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TABLE 1
<br />HISTORICAL GROUNDWATER DATA - MONITORING WELLS
<br />RANCH MARKET
<br />23569 S. SANTA FE ROAD, RIVERBANK, CA
<br />Page 1 of 10
<br />Well ID Date
<br />Depth to
<br />Water
<br />Water
<br />Elevation TPH-G Benzene Toluene
<br />Ethyl
<br />benzene
<br />Total
<br />Xylenes MTBE
<br />TOC (feet) (feet MSL)(µg/L) (µg/L) (µg/L) (µg/L) (µg/L) (µg/L)
<br />MW-1 12/09/98 26.36 79.38 65,900 5,120 7,390 696 5,020 840
<br />105.74 12/25/99 27.66 78.08 72,900 8,150 10,700 1,020 4,750 210
<br />04/06/00 25.87 79.87 24,000 3,300 2,100 130 3,800 320
<br />08/16/00 27.99 77.75 80,000 13,000 13,000 1,200 7,400 1,600
<br />09/01/00
<br />11/16/00 27.29 78.45 6,800 880 630 34 740 83
<br />01/03/01 27.30 78.44 14,000 3,000 2,100 150 1,600 320
<br />04/11/01 26.86 78.88 22,000 4,600 3,200 220 1,900 410
<br />07/03/01 27.89 77.85 35,000 6,500 5,600 490 2,700 900
<br />10/01/01 28.51 77.23 22,000 4,500 3,700 400 1,800 570
<br />01/03/02 27.23 78.51 5,000 540 470 32 600 29
<br />04/05/02 27.43 78.31 47,000 8,700 6,100 550 4,600 280
<br />07/12/02 28.68 77.06 60,000 11,000 7,400 830 4,400 1,500
<br />10/01/02 29.15 76.59 13,000 2,000 1,800 170 1,500 250
<br />105.74 01/10/03 27.89 77.85 1,100 110 120 3.0 170 62
<br />04/01/03 27.99 77.75 140 <0.5 <0.5 <0.5 <0.5 52
<br />07/02/03 28.22 77.52 1,100 240 12 1.8 120 28.2
<br />10/02/03 29.51 76.23
<br />01/09/04 28.50 77.24 29,000 <0.5 <0.5 <0.5 580 17.0
<br />04/08/04 28.22 77.52 4,400 36 200 25 1,760 52.0
<br />07/01/04 28.85 76.89 95 <0.5 <0.5 <0.5 <0.5 1.30
<br />10/13/04 29.68 76.06 140 0.84 1.5 <0.5 6.3 <0.5
<br />01/05/05 28.99 76.75 8,600 45 29 <0.5 179 <0.5
<br />04/06/05 28.22 77.52 130 <0.5 <0.5 <0.5 <0.5 6.2
<br />07/13/05 29.32 76.42 89 <0.5 <0.5 <0.5 <0.5 19.0
<br />10/12/05 29.40 76.34 340 35 24 5.5 19 3.0
<br />01/11/06 26.10 79.64 51 <0.5 <0.5 <0.5 <0.5 9.4
<br />03/15/06 25.85 79.89
<br />06/08/06 25.24 80.50 1,000 78 18 4.8 55 61.0
<br />08/23/06 27.83 77.91 1,800 250 30 19 74 77.0
<br />12/14/06 28.08 77.66 500 31.5 1.3 2.2 10.7 24.8
<br />03/26/07 27.76 77.98 220 11 <0.5 <0.5 <0.5 8.7
<br />06/19/07 29.05 76.69 150 22 0.59 <0.5 7.4 6.5
<br />02/11/08 28.72 77.02 <50 <0.5 <0.5 <0.5 <0.5 <0.5
<br />09/19/08 31.18 74.56 350 31 13 8.8 53 4.7
<br />05/10/13 29.02 76.72 <50 <0.5 <0.5 <0.5 <0.5 <0.5
<br />12/04/14 32.93 72.81 810 18 5.2 15 69 0.9
<br />05/14/15 33.23 72.51 900 23 7.7 16 97 <0.5
<br />01/12/16 33.40 72.34 1,400 71 25 44 190 4.4
<br />11/02/16 33.62 72.12 360 33 5.6 6.5 64 <0.50
<br />03/09/17 32.09 73.65 98 7.2 2.2 3.3 15 4.0
<br />09/29/17 32.88 72.86 99 3.9 0.11 <0.50 <1.0 22
<br />01/31/18 31.26 74.48 120 13 0.10 0.96 2.6 2.2
<br />08/12/18 33.68 72.06 77 7.2 <0.50 1.4 3.3 1.8
<br />12/30/19 31.96 73.78 130 27 0.22J 1.5 1.9 7.8
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