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Table 2 Analytical Results for Groundwater 130 N. Hunter Street, Stockton, California Project: 2597.12 Sample Date Screen TPH Ethyl TPH Motor TPM Location Sampled Internal Gasoline Benzene Toluene benzene Xylenes MTBE DIPE ETBE TAME TBA Methanol Ethanol 1,2-DCA EDB TPH Diesel Oil Kerosene MW-4 12/15/04 < 50 < 0.5 < 0:5 < 0.5 < 1.0 < 0.5 < 1.0 < 0.5 c0.5 < 5:0 NA < 0.5 NA < 0.5 NA NA < 50 08/19/04 < 50 1 < 50 < SO i < 70 < 1 < 0.5 < 0.5 < 0.5 < 0.5 < 5 NA NA < 0.5 NA NA NA < 250 06/18/04 < 50IG < 0 < 0 < 1 < 0.5 < 0.5 < 0.5 < 0.5 < 5 NA NA < 0.5 NA NA NA < 250 03/24/04 < 50 < 0 c 0 < 1 < 0.5 < 0.5 < 0.5 < 0.5 < 5 NA NA < 0.5 NA NA NA < 250 - - 12/11/03 < 50 < 0 c 0 < 1 < 0.5 < 0.5 < 0.5 < 0.5 < 5 NA NA NA NA < 50 < 500 < 250 09/12/03 15 - 35 < 50 < 0 < 0 < 1 <. 0.5 < 0.5 < 0.5 < 0.5 < 5 NA NA NA NA < 50 < 500 < 250 05/09/03 < 50 < 0 < 0 < 1 c 0.5 < 0.5 < 0.5 < .5 < 5 NA NA 0.5 NA < 50 c 500 < 250 - 0 19/03 < 50 < 0 < 0 < 1 SK k5 0 < <i6 NA NA NA < 50 < 500 NA 11/25/02 < 50 < 0 < 0 < 1 < 0.5 < 0.5 < 0.5 < 0.5 < 5 NA NA ' NA NA < 50 < 500 NA 072402 < 50 < < 0.5 < 0.5 < 0.5 < 0.5 < 0.5 < 5 NA NA < 0.5 .NA<S < 50 < 500 1 NA SB2-GW-52 12/20/04 45 - 52 1 62 000 - 680 - 870 ' 51700 51700 - < 100 - < 200 < 100 - < 100 < 1 000 NA NA < 100 - < 100 - NA NA 680 * - SB3-GW-32 122104 27 - 32 820 - 13 < 0.5 - < 0.5 - < 1.0 - < 0.5 - < 1.0 - < 0.50 - < 0.50 - < 5.0 - NA NA c0.50 < 0.50 -- NA NA 270 * '- SB3-GW-60 1 21 04 56 - 60 91,000 - 9,400 - 860 5,400 11,000 < 100 - < 200- < 100 - < 100 _ < 1,000- NA NA < 100 < 100 NA NA 48 000 - SB4W-36 11/17104 31 - 36 4,100 4.0 0.84 3.3 < 1.0 < 0.5 < 1.0 < 0.50 < 0.50 < 5.0 < 10,000 < 25 < 0.50 < 0.50 NA NA 1 500 SB5B-GW-55 12121/04 50 - 55 6 700 - 8.2 - < 2.5 - c 2.5 - < 5.0 - 3.0 ' < 5.0 - < 2.5 - e 2.5 - < 25 -NA NA < 2.5 - <2.5 NA NA 47 000 * - - SB5-W-36 11/17/04 31 - 36 94 < 0.5 < 0.5 < 0.5 < 1.0 0.64 < 1.0 < 0.50 < 0.50 < 50 < 10 000 < 25 < 0.50 < 0.50 NA �NA < 50 SB6-GW-30 02/03/05 25 - 30 < 50 < 0.5 < 0.5 < 0.50 < 1.0 < 0.5 < 1.0 < 0.50 < 0.50 < 5.0 NA NA < 0.50 < 0.50 NA NA 58 SB6-GW-60 020305 55 - 60 22000 12 < 2.5 < 2.5 < 2.5 < 2.5 < 5.0 < 2.5 < IS < 25 NA NA < 2.5 < 2.5 NA NA 1500 * SB7-GW-30 02102/05 25 - 30 < 50 < 0.5 < oi Z0150 <1.0 < 0.5 < 1.0 < 0.50 < 0.50 < 5.0 NA NA 7o '56 < 0.50 NA NA 110 * SB7-60-GW 1 02102/05 55 - 60 4 000 50 2.3 1 2.5 3.9 1.5 < 1.0 < 0.50 < 0.50 < 5.0 NA NA < 0.50 < 0.50 01 NA NA 480 * Nd�88 -GW- 32( tz ll � 6 (1 g� 13 <a ,S < 0 "T </, 0 <0 ,5' < !a0 So ,S tu, S < sta to � Nµ coils /V Nj9- Z7O All results are reported in micrograms per liter (pg/L), which translates to parts per billion (ppb) Total Petroleum Hydrocarbons as Gasoline (TPH-g) and Benzene, toluene, e0rylbenze, xylenes (BTEX) analyzed by EPA Methods 8020/8015M or 82608 V r� /L Oxygenates: Methyl tenary butyl ether (MTBE), Di-isopropyl ether (DIPE), Ethyl-t-butyl ether (ETRE), Tert-amyl methyl ether (TAME), Tert-Butanol (TBA), Methanol, a Ethanol analyzed by EPA Method 8260B (�( 1,2-Dichlomethane (1,2-DCA) a 1,2-Dibromoethane (EOB) analyzed by EPA Method 8260B TPH-Diesel (TPH-d), TPH-Motor Oil (TPH-mo), a TPH-Kerosene (TPh-k) analyzed by EPA Method 8015M * The sample chromatogram does not resemble a typical kerosene chromatogram. All peaks were interegrated within the range. The result is an estimated value. NA - not analyzed Samples collected prior to November 2004 by Ramage Environmental, Rancho Murieta, CA Samples collected after November 2004 by Treadwell & Rollo, San Francisco, CA Bald value indicates a detection January 2008 2597.11 Data Tables Page 2 of 2