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<br /> TABLE 2 GROUNDWATER MONITORING DATA,FORMER EXXON RS 7-3942,4444 NORTH PERSHING AVENUE,STOCKTON,CALIFORNIA
<br /> Casing Depth Groundwater LPH Concentration /L
<br /> Well Elevation to Water Elevation Thickness Ethyl-
<br /> Number Date feet feet feet feet Benzene Toluene benzene Xylenes TPH-E MTBE
<br /> I
<br /> IPIA g 09/28/04 -- -- -- -- 2,610 14,400 2,590 13,300 78,000 h <0 5*
<br /> IPIA g 12/03/04 -- -- -- -- 1,980 18,900 5,920 28,800 250,000 h 360
<br /> IPIA 12/03/04 <50*
<br /> IPIA g 03/25/05 793 -- -- -- 924 5,790 1,790 6,480 55,200 h 154
<br /> IPIA 03/25/05 793 <5*
<br /> IPIA 06/22/05 793 -- -- -- -- -- -- -- -- --
<br /> IPIA g 06/23/05 793 -- -- -- 1,400 15,000 4,730 26,200 60,800 h <50
<br /> IPIA 10/13/05 793 -- -- -- 860 7,000 2,600 14,000 42,000 h <620/<250*
<br /> IPIA m 10/13/05 793 -- -- -- 860* 6,900* 2,300* 13,000* 45,000 h
<br /> IPIA 12/22/05 793 - - -- 470 4,600 1,500 11,000 38,000 h <620
<br /> IPIB 09/27/04 -- 2150 -- -- -- -- -- -- -- --
<br /> IPIB g 09/28/04 -- -- -- -- 5,470 18,800 2,280 11,200 87,200 h <0 5*
<br /> IPIB g 12/03/04 -- 2050 -- -- 7,760 25,000 2,930 14,500 154,000 h 100
<br /> IPIB 12/03/04 <50*
<br /> IPIB g 03/25/05 802 -- -- -- 4,800 19,200 2,710 17,400 99,400 h <50
<br /> IPIB 06/22/05 802 -- -_ -- -- -- -- --
<br /> IPIB g 06/23/05 802 -- -- -- 5,380 18,300 2,680 14,500 102,000 h 420
<br /> IPIB 06/23/05 802 <10*
<br /> IPIB 10/13/05 802 -- -- -- 4,300 20,000 2,200 12,000 59,000 h <1,200/<100*
<br /> IPIB a 10/13/05 802 -- -- -- 4,400* 20,000* 2,600* 11,000* 56,000 h
<br /> IPIB 12/22/05 802 - - -- 1,600 9,900 1,100 7,000 38,000 h <1,200
<br /> IP2A 09/27/04 -- -- -- -- -- -- -- --
<br /> IP2A g 09/28/04 -- -- -- -- 570 13,300 2,490 11,600 67,800 h <0 5*
<br /> IP2A g 12/03/04 -- -- -- -- 850 4,470 1,720 8,220 46,300 h 25 0
<br /> IP2A 12/03/04 <25*
<br /> IP2A g 03/25/05 755 -- -- -- 112 2,590 1,700 10,700 41,600 h 58 0
<br /> IP2A 03/25/05 7 55 <5*
<br /> IP2A 06/22/05 755 -- -- -- -- -- -- -- -- --
<br /> IP2A g 06/23/05 7 55 -- -- 660 1,120 1,340 6,680 27,500 h <5
<br /> IP2A 10/13/05 755 -- -- -- 200 2,800 1,200 4,200 17,000 h <250/<25*
<br /> IP2A k 10/13/05 755 -- -- -- 240* 3,000* 1,300* 4,600* 15,000 h
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