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Table 7 <br /> Historical Benzene Concentrations in Groundwater <br /> . The Earthgrains Company <br /> Stockton,California <br />' Monitoring Well ID/Concentration(ug1l) <br /> Date MW-1 MW-2 MW-3 MW-4 MW-5 MW-6 MW-7 MW-8 MW-9 MW-10 MW-11 MW-12 MW-13 <br /> 7110187 6 800 ND(0 3) ND(0 3) 75 <br />' 4126188 2 300 19 ND(0 3) <br /> 3119190 5,120 ND(0 3) ND(0 3) ND(0 3) ND(0 3) ND(D 3) 558 <br /> 12/20/90 7,100 ND(0 3) ND(0 3) ND(0 3) ND(0 3) <br /> 4/9/921 1,620 8 ND(0 3) ND(0 3) ND(0 5) <br />' 6119192 4 720 ND(0 3) <br /> 12/23/92 2,650 ND(0 5) <br /> 417193 2,300 ND(0 3) ND(0 3) <br /> 7130193 1 900 ND(0 3) ND(0 3) ND(0 3) <br />' 10/21/93 2,200 ND(0 3) ND(0 3) <br /> 12/29/93 1,700 ND(0 3) ND(0 3) <br /> 3/231941 2000 ND(0 3) ND(0 3) 230 ND(0 3) 1 ND(0 5) ND(0 5) 17 ND(0 5) ND(D 5) 99 <br /> 617194 1 500 046 ND(0 3) 210 ND(0 3) ND(0 3) ND(0 3) 43 052 045 150 <br />' 918194 1 500 21 ND(0 3) 180 ND(0 3) ND(0 3) 052 92 ND(0 3) ND(0 3) 160 <br /> 2112196 2 400 ND(0 3) ND(0 3) 75 ND(0 3) ND(0 3) ND(0 3) ND(0 3) 3 1 49 <br /> 5114196 960 ND(0 5) ND(0 5) 66 ND(0 5) ND(0 5) 12 ND(0 5) 74 65 <br /> 9118196 890 ND(0 5) ND(0 5) ND(0 5) ND(0 5) ND(0 5) ND(0 5)1 ND(0 5) 55 21 <br />' 12/18/96 780 ND(0 5) ND(0 5) 54 ND(0 5) ND(0 5) ND(0 5) ND(0 5) ND(0 5) ND(0 5) ND(() <br /> 5) 16 ND(0 5) <br /> 7115197 820 ND(0 5) ND(0 5) ND(0 5) ND(D 5) ND(0 5) 25 ND(0 5) ND(0 5) 14 ND(0 5) 85 ND(0 5) <br /> 10/23/97 500 ND(0 5) ND(0 5) ND(0 5) ND(0 5) NS 1 6 ND(0 5) NS 066 ND(0 5) 32 ND(0 5) <br /> 1129198 950 NS NS NS NS NS ND(5 0) ND(5 0) NS ND(5 0) NS 17 ND(5 0) <br /> 5121198 620NSI NS NS ND(10)1 NS ND(10) ND(10) NS NS ND(10) 26 NS <br /> 10/28/98 170 ND(D 5) NS 1 1 ND(0 5) N5 ND(0 5) ND(0 5) NS 10 <br /> ND(0 5)1 11 ND(0 5) <br /> Results reported in micrograms per liter <br /> ND=Not detected at or above the laboratory detection limit shown in parentheses <br /> Not sampled <br /> r <br /> r <br /> • <br /> E\121382\1259971Histbenz XLS-11/10/98 Page 1 of 2 <br />