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TABLE 2 CUMULATIVE ANALYTICAL RESULTS-GROUNDWATER San Joaquin County Motor Pool, 1810 East Hazelton Avenue,Stockton,California OXYGENATES SAMPLE DATE ETHYL- LOCATION SAMPLED TPH-D TPH-G BENZENE TOLUENE BENZENE XYLENES MTBE DIPE ETBE TAME TBA 1,2-DCA EDB MW-6 12/19/03 NA 7,800 2,100 610050 ND<5p 820 NDc5 ND<5 ND-5 ND<5 ND<50 NO<5 NA 03124/04 NA 9,300 1,600 ND<20 NDQO 540 ND<0.5 ND<0.5 NO<0.5 ND10.5 ND<5 ND<0.5 NA 06/09/04 N, 5,600 630 ND-20 ND-20 81 ND<0.5 ND<0.5 ND<0.5 ND<0.5 NO<5 IN NA 08/23/04 NA 3 400 180 ND<10 ND110 29 NDcS ND<5 NO<5 NO<5 1,10<50 ND<5 NA 12/29104 NA 3,800 40 NO-10 NDc10 ND<20 ND<OS ND<05 ND<0.5 ND<0.5 NO<5 NO<0.5 NA 03/23/05 NA 1,400 15 ND<0.5 1.1 6 ND<05 ND<OS ND<p5 ND<O.5 NO<5 ND<0.5 NA 06/29/05 NA 760 18.1 ND<0.5 1 1.2 3.7 11 ND<05 ND10.5 ND<pS NDcp.S ND<5 vA NA 09/21/05 NA 602 10.8 ND<0.5 ND<0.5 3.3 NO<0.5 ND<0.5 NO<0.5 NDc0.5 ND<5 NA NA 1220/05 NA 440' 18.7 1413<0.5 0.7 4.7 ND<05 ND<0.5 ND<0.5 ND<0.5 37.4 ND<0.5 ND<0.5 03115/06 NA 386 10.6 ND<0.5 ND<0.5 4.4 ND<05 Nei Nei ND Dfs ND15 ND<OS 0.6 06/21/06 NA 233 12.6 0.8 0.7 ND<t 140<0.5 110<0.5 ND<0.5 NDNS ND<5 NO<0.5 ND<0.5 09/20/06 NA 269 NO<0.5 ND<05 0.9 ND<t NO<OS ND<0.5 ND<0.5 14D<0.5 26.7 ND<0.5 ND<05 12/12/06 NA 229 0.8 0.80.8 NO<t ND<0.5 Nei ND<0.5 NO<p5 ND<5 ND<0.5 NA 03/20/07 NA 177 ND<0.5 0.6 ND<0.5 NDai ND<0.5 140<0.5 ND<0.5 Ni ND<5 ND<0.5 1413<0.5 06/11/07 NA 147 5.2 ND<OS NO<0.5 NO<1 NO<O5 ND<05 ND<OS 140<0.5 31.1 ND<0.5 NA 0925/07 NA 148` ND<0.5 NO4.5 NDNs ND0 No 05 ND<0.5 NO<0.5 Nei ND<5 ND<0.5 ND<Os 12/04/07 NA 128" ND<D.5 ND<0.6 ND<05 ND<l ND<0.5 NOa0.5 ND,0.5 ND<0.5 ND<5 ND<0.5 ND<05 03/31/08 NA 106 3.6 ND<0.5 14D<0.5 Nei ND<05 NO<0.5 ND-0.5 ND<05 ND<5 NO<0.5 ND<05 06109/05 NA 88.6 3.2 ND<05 ND<0.5 ND-1 ND<0.5 ND<0.5 NO<0.5 ND<0.5 ND<5 ND<0.5 N04 09/05/08 NA 169 ND<0.5 ND-0 ND10.5 NO<t ND<0.5 ND<0.5 ND<05 ND<0.5 ND<5 ND<0.5 ND<0.5 11/20/08 NA 71.5 1.9 NDc0.5NDc0.5 NO<t ND<0.5 ND<O5 ND<0.5 ND<0.5 NDc5 ND<OS ND<p.5 MW.7 03/23/05 NA ND<50 ND<0.5 ND<OS ND<05 NE 0.7 I ND<0.5I ND<0.5 ND<OS ND<5 NO<05 NA 08/29/05 