Monitoring Well Monitoring Well Sampling Sampling
Dec 24, 2015
Monitoring Well SamplingMonitoring Well Sampling
SAP (Sampling Analysis Plan)SAP (Sampling Analysis Plan) FrequencyFrequency PurgingPurging Pumps and BailersPumps and Bailers Bottles and MaterialsBottles and Materials
SAPSAPSampling Analysis PlanSampling Analysis Plan
Written statement of sampling Written statement of sampling objectivesobjectives
Provides a scheduleProvides a schedule ProceduresProcedures Written documentation for outside Written documentation for outside
evaluationevaluation Vehicle provisionsVehicle provisions
Conducting a Sampling Conducting a Sampling EventEvent
Sample Point InspectionSample Point Inspection
Prior to sampling, inspect the wellPrior to sampling, inspect the well Identifying markersIdentifying markers Is surface sealedIs surface sealed Check for weathering of outer surfaceCheck for weathering of outer surface
Headspace ScreeningHeadspace Screening Record ambient or background readingsRecord ambient or background readings
Water Level MeasurementWater Level Measurement According to Sampling Analysis PlanAccording to Sampling Analysis Plan
Well Purging and Field Parameter MeasurementWell Purging and Field Parameter Measurement Select purging device based on possible material/sample Select purging device based on possible material/sample
interactionsinteractions Corrosion of steel parts Corrosion of steel parts
Low pH, high OLow pH, high O2 2 content, high COcontent, high CO22, high TDS, high iron bacteria…, high TDS, high iron bacteria… Degradation of plastic materialsDegradation of plastic materials
High concentrations of chlorinated solventsHigh concentrations of chlorinated solvents Adsorption and later desorption of metals or organic compounds from Adsorption and later desorption of metals or organic compounds from
solid surfacessolid surfaces Leaching from plastic materialsLeaching from plastic materials
Pumps vs. bailersPumps vs. bailers Low flow vs. high flow return ratesLow flow vs. high flow return rates Dedicated vs. portable purging/sampling equipmentDedicated vs. portable purging/sampling equipment
If multiple samples are necessary, dedicated equipment will ease the If multiple samples are necessary, dedicated equipment will ease the decontamination processdecontamination process
Cost of purchase and operationCost of purchase and operation Calibrate the equipmentCalibrate the equipment Organize all suppliesOrganize all supplies
Gloves, sample containers, preservatives, filters, labels, field Gloves, sample containers, preservatives, filters, labels, field notebook, etc.notebook, etc.
Sample Collection ProceduresSample Collection Procedures
Order of container fillingOrder of container filling
Sample Collection ProtocolsSample Collection Protocols Sample should never come in contact with Sample should never come in contact with
anything but the interior of the sample container anything but the interior of the sample container (cannot touch the mouth of the container)(cannot touch the mouth of the container)
Caps kept on container until the moment the Caps kept on container until the moment the container is to be filledcontainer is to be filled
As little atmospheric influence a possible, little As little atmospheric influence a possible, little contact with ambient aircontact with ambient air
For VOCs, no headspace, need a positive miniscusFor VOCs, no headspace, need a positive miniscus Collection field QC SamplesCollection field QC Samples
Trip blanks, temperature blanks, field blanks, Trip blanks, temperature blanks, field blanks, equipment blanks, blind duplicate blanks, field equipment blanks, blind duplicate blanks, field spiked blanks, field split blanksspiked blanks, field split blanks
Pretreatment ProceduresPretreatment Procedures FiltrationFiltration
PreservingPreserving PhysicalPhysical
Appropriate Appropriate containercontainer
Adequate Adequate packingpacking
Adequate Adequate temperaturetemperature
Chemical Chemical
PreservativesPreservatives
Cleaning the equipmentCleaning the equipment Water-level gauges, probes, flow-thru Water-level gauges, probes, flow-thru
cells, pump and tubingcells, pump and tubing Delivery to labDelivery to lab
Well Deserved Beverage!!Well Deserved Beverage!!