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!!