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Note: EPA no longer updates this information, but it may be useful as a reference or resource.


Air Screening Data - Trace Atmospheric Gas Analyzer (TAGA)

Test Results

EPA collected air screening samples from multiple locations across the New Orleans metropolitan area starting on September 12. The samples were analyzed for volatile priority pollutants such as benzene, toluene, and xylene, which are commonly found in gasoline, as well as other industrial solvents. EPA used two of its Trace Atmospheric Gas Analyzer (TAGA) buses. The TAGA is a self-contained mobile laboratory capable of continuous, real-time sampling and analysis. It can detect chemicals in the low parts per billion levels of outdoor air or emissions from various environmental sources. TAGA monitoring results are only used for screening and represent the status of the air at the time of sampling. These screening data were evaluated against the Agency for Toxic Substances and Disease Registry (ATSDR) air short-term health guidance values in order to provide an initial assessment of air quality.

The screening results indicated that chemical concentrations in most areas are below ATSDR guidance values. The low level of volatile pollutants is not surprising as contaminants may be bound to the sediment. Monitoring data in the vicinity of the Murphy Oil spill revealed some elevated levels of benzene and xylene that are associated with the petroleum release. Long-term exposure (a year or longer) at the levels measured would be required for health effects to be of concern. On October 2, confirmation sampling of the cleanup response to Murphy Oil (St. Bernard Parish) resulted in the detection of low levels of volatile pollutants that were below the ATSDR guidance values.

On October 13th, the TAGA detected benzene at 230 ppb at the point where Williams Boulevard passes underneath US Interstate 10. EPA believes based on its best professional judgement and historical knowledge of TAGA's capability to detect low levels of emissions from vehicular traffic, that the elevated benzene was due to exhaust from vehicles traveling on US Interstate 10 and the recent increase of vehicular traffic in the area. Levels of benzene in the surrounding area were below the Agency for Toxic Substances and Disease Registry's (ATSDR) acute (24 hr), health guidance values.

These initial results represent the beginning of extensive sampling efforts and do not represent all air conditions throughout the area. As this is a dynamic situation, general conclusions should not be made regarding air safety based on results from this snapshot of data.

More information about the TAGA bus

Results for 10/15/05: bus 1
Results for 10/13/05: bus 1
Results for 10/12/05: bus 1
Results for 10/11/05: bus 2
Results for 10/10/05: bus 1
Results for 10/9/05: bus 1
Results for 10/8/05: bus 2
Results for 10/7/05: bus 2
Results for 10/6/05: bus 2
Results for 10/5/05: bus 1
Results for 10/4/05: bus 1
Results for 10/3/05: bus 1
Results for 10/2/05: bus 1
Results for 9/18/05: bus 1
Results for 9/17/05: bus 1
Results for 9/16/05: bus 1
Results for 9/15/05: bus 1
Results for 9/15/05: bus 2
Results for 9/14/05: bus 1
Results for 9/14/05: bus 2
Results for 9/13/05: bus 1
Results for 9/13/05: bus 2
Results for 9/12/05: bus 1


Mobile Monitoring (TAGA-1) Results for 10/15/05

Constituent ATSDR Sampling Event NOL124 Sampling Event NOL126 Sampling Event NOL127
  24-h MRL (acute) ppbv Location ppbv Location ppbv Location
Benzene 50 ppb 24.0 Intersection of Airline Park Boulevard and US Highway 61; proceeding west 6.8 Intersection of Williams Boulevard and Vintage; Jefferson Parish 12.5 Intersection of Williams Boulevard and Airline Avenue; Jefferson Parish
Toluene 1000 ppb 26.0 Intersection of Airline Park Boulevard and US Highway 61; proceeding west 12.4 Intersection of Williams Boulevard and Vintage; Jefferson Parish 180.0 Intersection of Williams Boulevard and Airline Avenue; Jefferson Parish
Xylene 1000 ppb 14.0 Intersection of Airline Park Boulevard and US Highway 61; proceeding west 11.0 Intersection of Williams Boulevard and Vintage; Jefferson Parish 21.0 Intersection of Williams Boulevard and Airline Avenue; Jefferson Parish

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Mobile Monitoring (TAGA-1) Results for 10/13/05

