA < 50 < 0.5 < 0.5 < 0.5 < < 0.5 < 0.5 0.5 0.5 <5 < 0.5 NA NA 03/24/04 47.00 -28.36 NA NA NA < 50 < 0.5 < 0.5 < 0.5 < = 0.5 < 0.5 0.5 < 0.5 5 .0 0.5 NA NA A NA NA < 50 < 0.5 < 0.5 .0 0 5 Cl < 0.5 < 0.5 < 0.5 < 0.5 <5 < 0.5 NA NA 08/23/04 48.33 -29.69 NA NA NA 0 50 < 0.5 < 0.5 < 0.5 0 I < 0.5 < 0.5 < 0.5 < 0.5 < 5 < 0.5 NA NA 12/29/04 40.78 -30.14 NA N.4 NA < 50 < 0.5 < 0.5 < 0.5 03/23/05 47.75 -29.11 NA NA NA < 50 < 0.5 < 0.5 < 0.5 06/29/05 46.18 -27.54 NA NA NA < 50 < 0.5 < 0.5 < 0.5 09/21/05 47.18 -28.54 NA NA NA < 50 < 0.5 < 0.5 < 0.5 < 1 < 0.5 < 1 < 1 I2/20/05 47.80 -29.16 NA NA NA < 50 < 0.5 0 0.5 < 0.5 0 I < 0.5 < 1 03/15/06 45.60 -26.96 NA NA NA < 50 < 0.5 < 0.5 0 0.5 < 1 < 0.5 06/21/06 42.52 -23.88 NA NA NA < 50 < 0.5 < 0.5 < 0.5 0 I < 0.5 < 1 09/20/06 42.51 -23.87 NA NA NA < 50 < 0.5 < 0.5 < 0.5 < 1 < 0.5 12/12/06 42.30 -23.66 NA NA NA < 50 < 0.5 < 0.5 < 0.5 < 1 < 0.5 < 1 < 1 .< 1 0 5 .0 1 NA NA 03/20/07 41.18 -22.54 NA NA NA < 50 < 0.5 < 0.5 < 0.5 0 1 < 0.5 06/11/07 40.74 -22.10 NA NA NA < 50 < 0.5 < 0.5 < 0.5 < 1 < 0.5 .< 1 < 1 09/25/07 41.40 -22.84 NA NA NA 0 50 < 0.5 < 0.5 < 0.5 12/04/07 41.64 -23.00 NA NA NA < 50 < 0.5 < 0.5 < 0.5 < 1 < 0.5 < 1 < 1 03/31/08 39.90 -21.26 NA NA NA < 50 < 0.5 .0 0.5 < 0.5 0 I < 0.5 < 1 0 1 0 1 < 5 < 1 < 0.5 NA 06/09/08 39.86 -21.22 N.4 NA NA < 50 < 0.5 < 0.5 0 0.5 < 1 < 0.5 < 1 0 1 < 1 < 5 < 1 < 0.5 NA 09/05/08 40.77 -22.13 NA NA NA < 50 0 0.5 < 0.5 < 0.5 11/20/08 41.61 -22.97 NA NA NA < 50 < 0.5 < 0.5 < 0.5 < 1 < 0.5 < 1 02/24/09 41.32 -22.68 NA NA NA < 50 < 0.5 < 0.5 < 0.5 0 I < 0.5 < 1 05/13/09 40.91 -22.27 NOT SAMPLED - WELL SAMPLED 131-ANNUALLY 10/20/09 42.66 -24.02 NOT SAMPLED - WELL SAMPLED BI-ANNUALLY 05/14/10 40.90 -22.26 NOT SAMPLED - WELL SAMPLED BI-A1VNUALLY 04/29/11 38.74 -20.10 NA I NA I NA 1<50 < 0.5 < 0.5 < 0.5 11/03/11 37.83 -19.19 NOT SAMPLED - WELL SAMPLED RI-ANNUALLY 04/17/12 36.89 -18.25 NOT SAMPLED - WELL SAMPLED 81-ANNUALLY 09/28/12 37.04 -18.40 NOT SAMPLED - WELL SAMPLED BI-ANNUALLY 03/20/13 35.96 -17.32 1 NA I NA I NA I < 50 I < 0.5 I < 0.5 too-5 I < 1 1 < 0.5 NA NA \ I NA NA 12/09/13 37.18 -18.54 NOT SAMPLED - WELL SAMPLED BI-ANNUALLY 04/04/14 36.59 -17.95 NOT SAMPLED - WELL SAMPLED BI-ANNUALLY 11/07/14 38.38 -19.74 NOT SAMPLED - WELL SAMPLED 81-ANNUALLY 05/15/15 38.02 -19.38 I NA I NA I NA I < 50 I < 0.5 1 < 0.5 1 < 0.5 I 11/16/15 40.55 -21.91 NOT SAMPLED - WELL SAMPLED 81-ANNUALLY 05/31/16 39.61 -20.97 I NA I NA I NA I< 50 I < 0.5 1 < 0.5 1 < 0.5 I 0 1 1< 0.5 NA NA NA NA NA NA <1.0 12/29/16 41.47 -22.83 NOT SAMPLED - WELL SAMPLED AANUALLY X:\Project \5000_prj \ 5960 SJC UST RFQ \ 5960C County of San Joaquin - SJC Public Works \ 5960C6Reports Mork Plan \Apo B Background \20161229_596005A Historic Data.xlsxTable B-1 3 of 8 ,\1W-3 18.64