NA ND<50 ND<p.5 ND<0.5 NO<0.5 NO0 ND<0.5 ND<0.5 ND<0.5 ND<0.5 ND<5 NA NA 09/21/05 NA 141 5 ND<0.5 ND<0.5 ND<p.5 ND 12/20105 NA ND<50 ND<0.5 ND<D.5 NDc0.5 NDq NON,561000.5 ND<0.5 ND<5 61000.5 ND<0.5 0315/06 NA NO<50 ND<0.5 NO<0.5 ND<05 NDet ND<0.5 NDep.5 ND<0.5 ND<O.S ND<5 NDc0.5 ND<p.5 06/21/06 NA 1413 0 1,10<05 ND<0.5 NO<0.5 NDq NO<0.5 ND<0.5 ND<0.5 ND<O5 NDc5 NO<0.5 ND<p.5 09/20/06 NA ND-60 NDi5 ND<D.5ND<0.5 ND<t ND<0.5 ND<0.5 ND<0.5 NO<0.5 ND<5 ND<05 NOA.S 1212/06 NA ND-50 ND<0.5 ND<0.5 ND<0.5 ND<t ND<0.5 ND<0.5 ND@5 ND<0.5 NO<5 ND<0.5 NA 03/20/07 NA NDe50 ND<05 NO<0.5 NDc0.5 ND<1 NO<0.5 ND<0.5 ND<0.5 NO<0.5 NO<5 ND<0.5 NDN.S 06111/07 NA ND<50 ND<0.5 ND<0.5 ND<0.5 ND<l Np<0.5 NDc0.5 ND<0.5 Np<p.5 NDb NO<0.5 NA 09/25/07 NA NO<50 ND<0.5 ND<0.5 ND<05 NO0 ND<0.5 ND<0.5 ND<0.5 NDN5 ND-5 ND<p.5 NO<0.5 12104/07 NA ND<50 ND<0.5 ND<0.5 ND<0.5 ND<t ND<0.5 NO<0$ NOc0.5 ND<0.5 ND<5 ND<05 NDAS 03/31/08 NA NN50 ND<0.5 ND<p.5 N1<0.5 NDO ND<0.5 ND<0.5 ND<0.5 ND<0.5 ND<5 19 <0.5 ND<0.5 06/09/08 NA ND-50 ND<0.5 NO<0.5 NO<0.5 NDc1 ND<0.5 ND<0.5 ND<0.5 ND<0.5 NDcS ND<0.5 NO<0.5 D9105108 NA ND-5D ND<0.5 ND<05 NO<05 ND 11/20/08 NA ND<50 ND<O5 ND<05 61000.5 NDc1 NO<05 ND<p.5 ND<OS ND<0.5 NO<5 NO<0.5 ND<0.5 12/28/01 NA ND<50 ND<05 NDc0.5 ND<D.5 NDc0.5 ND<0.5 ND<0.5 NO<0.5 NDc0.5 ND6 ND<p.5 NA NOTES'. All maues are reported In miaegrams per liter(ug/I)which translates to parts per bsllon apb) Total Petroleum Hydrocarbons as Diesel(TPH-D)analyzed by EPA Meted 8015M Tafel Petroleum Hydrocarbons as Gasoline(TPH-G),benzene,toluere,ethylberizene,xylenes by EPA Method 62608 or W21 SM015M Oxygenates'.Methyl-t-but ether(MTBE),OI-isopropyl ether(DIPE),Etl,144butyl star(ETRE),Tert-emyt methyl star(TAME)and Tert-Butanol(TOA)by EPA 82608 1 2-Dlcbloroe t ens(1.2-OCA)and t 2-dibranoelhene(EDD)analyzed by EPA Method 82WB ND<0.5=Not Detected at reporting limit of 0 5 ppb NA=Not analyzed for specified compound Sample Womato Mph does not resemble rued standard used for qua tabor,result is"bM3ted Result Is elevated due tote presence of single analyte peaks)in"quantitation range 3of3