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								       													Ta�											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 Casing  Level  Screen Groundwater   Direction     TPHG    Benzene  Toluene benzene Xylenes  MTBE[11     Observations
<br />      	MW-1
<br />      	MW-1(56)      02/15/95 	1036    4119   4851      -3083    	E    	59 	21	25	10       33	NA     No FP,No S, O=NE
<br />      	MW-1(56)      05/12/95 	1036    3933		-2897    	E    	84 	47	41	17	65	NA     No FP,No S,Yes 0
<br />      	MW-1(56)      08/29/95 	1036    4089		-3053    	E    	190 	80	58	47	18	NA     No FP,No S, Yes 0
<br />      	MW-1(56)      12/04/95 	1036    3953		-2917    	E    	78 	23	14	14       53	NA     No FP,No S, Yes 0
<br />      	MW-1  	02/02/96 	1036    3757		-2721    	E    	59 	34	15	15	49	NA      No FP,No S,No 0
<br />      	MW-1(56)      05/10/96 	1036    3504		-2468    	E    	92 	55	21	24	12 	<3       No FP,No S,No 0
<br />      	MW-1(56)      08/29/96 	1036    3677		-2641    	E    	100 	42	14	32	12 	<3       No FP,No S,No 0
<br />      	MW-1(56)      11/20/96 	1036    3575		-2539    	E    	140 	60	is	46	18 	<3       No FP,No S,No 0
<br />      	MW-1(56)      03/19/97 	1036    3202		-2166  	E-SE  	230 	11 	22	64	20 	<3       No FP,No S,No 0
<br />      	MW-1(56)      05/27/97 	1036    3227		-2191  	E-SE  	300 	18	16	10	25 	<3       No FP,No S,No 0
<br />      	MW-1(55)      08/12/97 	1036    3364		-2328    	E    	110  	7	075       48       96 	<5       No FP,No S,No 0
<br />      	MW-1(56)      11/18/97 	1036    3338		-2302    	E    	180 	15 	13	10	14 	<5       No FP,No S,No 0
<br />      	MW-1(57)      02/16/98 	1036    3003		-1967   	SE   	<50 	19	28       074       27 	<5      No FP,No S,Yes 0
<br />     	MW-1(56)      06/23/98[P]     1036    2748		-1712   	SE   	103	458      0 581      3 17      146	<5       No FP,No S,No 0
<br />     	MW-1(55)      09/29/98[P]     1036    2925		-1889    	E    	151	124       <0 5      807      238	<5      No FP,No S,Yes O
<br />     	MW-2
<br />     	MW-2(61)      02/15/95  	982     4067   4700      -3085    	E    	<50	<05       <0 5      050      <0 5       NA     No FP,No S, O=NE
<br />     	MW-2(61)      05/12/95  	982     3885		-2903    	E    	<50	<0 5       <05      <0 5      <0 5       NA      No FP,No S,No 0
<br />     	MW-2(61)      08/29/95  	982     4044		-3062    	E   	*<52       <0 5       <0 5       10       <0 5       NA      No FP,No S,No 0
<br />     	MW-2(61)      12/04/95  	982     3908		-2926    	E   	*<60       <05       <0 5      <0 5      <0 5       NA      No FP,No S,No 0
<br />     	MW-2  	02/02/96  	982     3709		-2727    	E    	<50	<0 5       <05      <0 5      <0 5       NA      No FP,No S,No 0
<br />     	MW-2(61)      05/10/96  	982     3455		-2473    	E    	<50	<0 5       <0 5      <0 5      <0 5	<3       No FP,No S,No 0
<br />     	MW-2(61)      08/29/96 	982     3629		-2647    	E  	*•<60       <05       <0 5      <0 5      <0 5	<3       No FP,No S,No 0
<br />     	MW-2(61)      11/20/96 	982     3525		-2543    	E    	<50 	05       <0 5      <0 5      <05	<3       No FP,No S,No 0
<br />     	MW-2(61)      03/19/97 	982     3152		-2170  	E-SE  	<50 	06       <0 5      <0 5      <0 5	<3       No FP,No S,No 0
<br />     	MW-2  	05/27/97  	982     3179		-2197  	E-SE  	<50 	12       <0 5      <0 5      <0 5	<3       No FP,No S,No 0
<br />     	MW-2(60)      08/12/97  	982     33 18		-2336    	E    	52 	<0 5       <0 5      <05      <0 5	<5       No FP,No S,No 0
<br />     	MW-2 61       11/18/97  	982     3288		-2306    	E    	<50 	26	14       065       15 	<5       No FP,No S,No 0
<br />     	CKC 1LSG13RDQTRARC010548Q398 XLS      																	�j      �
<br />    	Sheetl 																						T
<br /> 																									11/25/98
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