Andy Rezendes, Alpha Analytical Labs

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www.alphalab.comPost – Sampling, when am I done?• Ambient air samples –should have some vacuum left incanister (i.e. 5 in. Hg) – more critical if not• Soil vapor samples –should have some vacuum left incanister (i.e. 5 in. Hg) – less critical if not• Grab samples – final vacuum not critical, can go to 0 in.Hg• Greater than 15 in. Hg – may be a need for dilution
Atmospheric Background of VOCswww.alphalab.comCompoundTypicalConcentrationChloromethane0.5 ppbV / 1.03 ug/m 3DichlorodifluoromethanePetroleum / Combustion-relatedcompoundsCarbon Tetrachloride(10 -6 = 0.16 ug/m 3 )CH 4 + ClUV2 CH 3 Cl + HCl0.5 ppbV / 2.5 ug/m 3Benzene = 0.1 ppbV / 0.32 ug/m30.1 ppbV / 0.63 ug/m 3
Page 1 and 2: Analytical Methods forAir and Vapor
Page 3: www.alphalab.comAnalytical Methods
Page 6 and 7: Air Sampling EquipmentCanisters (FS
Page 8 and 9: www.alphalab.comCanister Sampling D
Page 10 and 11: General PrinciplesAmbient Air Sampl
Page 14 and 15: Subslab Mitigation Systems andPVC C
Page 16 and 17: MADEP Vapor Intrusion GuidanceWSC#
Page 18 and 19: MADEP Guidance-SamplingIndoor Airww
Page 20 and 21: • “Hybrid method” of TO-15 an
Page 22 and 23: CAM Methods for TO-15and APHwww.alp
Page 24 and 25: CT & RI RSR Criteriawww.alphalab.co

Andy Rezendes, Alpha Analytical Labs

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