Laserfiche WebLink
Stantec <br /> L & M OPERABLE UNIT- FOURTH QUARTER AND ANNUAL 2012 SITE STATUS, <br /> REMEDIAL SUMMARY, AND GROUNDWATER MONITORING REPORT <br /> Groundwater Monitoring and Sampling <br /> February 1, 2013 <br /> Number of Number of Minimum Maximum <br /> Detections A-Zone Wells Detected Detected <br /> Constituents above the MRL Analyzed Concentration in Concentration in <br /> mg/L (Well ID) mg/L (Well ID) <br /> TPHg 4 4 0.1 (2AMW-12) 3.6 (MW-18) <br /> TPHd 3 4 1.3 (2AMW-12) 3.1 (MW-20) <br /> TPHo 1 4 --- 0.071 (MW-9) <br /> Benzene 1 4 --- 0.0058 (MW-9) <br /> Toluene 1 4 --- 0.00055 (MW-9) <br /> Xylenes 2 4 0.00086 (MW-9) 0.0013 (MW-18) <br /> MtBE 1 4 --- 0.00098 (MW-9) <br /> TBA 1 4 --- 0.028 (MW-9) <br /> Definitions: <br /> ID = Identification <br /> mg/L = Milligrams per liter <br /> MRL = Method reporting limit <br /> MtBE= Methyl tertiary butyl ether <br /> TBA = Tertiary butyl alcohol <br /> TPHd = Total petroleum hydrocarbons as diesel <br /> TPHg = Total petroleum hydrocarbons as gasoline <br /> TPHo = Total petroleum hydrocarbons as motor oil <br /> --- = Not applicable <br /> 2.3.2.3 Dissolved Arsenic <br /> Dissolved arsenic is not required during the first, second, and fourth quarter per MRP <br /> No. R5-2012-0805. <br /> 2.3.2.4 Quality Assurance/Quality Control Samples <br /> TPHd, TPHo, TPHg, BTEX compounds, and fuel oxygenates (MtBE and TBA) were not <br /> detected at or above laboratory MRLs within Stantec's equipment blanks QCEB-1-RM, <br /> QCEB-1-PV, QCEB-2-RM, and QCEB-2-PV. <br /> Duplicate samples QCDUP-1 was collected from L&M OU shallow zone well MW-9 during 4Q12 <br /> sampling event. A comparison of the samples is shown below. <br /> I:\Tidewater\TW Stockton(P2A)\QMRs\2012\4Q12-Ann ual\4Q12 and Annual QSSR QRSR QMR Stockton_FINAL.doc 2.4 <br />