Laserfiche WebLink
1 AX <br /> HISTORICAL.GROUNDWATER MONITORING DATA <br /> Former ARCO Service Station No 2168 <br /> 441 Charter Way <br /> Stockton,California <br /> Elevation <br /> Top of Static Water Water Depth to Ethyl- Total Dissolved <br /> Well ID Casing(feet Level Elevation Screen TPHG Benzene Toluene benzene Xylenes MTBE Oxygen <br /> &Sample Date rnsl) (feet bgs) (feet msl) (feet bgs) µg/L µg1L µg/L [ig/L µg/L n/L (ppm) Observations <br /> MW 8 8/30100 935 1885 -950 150 115 <2 <2 <2 <2 <2 NA No FP,No S,Yes 0 <br /> 11/21/00 1930 -995 <50 <0 5 <0 5 <0 5 <0 5 <2 NA No FP,No S,Yes 0 <br /> 2115/01 18 83 -948 <50 <05 <0 5 <0 5 <0 5 <2 12 No FP,No S,O=NE <br /> 5/17/01 1890 -955 <50 <0 5 <0 5 <0 5 <0 5 <2 26 No FP,No S,Yes O <br /> 8/16101 2012 -1077 <50 <0 5 <0 5 <0 5 <0 5 <2 09 No CP,No S,No 0 <br /> 12/6/01 1829 -894 <50 <0 50 <0 50 <0 50 <0 50 <0 50 16 No FP,No S,Yes O <br /> MW-8B 8/30/00 961 2027 -1066 750 1,130 425 496 106 108 <2 NA No FP,No S,Yes 0 <br /> 11/21/00 2088 -1127 924[4] 241 234 525 109 <2 NA No FP,No S,Yes 0 <br /> 2115101 2088 -1127 811 [7] 159 298 490 492 <2 13 No FP,No S,O=NE <br /> 5117101 2024 -1063 137[5] 504 l 32 947 43 <2 25 No FP,No S,Yes O <br /> 8116101 2164 -1203 63 12 079 76 42 <2 18 No FP,No S,Yes 0 <br /> 12/6101 2258 -1297 94[8] 40 <0 50 5 5 17 <0 50 1 1 No FP,No S,Yes 0 <br /> MW-8C 8/30100 901 2121 -1220 1050 685 156 678 2 18 758 <2 NA No FP,No S,Yes 0 <br /> 11/21/00 1919 -1018 <50 0 692 <0 5 <0 5 <0 5 <2 NA No FP,No S,Yes 0 <br /> 2115101 2055 -1154 <50 184 173 <50 194 <2 20 No FP,No S,O=NE <br /> 05/17/01 1995 -1094 <50 0 861 <0 5 <0 5 <0 5 <2 20 No FP,No S,Yes O <br /> 8116101 2141 -1240 <50 071 <05 <05 <05 <2 44 No FP,No S,No0 <br /> 1216101 2228 -1327 150 47 1 2 12 4S <0 50 l 3 No FP,No S,Yes O <br /> NA=Nol analyzed NS=Not sanrpled NE=Noi evaluated 0=Odor S=Sheen FP=Free product nisl=mean sea level bgs—below ground surface <br /> µg/L=Analytical results in nucrogrants per liter <br /> Sample desi ations [4]Cluoivatograni Pattern Gasoline C6 C 12 <br /> M W 4 34 Well ID and sample depth(feet) [5]Chromatogram Pattern Weathered Gasoline C6-C12 <br /> W 24 M W3R Water sample,sample depth(feet),R=Rmsate blank [6]Chromatogram Pattern Weathered Gasoline C6 C12+Unidentified Hydrocarbons C6 C12 <br /> TPIiG=Total petroleum hydrocarbons as gasoline [7]Ciuoniatograni Pattern UnrdenuGed Hydrocarbons C6 C 12 <br /> Below deteeti..limit for analytical methods used (9]Hydrocarbon pattern is present in the requested fuel quantitation range but does not resemble the pattern of the requested <br /> •=Raised method reporting hmtt due to high analyte concentration requiring sample dilution fuel <br /> '•=Raised method reporting lontt due to matrix interference <br /> MTBE was ana[yzcd usuig USEPA Method 8260 unless noted otherwise(see below) <br /> 11]=MTBE was analyzed using USEPA Method 8020 <br /> [2]=Water levels collected on 1115/99 samples collected on 12/17/99 due ro equipment failure <br /> 131=W-ter level collected on 2125100 1 <br /> Arco- 8 of 8 2168_Quarteily_Data xis Delia <br />