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I Nomellini Property December 2013 <br /> 1045 West Charter Way, Stockton <br /> Claim No: 552 <br /> Most Recent Concentrations of Petroleum Constituents in Groundwater <br /> Sample Sample TPHg TPHd Benzene Toluene Ethyl- Xylenes MTBE TBA <br /> Date (pg/L) pg/L) (pg/L) (pg/L) Benzene (pg/L) (pg/L) (pg/L) <br /> (N /L <br /> MW- 1 09/28/12 11600 <50 <0.5 <0. 5 <0 . 5 <0 . 5 7.9 < 10 <br /> MW-2 03/06/13 1 ,900 <50 53 3. 8 6.4 9. 8 10 < 10 <br /> MW-3 09/28/12 11400 NA <0.5 <0.5 <0. 5 '4. 1 < 1 < 10 <br /> MW-4 03/06/13 39400 21100 720 5. 7 3. 9 14. 1 6.7 < 10 <br /> MW-5 03/06/13 <50 <50 <0.5 <0. 5 <0 .5 <0 .6 < 1 < 10 <br /> MW-6 03/06/13 <60 <50 <0. 5 <0. 5 <0 . 5 <0.6 < 1 < 10 <br /> MW-7 05/14/121 15900 <50 36 <0. 5 1 . 8 8 . 3 < 1 --< 10 <br /> MW-8 05/24/10 <50 <50 <0. 5 <0.5 <0. 5 <0.6 < 1 < 10 <br /> MW-9 05/24/11 <50 <50 <0.5 <0. 5 <0 . 5 <0 . 6 < 1 < 10 <br /> MW-10 09/28/12 160 NA 203 <0.5 <0 . 5 <0 .5 16 _ < 10 <br /> MW-11 05/24/11 <50 <50 <0.5 <0.5 <0 . 5 <0 . 6 14 < 16- <br /> MW-12 09/28/12 190 NA 2.3 2.4 <0 . 5 3 . 2 34 < 10 <br /> MW-13 05/24/11 <50 <50 <0.5 <0. 5 <0 . 5 <0.6 < 1 < 10 <br /> MW-14 05/24/11 <50 <50 <0.5 <0 . 5 <0. 5 <0. 6 < 1 46- <br /> MW-15 03/06/13 <50 <50 <0.5 <0. 5 <0. 5 <0.6 < 1 < 10 <br /> EWA 03/06/13 31200 <50 29 <0 . 5 4.2 29 3.6 < 10 <br /> VW-1 09/28/12 81600 <50 7.7 62 8.6 395 < 1 < 16- <br /> VW-2 06/11 /09 <50 <50 <0.5 <0. 5 <0 . 5 <0 . 6 < 1 < 10 <br /> VW-3 09/13/06 <50 <50 <0.5 <0. 5 <0 . 5 <0. 6 < 1 < 10 <br /> VW-4 09/13/06 <50 <50 <0.5 <0. 5 <0. 5 <0.6 < 1 < 16-- <br /> VW-5 09/13/06 <50 <50 <0. 5 <0 . 5 <0. 5 <0 .6 < 1 < 10 <br /> VW-6 09/13/06 <50 <50 <0.5 <0. 5 <0. 5 <0.6 < 1 < 10 <br /> VW-7 09/13/06 <50 <50 <0. 5 <0 . 5 <0 . 5 <0.6 < 1 <10 <br /> VW-8 09/13/06 <50 <50 <0.5 <0 . 5 <0. 5 <0.6 < 1 <10 <br /> VW-9 09/13/06 <50 <50 <0.5 <0. 5 <0. 5 <0 .6 < 1 < 10 <br /> AW-1 09/28/12 225000 <50 340 380 460 11820 < 1 < 10 <br /> AW-2 09/28/12 24,000 <50 2,300 58 400 1920 27 < 10 <br /> AW-3 09/28/08 1 ,000 <50 38 <0. 5 <0 , 5 <0 . 6 <1 < 10 <br /> AW-4 09/28/08 <50 <50 <0.5 <0. 5 <0. 5 <0 . 6 < 1 < 10 <br /> AW-5 09/28/08 2,400 <50 170 <0. 5 <0 . 5 4. 1 <1 < 10 <br /> WQOs W 1 51 56 1 0. 15 42 29 17 5a 1 , 200 <br /> NA: Not Analyzed, Not Applicable or Data Not Available <br /> pg/L: Micrograms per liter, parts per billion <br /> <: Not detected at or above stated reporting limit <br /> TPHg: Total petroleum hydrocarbons as gasoline <br /> TPHd : Total petroleum hydrocarbons as diesel <br /> MTBE: Methyl tert-butyl ether <br /> TBA: Tert-butyl alcohol <br /> WQOs: Water Quality Objectives, Regional Water Board Basin Plan <br /> a: Secondary maximum contaminant level (MCL) T " <br /> °: California Department of Public Health , Response Level <br /> Groundwater Trends <br /> • Since 1991 , fifteen groundwater monitoring wells have been installed and regularly monitored. <br /> Benzene trends are show below: Source Area (AW-2) and Downgradient (MW- 1 ) . <br /> Page 9 of 14 <br />