Vapor Intrusion (VI) Investigation Using the TAGA Mobile - PowerPoint PPT Presentation

Vapor Intrusion (VI) Investigation Using the TAGA Mobile Laboratories CLU-IN Webinar 29 August 2018 David Mickunas US EPA/ERT

TAGA MOBILE LABORATORY

Trace Atmospheric Gas Analyzer (TAGA) Mobile Laboratories

Trace Atmospheric Gas Analyzer (TAGA)

Low Pressure Chemical Ionization (LPCI) Source

TAGA Operational Process Animation

Parent/Daughter Ion Concentration Profile for Trichloroethene

Parent/Daughter Ion Profile for Trichloroethene

Gas Chromatograph/Mass Spectrometer with Loop Injector for Analysis of Volatiles Compounds Collected in Tedlar Bags

10-Port Valve Load Position 10-Port Valve Injecton Position (flow in direction of arrow) (flow in direction of arrow) Carrier In Carrier In Carrier Out Carrier Out To GC To GC Internal Internal Standard Standard Load Load 1 1 2 1 2 1 Sample Vent Sample Vent 9 3 9 3 0 0 50 uL 50 uL Loop Loop 8 8 4 4 5 5 7 6 7 6 Internal Internal Standard Standard Vent Vent 5 mL 5 mL Sample Load Loop Loop Sample Load 10-Port Gas Valve Sample Introduction System For The GC/MS

Driver and Passenger Seating with Monitor

VAPOR INTRUSION

Comparison Between Water And Air Contamination WATER Basis: 2 liters/day Assume: TCE concentration is 5 ppb or 5 micrograms/liter (µg/L) Daily impact: 2 L/day * 5 µg/L = 10 µg/day AIR Basis: 20 cubic meters/day Assume: TCE concentration is 1 ppbv or 5.4 micrograms/cubic meter (µg/m 3 ) Daily impact: 20 m 3 /day * 5.4 µg/m 3 = 108 µg/day

Lines of Evidence: • Groundwater spatial (and vertical profiling, if appropriate) data with modeling • Potable groundwater analysis • Soil gas spatial concentrations (and vertical profiling, if appropriate), including subslab, with vertical profiling • Ambient, crawlspace, and inside air concentrations and source determinations • Building construction and conditions • Constituent ratios

Groundwater Spatial (and Vertical Profiling, if Appropriate) Data With Modeling Well Field Site Overburden Groundwater Installation Drilling Operations Oil Bailer Operations Groundwater Sampling Operations Soil Gas Probe Installation Drilling Operations Hollow Stem Augers with Geoprobe Membrane Interface Probe with Geoprobe

Soil Gas Spatial Concentrations (and Vertical Profiling, if Appropriate), Including Subslab, with Vertical Profiling Sorbent Tubes Tedlar Bag Sampling Summa Canister with Flow Regulator and 3-Way Valve Sampling Analyses Slab-Slab Probe Permanent Gas – Gas Chromatograph Volatile Organic Compounds – Gas Chromatograph/Mass Spectrometer TAGA Mobile Laboratory

Ambient, Crawlspace, and Inside Air Concentrations and Source Determinations Indoor Air Sampling Ambient Air Sampling Crawlspace Air Sampling B N E E Z E N ( H A Z 4 1 9 0 ) A B C E G I J K M Q O R T V X Z A A B B D D F F G G I I J J 3 B . 5 D F H L N P S U W Y C C E E H H 3 P . 0 P 2 i n . 5 H L s 2 t i . 0 1 . 5 n 1 U . 0 Q L 0 . 5 D L 0 . 0 0 5 1 0 1 5 2 0 5 2 3 0 T i m e I n M i n t e s u T L O U E N E ( H A Z 4 1 9 0 ) 8 A B C D F E G H I J L N K M O P Q R S T U V W X Y Z A A B B C C D D E E F F H H G G I I J J 7 B P P n 6 i s t 5 n i 4 U 3 Q L 2 D L 1 0 0 5 1 0 i m T e I n 1 M 5 i n u t e s 2 0 2 5 0 3 Monitoring Lifestyle Sources X Y L E E N ( H Z A 4 1 9 0 ) 5 . 0 A B C E G I J K M Q O R T V X Z A A B B D D F F G G I I J J 4 B P . 5 D F H L N P S U W Y C C E E H H 4 . 0 P 3 . 5 n i 3 t s . 0 2 . 5 n i Monitoring Outside Ambient Air Sources 2 . 0 U 1 . 5 Q L 1 . 0 0 . 5 D L 0 . 0 0 5 0 1 T i m e I n M 1 5 i n t e s u 2 0 2 5 3 0 BENZENE (HAZ4291) 5.0 A B C D EF G I J K M O P Q S T U W Y Z AA BB CC EE FF HH H L N R V X DD GG II 4.5 4.0 3.5 3.0 HL 2.5 Units in PPB 2.0 QL 1.5 1.0 DL 0.5 0.0 0 5 10 15 20 25 30 Time In Minutes TOLUENE (HAZ4291) BENZENE (HAZ6039) 9 A B C D EF G I J K M O P Q S T U W Y Z AA BB CC EE FF HH 1000 H L N R V X DD GG II 8 QL A B C E G I K M O QR S T U W Y AA CC EE GG II JJ KK LL MM 900 D F H J L N P V X Z BB DD FF HH 7 800 700 6 600 5 500 Units in PPB 4 Units in PPB 400 3 DL 300 2 200 1 100 0 DL 0 0 QL HL 5 10 15 20 25 30 0 5 10 15 Time In Minutes 20 25 30 Time In Minutes T e t r a c h l o r o e t h e n e ( A R M N 0 2 2 ) 3 0 A B C D E F G H I J K L M N O TOLUENE (HAZ6039) XYLENE (HAZ4291) 2 5 10 6 n i t s i n p p b v A B C E G I K M O QR S T U W Y AA CC EE GG II JJ KK LL MM A B C D EF G I J K M O P Q S T U W Y Z AA BB CC EE FF HH 9 D F H J L N P V X Z BB DD FF HH H L N R V X DD GG II 2 0 5 8 7 1 5 4 6 U 3 1 0 5 Units in PPB (Thousands) Units in PPB 4 2 5 3 Q L 1 2 0 D L 1 QL 0 . 0 2 . 5 5 . 0 7 . 5 1 0 . 0 1 2 . 5 1 5 . 0 DL DL 0 T i m e i n m i n u t e s QL 0 0 5 10 15 20 25 30 0 5 10 Time In Minutes 15 20 25 30 Time In Minutes XYLENE (HAZ6039) 2250 A B C E G I K M O QR S T U W Y AA CC EE GG II JJ KK LL MM 2000 D F H J L N P V X Z BB DD FF HH Fig u r e 18 a Fig u r e 18 a M ob ile M on ito ring P a th T w o , A R M N 02 2 M ob ile M on ito ring P a th T w o , A R M N 02 2 1750

Building Construction And Conditions Multi-Apartment Building Historical Pre-Revolutionary Era Brick House Split-Level House Ann Arbor, MI Dover, DE Hopewell, NY Single – story House with Crawlspace Historical Revolutionary Era Stone House 2-Story New Construction House Hereford Township, PA San Antonio, TX Hopewell, NY Hand-Dug Earthen Tunnel Basement Stone-Walled Basement Rough Poured Cement Floor with Hand-Hewned Posts