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w9b ® M T 4 r Historical TVH-G Concentrations in Groundwater Ralnbo/Earth Grams Facility Stockton,Califomid i Moni ring Well ID/Concentration WWI) Parameter 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 TVH-G 7110187 78,000 ND 50 ND 50 4126188 1,200 ND 50 3119190 17,300 ND 50 ND 50 ND 50 ND 50 ND 50 3,300 12120/90 9,500 ND 5 01 ND 50 ND 50 ND 50 419192 65,900 200 ND 50 ND 50 ND 50 8119192 96,000 ND 50 12/23/92 88,000 ND(50) 417193 196,000 ND 50 ND 50 7130193 53,000 ND 50 ND 50 ND 50 10/21/93 41,000 ND 50 ND 50 12/29/93 67,000 N D 50 ND(50) 3123194 69,000 1,600 ND 50 14,000 Nb 50 ND 50 ND 50 3,800 ND 50 ND 50 6,500 617/94 34,000 530 ND 50 7,900 ND 50 ND 50 ND 50 1,400 ND 50 ND 50 7,100 918194 28,000 1,200 ND 5D 6,600 ND 50 ND 50 ND 50 2,400 ND 50 ND 50 6,800 2112196 26,000 ND 50 ND 50 3,700 ND(50) ND 50 ND 50 ND 50 310 2,600 5114196 27,000 ND 50 ND 50 3,800 ND 50 53 210 ND(50) 600 5,000 9118/96 24,000 ND 50 65 ND 50 300 2,100 12/181961 23,000 ND 50 ND 50 6500 ND 50 ND 50 ND 50 ND(50) ND'501 Np 50 ND 50 900 69 200000 - -- - ----- - - _ - - ------- rF- -----r- ---� 14000 190 Dao - L a 12000 -j-Mw-1 160000 --- ---- - - - - --- -- _ - - -- --- - - --iMw-2 140000 �- _-- - ---_- _ _ -_ _ - - -- - - -- - - s 10000 -N Mw-3 - - -- - - --- - - C1 120,000 -- _ __-- - - - ---- --- -Tj 9000 O BMW 4 -*-Mw 5 z 100 000 - r Mw-6 0 80000 '_� _ -- - _ - - ��- _ --- - - �a---f -� 6000 3 -BMW 7 60000 z 7_7 _ _ _ -_- -_ - -- - __- _- _ _ _ --_- -- _ - aaoo u¢, -♦-Mw-9 `- • r7 BMW-9 40000 F - -- -- - -- -w__ - - --- - - - - -�Mw-10 2000 20000 IK-I X Mw11 VY o - - - 0 -*--Mw-12 _ _ 7/10167 3/19/90 419192 12/23/92 7130193 12129/93 6!7/94 2 i?J96 9116196 --*-MW-13 DATE ND Not detected at or above laboratory detection limit shown In parentheses TVH-G Total volatile hydrocarbons as gasoline ug/I Micrograms per liter r \191'4R9419xi9971HISTTVHG XLS XLS-2/21/97 Page 1 of 1 i _ I