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EXHIBIT A <br /> SUMMARY OF HISTORICAL CONTAMINANT TRENDS AT JOE'S TRAVEL PLAZA <br /> -------- <br /> MTBE <br /> --------------- <br /> --- —...... <br /> Remarks <br /> Well Zone <br /> Max Conc Date Last Conc Date 1% Decrease <br /> ---------- -------- ---------- ------- <br /> ----------- .... ....--------- -------- ------------ ------- ---------- <br /> 4.0 9 10/08 99�86% --- <br /> ----------- --------- <br /> 4/28 00 <br /> -------------------------------------------- ----------- ---------------1----------111---------- ....... <br /> W- A 1,800.0 2 2/00 45.0 9/1008 97.50% <br /> 2 ------------------------------ ------ -----------------------------.--------- <br /> 9/10/08 98.96% <br /> ....... J6 6 -�i64 <br /> ------------—------------- ------- 7:3------ ----------------------- -------- - <br /> MW 4 <br /> MW-4 A 6.5 2/27/02 ND 9/10/08 1 100-00% <br /> IUD ACL ----------- ....... <br /> MW-5 A <br /> x ND for all parameters every <br /> ------------------------- <br /> sampling eventwell should.be <br /> dropped from sampling,program. <br /> . <br /> ------------- <br /> ND ALL EVENTS ND ALL 29X <br /> -6 A ND for all parameters every <br /> sampling event,except for one <br /> anomalous DRO his on 6/29/04, <br /> well should be dropped from <br /> samplingprogram. <br /> --------—. ------ ----........... ------------------ <br /> ------------ -------—.... ------------- ------- ---------- ----------- <br /> MW-7 A 110.0 1 9/28/05 � 35,0 9/10/08 68.18% ---------------- --------------------------------------- <br /> ------ ............... ------- ------------ ---6§�6 ------- <br /> -------------------------....-----; -- <br /> 180.0 4/28/05 i 74.0 9/10/08 i 58. �o ----------------------------*---------------------------------------------- <br /> ------------- ------------- <br /> -------------- - ------......—" . <br /> MW-9 A 350�O 9/28/05 31.0 9/10/08 1, 4% ...... ------ <br /> ----------- --- --------- -------- ------- ---------- <br /> MW <br /> ---1 <br /> 6l 8/05 ND ------- ...—-------- ------ ------ ------------------------ <br /> LASf 6 100.00% <br /> ------------ .......... ------------- ...... 3-----. <br /> -------------------------------- ------------ <br /> A 36.0 f" j 4� 9/9/08 88.06%-------- ............... ------------ <br /> ------------ ------ ------- <br /> --9/28/05.....---------.. . ---------—-------- <br /> kW-12C C <1 ALL EVENTS ND. LAST 7X ........ --------------------------------.- <br /> --- .... ----—.... <br /> .............--1-1-------.----------- ------------l-I------- ----------------------...... <br /> -13A/B A 130.0 9/25/08 i 130.0 9/9/08 1 Increase Well sampled 4x, MTBE concentrations <br /> have increased from 57.7, 66, 1110 to <br /> -- 130 ug/L. <br /> ---------------I------ ------------- ...........---------------------------------- ------ ...... ------------------------------- <br /> -----AW-1-3-C---- 1 ......11-1 C..... ----------2.9, 4/07 ND LAST IX 100-00% -------- ---------...................ND ALL EVENTS --------- <br /> A <br /> ------------- <br /> ------------NaN&........ 7X Well sampled 7x, MTBE concentrations <br /> -------------- ------------ ------------ <br /> have ranged from 0 to 85 ug/L. <br /> -------------- --- ------....... ------------------------ ------ <br /> ----------------- ------------------------- ND for all parameters every <br /> �6 LAST 7X <br /> B ND ALL EVENTS <br /> sampling event,well should be <br /> dropped from samplijn <br /> _g program. <br /> ------------- <br /> MW 1SA A 71.8 3/13/07 2.3 08 96.80% <br /> ------------------------------------------------------------------------------------- <br /> ------------- -----------------11—--------------- ------ <br /> W-15B B ND ALL EVENTS ND LAST 7X ND for all parameters every sampling <br /> event, except for one anomalous DRO <br /> hit on 3/13/08, well should be dropped <br /> if 2 more sampling events show ND for <br /> all parameters. <br /> ----------------- ....... ------------ <br /> ---------- <br /> Nb Last 15x 100.00% ND for all parameters every <br /> sampling event, except for one <br /> anomalous MTBE hit on 3/4/04, <br /> well should be dropped from <br /> sampling program, <br /> ----------- <br /> ------ ----------------------- -------------- ------- -------------------------------------------—------ ----------------- <br /> MWO-2 A 91.0 12/9/05 5.5 9/10/08 93.96-%--1 -----------------------—---------- ------ ------------- <br /> -------- 9/10/08 90 <br /> -------------------------------------------------------------- <br /> 11/30/06 ------------------------ ------- <br /> -------—--- :-------- --------- — -........1----.--'- :-- 3- ---------------------------- <br /> 80.0 5121/03 8 3:30% <br /> WO-IX <br />