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<br /> Table 5
<br /> Historical TPH-r'-),oncentrations in Groundwater
<br /> 4 f
<br /> The�arthgrains Company
<br /> Stockton,California
<br /> Moni ring Well ID/Concentration fuq/1)
<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 /> 7/10187 78,000 ND 50 ND 50
<br /> 4/26188 1,200 ND 50
<br /> 3/19190 17,300 ND 50 ND 50 ND 5Q ND 50 ND 50 3,300
<br /> 12/20/90 9,500 ND 50 ND 50 ND 50 ND 50
<br /> 4/9/92 65,900 200 ND 50 ND 50 ND 50
<br /> 8119192 96,000 ND 50
<br /> 12/23/92 88,000 ND 50
<br /> 417/93 196,000 ND 50 ND 50
<br /> 7/30193 53,000 ND 50 ND 50 ND(50)
<br /> 10/21/93 41,000 1 ND 50 ND 50
<br /> 12/29/93 67,000 ND 50 ND 50
<br /> 3/23194 69,000 1,600 ND 50 14,000 Nb 50 ND 50 ND 50 3,600 ND 50 ND 50 6,500
<br /> 6/7/94 34,000 530 ND 50 7,900 ND 5p ND 50 ND 50 1,400 ND 50 ND 50 7,100
<br /> 918/94 28,000 1,200 ND 5D 6,600 ND 50 ND 50 ND 54 2,400 ND 50 ND 50 6,800
<br /> 2112196 26,000 ND 50MND
<br /> 3,700 ND 50 ND 50 ND 50 ND 50 310 2,600
<br /> 5/14/96 27,000 ND 50 3,800 ND 50 53 210 ND 50 600 5,000
<br /> 9/18/96 24,000 ND 50 ND 50 ND 50 ND 50 65 ND 50 300 2,100
<br /> 12/18/96 23,000 ND 50 6500 ND 50 ND 50 ND 50 ND 50 ND 50 ND 50 ND 50 900 69
<br /> 7/15/97 22,000 ND 50 ND 50 ND 50 ND 50 200 ND 50 ND 50 240 ND 50 2000 ND 50
<br /> 200 000 _ 14000
<br /> 180,Oo0
<br /> 160 000 ."� �_ ,..., , e 12000 MW 1
<br /> J 140x00 :7 .. Y rP t a ✓ w ,-�a _ r� e ti
<br /> 10000 y MW 2
<br /> 120 000 - w `x U -MW 3
<br /> U .+ _ _ _ _ „ v 6000 p 0 MW 4
<br /> 2 100 000 " f U
<br /> ,•� _' .,,,,, ., r a _ AMW 5
<br /> 80 000 6000 W _ _Mw 6
<br /> s_ 3
<br /> 60 000 -MW 7
<br /> - - • - LL 4000 ��++ }MW 8
<br /> x
<br /> 40 000 z ut - Y _ O _o-MW 4
<br /> 20 000 -_ _ _ 2000 - MW 10
<br /> 0 0 BMW 11
<br /> I '
<br /> 7/10187 3119190 419192 12123/92 7130/93 12/29/93 617194 2112196 9/18196 7115197 - MW 12
<br /> DATE
<br /> BMW 13
<br /> ND Not detected at or above laboratory detection limit shown in parentheses
<br /> TPH-G Total petroleum hydrocarbons as gasoline
<br /> ug/I Micrograms per liter
<br /> E 1121382112599713gtr971HISTTVHG XL5 XLS- 10/1/97 Page 1 of 1
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