FIELD DOCUMENTS - Laserfiche WebLink

Home Browse Search

Table 4 Groundwater Analytical Data - Total Petroleum Hydrocarbons and BTEX South Shore Parcels - Parcel 2A and Adjacent Areas West Weber Avenue and North Lincoln Street Stockton, California Depth Ethyl- Sample (feet, Date TPHg TPHd TPHk TPHo Benzene Toluene benzene Xylenes ID bgs) Sampled (mg/l) (mg/l) (mg/l) (mg/l) (mg/l) (mg/l) (mg/l) (mg/l) QA/QC Sampling (cont.) QCDUP-1 (MW-45) --- 10/18/11 <0.05 <0.05 ---<0.05 <0.0005 <0.0005 <0.0005 <0.0005 QCDUP-2 (MW-44) --- 10/18/11 <0.05 0.27 41 ---0.19 36 <0.0005 <0.0005 <0.0005 <0.0005 QCDUP-3 (MW-23) --- 10/18/11 0.072 0.43 ---0.13 36 <0.0005 0.00052 <0.0005 <0.0005 QCDUP-4 (MW-27) --- 10/19/11 <0.05 0.30 41 ---0.27 36 <0.0005 <0.0005 <0.0005 <0.0005 QCDUP-5 (MW-61) --- 10/18/11 <0.05 0.23 ---<0.05 <0.0005 <0.0005 <0.0005 <0.0005 QCDUP-6 (MW-69) --- 10/18/11 <0.05 0.36 41 ---0.12 36 <0.0005 <0.0005 <0.0005 <0.0005 QCDUP-7 (MW-31) --- 10/19/11 <0.05 0.058 ---<0.05 <0.0005 <0.0005 <0.0005 <0.0005 QCEB-1-PV --- 10/18/11 <0.05 <0.05 ---<0.05 0.00067 0.0053 0.00084 0.0041 QCEB-1-RM --- 10/18/11 <0.05 <0.05 ---<0.05 <0.0005 <0.0005 <0.0005 <0.0005 QCEB-2-PV --- 10/19/11 <0.05 <0.05 14 ---<0.05 14 <0.0005 <0.0005 <0.0005 <0.0005 QCEB-2-RM --- 10/19/11 <0.05 <0.05 ---<0.05 <0.0005 <0.0005 <0.0005 <0.0005 QCEB-3-PV --- 10/20/11 <0.05 0.057 41 ---<0.05 <0.0005 <0.0005 <0.0005 <0.0005 QCEB-4-PV --- 10/21/11 <0.05 <0.05 ---<0.05 <0.0005 0.0032 0.0005 0.00194 QCTB-1 --- 10/18/11 <0.05 --- --- ---<0.0005 <0.0005 <0.0005 <0.0005 QCTB-2 --- 10/19/11 <0.05 --- --- ---<0.0005 <0.0005 <0.0005 <0.0005 QCTB-3 --- 10/20/11 <0.05 --- --- ---<0.0005 <0.0005 <0.0005 <0.0005 QCTB-4 --- 10/21/11 <0.05 <0.05 ---<0.05 <0.0005 <0.0005 <0.0005 <0.0005 QCDUP-1 (MW-34)---1/19/12 <0.05 <0.05 ---<0.05 <0.0005 <0.0005 <0.0005 <0.0005 QCDUP-2 (MW-60)---1/19/12 <0.05 0.41 ---0.12 42 <0.0005 <0.0005 <0.0005 <0.0005 QCDUP-3 (MW-21)---1/20/12 <0.05 0.80 ---<0.05 <0.0005 <0.0005 <0.0005 <0.0005 QCDUP-4 (MW-32)---1/18/12 <0.05 0.15 41 ---<0.05 <0.0005 <0.0005 <0.0005 <0.0005 QCDUP-5 (MW-62)---1/18/12 <0.05 0.51 ---0.11 36 <0.0005 0.00055 <0.0005 0.00059 QCDUP-6 (MW-73)---1/19/12 <0.05 0.55 ---0.17 42 <0.0005 <0.0005 <0.0005 <0.0005 QCDUP-7 (MW-25)---1/18/12 <0.05 <0.05 ---<0.05 <0.0005 <0.0005 <0.0005 <0.0005 QCEB-1-PV ---1/18/12 <0.05 <0.05 ---<0.05 <0.0005 <0.0005 <0.0005 <0.0005 QCEB-1-RG ---1/18/12 <0.05 <0.05 ---<0.05 <0.0005 <0.0005 <0.0005 <0.0005 QCEB-2-PV ---1/19/12 <0.05 <0.05 ---<0.05 <0.0005 11 <0.0005 <0.0005 <0.0005 QCEB-2-RG ---1/19/12 <0.05 <0.05 ---<0.05 <0.0005 11 0.00056 <0.0005 <0.0005 QCEB-3-RG ---1/20/12 <0.05 <0.05 ---<0.05 <0.0005 <0.0005 <0.0005 <0.0005 QCTB-1 ---1/18/12 <0.05 --- --- ---<0.0005 <0.0005 <0.0005 <0.0005 QCTB-2 ---1/19/12 <0.05 --- --- ---<0.0005 11 <0.0005 <0.0005 <0.0005 QCTB-3 ---1/20/12 <0.05 --- --- ---<0.0005 <0.0005 <0.0005 <0.0005 Explanations: J = The reported value is below the Method Reporting Limit should be considered an estimate. 2 = Sample ID also known as W-21-MW2 by Mobile Chem Labs Inc. analytical data and Applied GeoSystems'Subsurface Environmental Investigation Report dated October 31, 1989. 3 = Sample ID also known as W-25-MW3 by Chemwest Analytical Labs Inc. analytical data & within Applied GeoSystems'Subsurface Environmental Investigation Report dated October 31, 1989. 4 = Sample exhibits fuel pattern that does not resemble standard. 5 = Lighter hydrocarbons contributed to the quantitation. 6 = Heavier hydrocarbons contributed to the quantitation. 7 = Sample exhibits unknown single peak or peaks. 8 = QA/QC samples collected by Clayton Group Associates. 9 = The method reporting limit for TPHd is increased due to interference from gasoline-range hydrocarbons. 10 = Repeated analysis yielded inconsistent results for TPHg. The highest recovery value of has been reported, but should be considered an estimate. 11 = Matrix Spike/Matrix Spike Duplicate Results for the analyte Benzene were affected by the analyte concentration already present in the un-spiked sample. 12 =Samples collected by Clayton Group Services for Unocal: Lincoln/Weber. 13 =The silica gel extract for TPHd contained a slight contamination from the material in the extract vial cap. These compounds were subtracted from the TPH value. 14 = Surrogate recovery for Method 8015 is above/outside the control limit(s). This may indicate a bias in the analysis due to the sample's matrix or an interference with the surrogate from compounds present in the sample. I:\Tidewater\TW Stockton (P2A)\Tables\QMR Tables\2012\1Q12\20120305-Parcel2A (Tables 4,5,6,7) Historical GW Tables 1Q12-CL.xlsx Page 65 of 67