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								           												Table     										A of 5
<br />     										Groundwater Monitoring Data
<br />												1995 to Present
<br />    						ARCO Service Station No  548, 1612 Hammer Lane, Stockton, California
<br />       	Well    			Elevation  Static   Top     Elevation   Groundwater
<br />   	Sample      			of Top   Water    of  	of    	Flow  					Ethyl-    Total
<br />  	Number    	Date  	of Casmg  Level  Screen Groundwater   Direction    TPHG   Benzene  Toluene benzene Xylenes  MTBE 1      Observations
<br />     	MW-2 (60)   02/16/98     	982     2948		-1966   	SE  	<50       <0 5       <0 5      <0 5      <0 5	<5	No FP,No S,No 0
<br />     	MW-2 (60)   06/23/98   [P]      982     2698		-1716   	SE  	<50       <0 5       <05      <0 5      <0 5	<5	No FP,No S,No 0
<br />     	MW-2 (60)   09/29/98   [P]      982     2878		-1896    	E   	<50       <0 5       <0 5      <0 5      <0 5	<5	No FP,No S,No 0
<br />    	MW-2 (60)   12/30/98   [P]      982     2653		-1671   	SE  	<50       <0 5       <0 5      <0 5      <0 5	<5	No FP,No S,No 0
<br />    	MW-2 (60)   03/31/99   [P]      982     2511		-1529  	E-SE 	<50       <05      <0 5      <0 5      <0 5	<5	No FP,No S,No 0
<br />    	MW-3 (62)   02/15/95     	995     4069   4300      -3074    	E  	**84      <0 5       <0 5      <0 5      <0 5       NA      No FP,No S, O=NE
<br />    	MW-3 (62)   05/12/95     	995     3880		-2885    	E  	**100      <0 5      <0 5      <0 5      <05       NA       No FP,No S,No 0
<br />    	MW-3 (62)   08/29/95     	995     4027		-3032    	E 	*<170     <0 5      <0 5      <0 5      <0 5       NA       No FP,No S,No 0
<br />    	MW-3 (62)   12/04/95     	995     3906		-29 11    	E 	*<150     <0 5       <0 5      <0 5      <0 5       NA       No FP,No S,No 0
<br />    	MW-3 	02/02/96     	995     3710		-2715    	E 	*<100     <0 5       <0 5      <0 5      <0 5       NA       No FP,No S,No 0
<br />    	MW-3 (62)   05/10/96     	995     3453		-2458    	E 	**<100     <05       <0 5      <0 5      <05	<3	No FP,No S,No 0
<br />    	MW-3 (62)   08/29/96     	995     3621		-2626    	E  	**<90     <0 5       <0 5      <0 5      <0 5       *<4       No FP,No S,No O
<br />    	MW-3 (62)   11/20/96     	995     3531		-2536    	E 	**<90     <0 5       <0 5      <0 5      <0 5	<3	No FP,No S,No 0
<br />    	MW-3 (62)   03/19/97     	995     3154		-2159  	E-SE       **<80     <0 5       <0 5      <0 5      <0 5	<3	No FP,No S,No 0
<br />    	MW-3 	05/27/97     	995     3116		-2121  	E-SE       **<70     <05       <0 5      <05      <0 5	<3	No FP,No S,No 0
<br />    	MW-3 (62)   08/12/97     	995     33 14		-2319    	E   	<50       <0 5       <0 5      <0 5      <0 5	<5	No FP,No S,No 0
<br />    	MW-3  62    11/18/97     	9 95   			-�
<br />    		(  }    				32 95 		_3 00    	E   	<50	15       087      <0 5      068	<5	No FP,No S,No O
<br />    	MW-3 (63)   02/16/98     	995     2905		-1910   	SE  	140       050       071      <0 5      <0 5	<5	No FP,No S,No 0
<br />    	MW-3 (62)   06/23/98   [P]      995     2694		-1699   	SE  	<50       <0 5       <0 5      <0 5      <0 5	<5	No FP,No S,No 0
<br />    	MW-3 (62)   09/29/98   [P]      995     2872		-1877    	E   	<50       <05       <0 5      <0 5      <0 5	<5	No FP,No S,No 0
<br />    	MW-3 (62)   12/30/98   [P]      995     2656		-1661   	SE  	<50       <0 5       <0 5      <0 5      <0 5	<5	No FP,No S,No O
<br />    	MW-3 (62)   03/31/99   [P]      995     2509		-15 14  	E-SE 	<50       <0 5       <05      <0 5      <0 5	17	No FP,No S No 0
<br />    	MW-4 (63)   02/15/95    	1157    4212   4400      -3055    	E   	<50       <0 5       <0 5      <0 5      <0 5       NA      No FP,No S,O=NE
<br />    	MW4 (63)   05/12/95    	1157    4028		-2871    	E   	<50       <05       <0 5      <0 5      <0 5       NA       No FP,No S,No 0
<br />    	MW-4 (63)   08/29/95    	1157    4172		-3015    	E   	<50       <0 5       <0 5      <0 5      <0 5       NA       No FP,No S,No 0
<br />    	MW-4 (63)   12/04/95    	1157    4044		-2887    	E   	<50       <0 5       <0 5      <0 5      <0 5       NA       No FP,No S,No 0
<br />    	MW-4	02/02/96    	1157    3854		-2697    	E   	<50       <0 5       <05      <0 5      <0 5       NA       No FP,No S,No 0
<br />    	MW-4  63    05/10196    	1157    3602		-24 45    	E   	<50       <05       <05      <0 5      <0 5	<3	No FP,No S,No 0
<br />    	CPT 1ARC0105481QTRLr0548Q199 XL5      																	�G�GL6
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