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i <br /> Chevron #9-4054 May 2014 <br /> 2103 Country Club Boulevard , Stockton <br /> Claim No : 12729 <br /> Most Recent Concentrations of Petroleum Constituents in Soil <br /> Constituent Maximum 0-5 feet bgs Maximum 540 feet bgs <br /> m lk date sam le-de th [mg/kg( date sam le-de th <br /> Benzene 2. 8 09/17/92 SBA-51 2. 1 09/22/92 SB-8-10' <br /> Eth (benzene 6. 3 09/17/92 SB4-5' 17 09/22/92 SB-8-10' <br /> Naphthalene NA NA <br /> PAHs NA NA <br /> NA: Not Analyzed, Not Applicable or Data Not Available <br /> mg/kg: Milligrams per kilogram, parts per million <br /> <: Not detected at or above stated reporting limit <br /> PAHs: Polycyclic aromatic hydrocarbons <br /> Most Recent Concentrations of Petroleum Constituents in Groundwater <br /> Sample Sample TPHg Benzene Toluene Ethyl- Xylenes MTBE <br /> Date (jig/l.) (pglL) (pg/L) Benzene (pg/L) (pg/L) <br /> IL <br /> MW-1A 09/25/13 81400 19200 87 67 75 7 <br /> MW-1B 09/25/13 31800 11100 11 2 14 2 <br /> MW-1C 09/25/13 290 54 0.8 2 10 <0.5 <br /> MW-2 09/25/13 41200 390 19 93 100 4 <br /> MW-2B 09/25/13 79000 2,500 32 4 18 2 <br /> MW-2C 09/25/13 11600 480 7 1 7 <0.5 <br /> MW-3 09/25/13 31900 24 5 25 9 0.6 <br /> MW4 09/25/13 11 ,000 250 51 590 140 <0.5 <br /> MW-4B 09/25/13 10,000 1 ,900 40 6 26 <1 <br /> MW4C 09/25/13 100 23 <0.5 <0. 5 <0.5 <0.5 <br /> MW-4D 09/25/13 280 83 <0.5 <0.5 <0.5 <0.5 <br /> MW-5 09/25/13 <50 <065 <0. 5 <0.5 <0. 5 <0 .5 <br /> MW-6 09/25/13 11900 180 6 2 4 8 <br /> MW-7 09/25/13 100 0.9 <0.5 <0. 5 <0.5 3 <br /> MW-8 09/25/13 580 0.7 <0.5 1 <0.5 <0.5 <br /> MW-9 09/25/13 <50 <006 <0.5 <0.5 <0. 5 0. 8 <br /> MW-9B 09/25/13 51500 19500 15 2 14 <1 <br /> MW-9C 09/25/13 <50 6 <0.5 <0.5 <0.5 <0.5 <br /> -MVV-91]i- - - 09125143= <50 <br /> MW-10 09/25/13 <50 <0.5 <0.5 <0. 5 <0.5 <0.5 <br /> MW-11 09/25/13 <50 <0.5 <0.5 <0.5 <0.5 <0. 5 <br /> MW-12 09/25/13 <50 <0.5 <0.5 <0.5 <0.5 <0. 5 <br /> MW-12B 09/25/13 830 200 2 <0.5 0.6 <0.5 <br /> MW-12C 09/25/13 <50 1 121 <0. 5 <0. 5 <0.5 <0. 5 <br /> MW-12D 09/25/13 <50 <0.5 <0.5 <0.5 <0. 5 <0.5 <br /> MW-13B 09/25/13 <50 1 <0.5 <0:5 <0.5 <0.5 <br /> MW-14B 09/25/13 <60 <0.5 <0.5 <0.5 <0.5 <0.5 <br /> WQO 5 0.15 42 29 17 5 <br /> pg/L. Micrograms per liter, parts per billion <br /> c Not detected at or above stated reporting limit <br /> TPHg: Total petroleum hydrocarbons as gasoline <br /> MTBE: Methyl tert-butyl ether <br /> WQOs: Water Quality Objectives, Regional Water Board Basin Plan <br /> Page 8 of 15 <br />