Laserfiche WebLink
Remedial Investigation QAPP <br /> Stockton Army Aviation Support Facility,California <br /> Table 17-3 VAP Sampling Design and Rationale <br /> Area of <br /> Interest/ Target Sample -• Sampling <br /> Potential Figure Location Identifier Sample Identifier Number of Samples (feet bgs) Tool Analyte Group Rationale <br /> Release <br /> Area <br /> STK-GW01 STK-GW01-[start depth]-[end depth] Up to 4 PFAS,Target 40 Evaluate groundwater at potential source area at <br /> Compound List A01 3 <br /> (EPA Method Evaluate groundwater upgradient of A01 3 in the <br /> STK-GW02 STK-GW02-[start depth]-[end depth] Up to 4 1633) west direction <br /> STK-GW03 STK-GW03-[start depth]-[end depth] Up to 4 TPHd,TPHg, Evaluate groundwater upgradient of A01 3 in the <br /> VOC southwest direction <br /> STK-GW04 STK-GW04-[start depth]-[end depth] Up to 4 Rotosonic Evaluate groundwater upgradient of A01 3 beyond <br /> Soil lithology boring to 60 feet. Grab drilling and the Facility boundary <br /> A01 1, groundwater samples collected at <br /> Figure push- Evaluate groundwater at the known release area <br /> A01 2, and 17.2 STK-GW05 STK-GW05-[start depth]-[end depth] Up to 4 intervals of 15 feet or more,targeted to Groundwater ahead at A01 1 <br /> A01 3 high permeability zones determined by <br /> soil lithology boring sampling <br /> device PFAS,Target 40 Evaluate groundwater immediately downgradient <br /> STK-GW06 STK-GW06-[start depth]-[end depth] Up to 4 Compound List of A01 1 <br /> (EPA Method <br /> 1633) Evaluate groundwater side gradient of A01 1 and <br /> STK-GW07 STK-GW07-[start depth]-[end depth] Up to 4 potentially downgradient of A01 3 beyond the <br /> Facility boundary <br /> Evaluate groundwater side gradient of A01 1 and <br /> STK-GW08 STK-GW08-[start depth]-[end depth] Up to 4 potentially downgradient of A01 3 beyond the <br /> Facility boundary <br /> Total Samples(not including QC) 32 <br /> Notes: <br /> A01 =area of interest TPHd =total petroleum hydrocarbons as diesel <br /> bgs= below ground surface TPHg=total petroleum hydrocarbons as gasoline <br /> EPA= Environmental Protection Agency QC= quality control <br /> GW=groundwater VAP=Vertical Aquifer Profiling <br /> PFAS = per-and polyfluoroalkyl substances <br /> PARSONS Worksheet#17&18:Sampling Design and Rationale <br /> Page 119 <br />