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a� �� n at�ta nor rtntttttttttr twtr ter YragplR� t� � t� � � � 1� � � SUMMARY OF GROUNDWATER El FVATiON AND ANALYTICAI DATA SHOP 10 3NAINTENANCF STATION STOCkTON CAIIFORNIA TOC Depth to C-ad Ground Water EIh)F Total Water TPII-G TFII D Benzene Toluene MTBE %4ell 1 D Date Elevation Ground-Worse Einallon Benzene Xylenes (in(nf) (in("o Elevation (In meters) (ORA) 1,811) (Pgtl) (rao) (PCS) (ppJ11 (140 (to feel) MW 25 1012311)96 2195 5990 3795 1 1 57 60 <50 so 50 1 0 6 1 <05 Mw 25 05122/1997 2195 A84 3289 1002 600 600 <0 3 <01 <0 G <06 <06 MR 25 091251997 21 95 57 28 3533 1077 <500 <500 <0 3 <0 3 <0 6 <0 6 <0 6 MW 25 12129/1997 21 95 5642 3447 1051 <50 <5000 <0 5 <0 5 <05 <1 <5 MW 25 031161t998 21 95 5284 3089 942 <50 <50 <0 5 <0 5 <05 <1 <5 M W 25 11611511998 21 95 49 0 2724 Rio <YX) <5(w)0 <0 3 '03 <06 <0 6 <5 MW 25 0812511998 2195 4978 2783 848 <500 <5000 <03 <03 <06 <06 <06 <101 Mw 25 1210211998 2195 4926 2731 S32 6W <400 IS 20 2 110 <I0(<10) MW 25 0410111999 2192 45 89 1 2397 7 31 <100 <100 <0 I I <0 2 <0 1 <0 I <0 6 MW 25 06!2811999 21 92 -4629--- 24 37 7 43 <100 <100 <03 <0 2 <0 2 <04 <0 6" Mw 25 09124/1999 21 92 4906 2714 8 27 <100 <100 <0 3 <0 2 <0 2 <04 1 <0 6' M W 25 01104120[X1 2192 4786 2594 791 <100 <100 <0 3 <0 2 <0 2 <04 <0 6, Mw 25 03/26/2000 21 92 4556 2364 721 <100 <100 <0 3 <0 2 <0 2 <04 <0 6' MW 25 W07Y20W 21 92 45 15 2323 708 <100 <100 <0 3 <0 2 <0 2 <0 4 <0 6 M W 25 0913 312000 21 92 4801 26 V9 7 95 1 <50 <50 1 0 3 102 1 <0 2 <0 4 <0 6 MW 26 1012,111996 2121 59 58 38 37 11 70 too <50 <0 5 <0 5 <05 <0 5 5 1 MR 26 05122!1997 2121 5457 3336 1017 <500 eSM ) <03 <06 <06 <06 MW 26 1012511'017 2121 5681 3560 to 85 <5(N) 600 <03 <03 <06 <06 <t16 MW 26 1212911997 21 21 5616 3495 14165 <50 <5(KHI <0 5 <0 5 <05 1 2 5 MW 26 03116/1998 21 21 52 61 3140 957 <50 92 <0 5 <0 5 <0 5 12 <5 MW 26 06/1511998 21 21 48 8} 2762 842 <500 <50W <0 3 <0 3 <0 6 <06 <5 MW 26 1 08/031199 jWdl Abandoned Notes TOC=Top M casing eles almn hf%l = Mean Sea I esel All Mundwater Intl measutorttrnrs ate presented m fret TPH G=Total Petroleum Hydrocarbons as Gasolme by EPA Method 9015h1 mpf1=milligrams per liter TPII D-Total Petroleum Hydrocarbons as Diesel by EPA Method 8015M pWl-tmcrograms per liter BTEK=R—cr r Toluene Ethylbrttzone and Total Xylenes by EPA Method 8020 1<S)-MTBE cartceniranon as calculated by EPA Method 8260 hITBi -hlethyl Ternary But)[Fiber by CPA Merltnd 8020 t Denotes MTIIE samples analysed by LPA Method 826DB •Denotes duplicate sample NR denmrs Not Reported KAB Denotes Kabis samples collected at various depths All data prior to 31U99 was pms oded by the previous consultant(PSI) <=Less than method detmoon bnut =Not riwAw rd sampled tested or prrscm A 3 a0er the lal+orators result Indicates that the compound%vas detected abet r the miliod detection limit but below the laheramry mponmg lomu t r t ss.rin i 11.161.8 ni 8