+ Multi-level soil gas<strong>and</strong> groundwatersampling pointlocations; also usedfor differentialpressures, soilmoisture, <strong>and</strong> soiltemperature5• Conventionalgroundwater wellsFigure 3. Plan view layout of in situ monitoring point locations.Table 1. Sampling network specifics (see Figure 3 for locations).Soil Gas SamplingGroundwater SamplingLocation Depth [ft Below Slab] Location Depth [ft BGS]A SS 3 6 9 GW1 16 33 42B SS 3 6 9 GW2 16 33 42C SS 3 6 9 GW3 14 23 30D SS 3 6 9 GW4 13 21 30E SS 3 6 9 IGW1 9* 9* 9*F SS 3 6 9 IGW2 9* 9* 9*1 SS 3 6 9* IGW3 9* 9* 9*2 SS 3 6 9* IGW4 9* 9* 9*3 SS 3 6 9* IGW5 9* 9* 9*4 SS 3 6 9* IGW6 9* 9* 9*5 SS 3 6 9*6 SS 3 6 9*7 SS* water-saturated conditions sometimes exist at gas sampling 9 ft below-slab depths, <strong>and</strong>may be used as groundwater sampling points labelled as IGW1-9*, IGW2-9*, etc.4
Table 2. Measurements, analytical methods, instruments used <strong>and</strong> data generated at the studyhouse since February 2010.Key site measurementsDatagenerationdurationAnalytical methods <strong>and</strong> frequqncySampling media <strong>and</strong> locationData QA/QCReal-time soil gas vs. indoor airpressure differentialAugust 2010-presentDifferential pressure presssure sensors connectedto data logger system; reading every 2 minutesAll sub-slab locations outside Sensors are re-zeroed every<strong>and</strong> beneath building founcation dayReal-time soil temperatureReal-time soil mositureReal-time soil O 2 concetrationsReal-time indoor air, outdoor Air<strong>and</strong> AC temperatureAugust 2010-presentAugust 2010-presentAugust 2010-presentDecember2010-presentSoil temperaure sensors coonected to data loggersystem; reading every 2 minutesSoil mositure sensors connected to data loggersystem, reading every 10 minutesO 2 sensors connected to data logger; reading every10 minutesThermocouples connected to data logger; readingevery 2 minutesSelected location outdoor C <strong>and</strong>indoor location 1 at multipledepthsSelected location outdoor #C<strong>and</strong> indoor location #1 atmultiple depthsAll soil gas locations at subslab,3-ft below slab (BS) <strong>and</strong> 6-ft BSMultiple locations such asIndoor, garage, AC duct, atticoutdoorN/AData are checked against thedata from soil samplesO 2 sensor calibrationN/AWeather station: wind speed <strong>and</strong>direction, barometric pressure,precipitation, humidityAugust 2010-presentCollected by a on-site data logging weather station;reading every 10 minutesWeather conditions at the siteData are checked againstlocal government weatherrecordsReal-time indoor <strong>and</strong> outdoor airsampling chlorinated compoundconcentrationsNovember2010-presentCollected by thermal desorption tube followed bydesorption <strong>and</strong> analysis by Unity-GC-MS in ASUlab; 4-hour time-averaged indoor air samplingCollected <strong>and</strong> analyzed on site suing HAPSITEFebruary 2010-unit provided by Hill Air Force Base; 2-hour timeaveragedpresentsamplingIndoor air sampling in livingroom downstairsIndoor air sampling under thestairsData are checked against datafrom different methods <strong>and</strong>st<strong>and</strong>ard QA/QC procuduressuch as blanks, calibrations,internal st<strong>and</strong>ardsReal-time soil gas sampling, indoor<strong>and</strong> outdoor air chlorinatedcompound concentrationsFebruary 2010-presentCollected by SRI 10-stream auto-sampler ontothermal desorption tubes followed by desorption<strong>and</strong> analysis using on-site GC-TO-14-ECD;sampling every 5 hours from each selected locationIndoor air sampling in livingroom downstairs, outdoor air<strong>and</strong> selected soil gas samplesData are checked against datafrom different methodsReal-time indoor air <strong>and</strong> soil gasSF 6 sampling (Not in the proposal)December2010-presentCollected by SRI 10-stream auto-sampler <strong>and</strong>analyzed by GC-PDD; sampling every 2 hoursfrom each selected locationsSF 6 is released continously at 5ml/min indoor. Sampling atselected soil gas locations,indoor air <strong>and</strong> outdoor airA st<strong>and</strong>ard is run every 5hoursReal-time indoor air radonsampling (Not in the proposal)February 2010-presentCollected <strong>and</strong> anallyzed on site by Durridge radondetector; 2-hour time-averaged indoor air samplingSampling indoor air downstairsInstrument calibrated every 6monthsReal-time groundwater fluctuationNovember2010-presentIn Situ Solinst level-logger; sampling every 12hoursSampling at GW3 at threedepthsN/AMonthly on-site soil gas SF 6 , radon<strong>and</strong> chlorianted compounds,dissolved chlorianted compounds ingroundwater, groundwater tablelevelAugust 2010-present**SF 6 started inDecember2010, Radonstarted inFebruary 2011Soil gas samples collected using lung-sampler <strong>and</strong>tedlar bags, then analyzed on site using GC-TO-14-DELCD, GC-DELCD, GC-PDD; groundwatercollected <strong>and</strong> preserved in 40-ml vials thentransported back to ASU lab for analysis using GC-DELCD; water level data collected using Solinstwater lever sounder; soil gas radon analyzed byDurridge radon detector; sampling every monthAll available soil gas <strong>and</strong>groundwater locationsData are checked usingblanks, duplicates, replicatestrip blanks, sets ofcalibrations ect.In situ effective diffusioncoefficientsJuly 2011-presentHelium detector; sampling every monthAll available soil gas samplingpointshelium detector calibrated,duplicates, replicates5
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