On October 13th, the TAGA detected benzene at 230 ppb at the point where Williams Boulevard passes underneath US Interstate 10. EPA believes based on its best professional judgement and historical knowledge of TAGA's capability to detect low levels of emissions from vehicular traffic, that the elevated benzene was due to exhaust from vehicles traveling on US Interstate 10 and the recent increase of vehicular traffic in the area. Levels of benzene in the surrounding area were below the Agency for Toxic Substances and Disease Registry's (ATSDR) acute (24 hr), health guidance values.
Constituent ATSDR Sampling Event NOL116 Sampling Event NOL117 Sampling Event NOL118 Sampling Event NOL119
  24-h MRL (acute) ppbv Location ppbv Location ppbv Location ppbv Location
Benzene 50 ppb 10.0 Intersection of Riverside Drive and Donelon Drive; Jefferson Parish 8.2 Intersection of Dickory Avenue and Dock Street; Jefferson Parish 48.0 Dickory Street Between Earhart Expressway ramp and Airline Highway; Jefferson Parish 230.0 Williams Boulevard passing under US Interstate 10
Toluene 1000 ppb 30.0 Intersection of Jefferson Highway and Hort Street; Jefferson Parish 9.0 Intersection of Dickory Avenue and Citrus Boulevard; Jefferson Parish 55.0 Dickory Street Between Earhart Expressway ramp and Airline Highway; Jefferson Parish 560.0 Williams Boulevard passing under US Interstate 10
Xylene 1000 ppb 18.5 Intersection of Jefferson Highway and Hort Street; Jefferson Parish 7.4 Intersection of Elmwood Park Boulevard and Pepsi Street; Jefferson Parish 18.0 Dickory Street Between Earhart Expressway ramp and Airline Highway; Jefferson Parish 220.0 Williams Boulevard passing under US Interstate 10

Constituent ATSDR Sampling Event NOL120
  24-h MRL (acute) ppbv Location
Benzene 50 ppb 29.0 Intersection of Veterans Boulevard and Williams Boulevard; Jefferson Parish
Toluene 1000 ppb 94.0 Intersection of Williams Boulevard and 25th Street; Jefferson Parish
Xylene 1000 ppb 27.0 Intersection of Veterans Boulevard and Williams Boulevard; Jefferson Parish

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Mobile Monitoring (TAGA-1) Results for 10/12/05

Constituent ATSDR Sampling Event NOL107 Sampling Event NOL108 Sampling Event NOL109 Sampling Event NOL110
  24-h MRL (acute) ppbv Location ppbv Location ppbv Location ppbv Location
Benzene 50 ppb 7.9 Argonne Street and Clearview Parkway; Jefferson Parish 4.0 Intersection of West Esplanade Avenue and Causeway Boulevard; Jefferson Parish 1.7 Intersection of Hammond Highway and Fleur de Lis Drive; Jefferson Parish 7.8 7306 Lakeshore Drive; Jefferson Parish
Toluene 1000 ppb 16.0 Argonne Street and Clearview Parkway; Jefferson Parish 6.8 Intersection of West Esplanade Avenue and Causeway Boulevard; Jefferson Parish 19.5 Lakeshore Drive at Shelter No. 1; Jefferson Parish 12.5 7306 Lakeshore Drive; Jefferson Parish
Xylene 1000 ppb 20.0 Argonne Street and Clearview Parkway; Jefferson Parish 7.2 Intersection of West Esplanade Avenue and Causeway Boulevard; Jefferson Parish 21.0 Lakeshore Drive at Shelter No. 1; Jefferson Parish 11.0 7306 Lakeshore Drive; Jefferson Parish

Constituent ATSDR Sampling Event NOL111 Sampling Event NOL112
  24-h MRL (acute) ppbv Location ppbv Location
Benzene 50 ppb 4.0 Starting Run on Fleur de Lis Drive; Jefferson Parish 11.0 Intersection of Clearview Parkway at Persimmon Avenue; Jefferson Parish
Toluene 1000 ppb 4.0 Intersection of Harrison Avenue and Marshal Foch Street; Jefferson Parish 11.5 Intersection of Clearview Parkway at Persimmon Avenue; Jefferson Parish
Xylene 1000 ppb 3.0 Intersection of Harrison Avenue and Canal Boulevard; Jefferson Parish 11.0 Intersection of Clearview Parkway at Persimmon Avenue; Jefferson Parish

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Mobile Monitoring (TAGA-2) Results for 10/11/05

Constituent ATSDR Sampling Event NOL100 Sampling Event NOL101 Sampling Event NOL102 Sampling Event NOL103
  24-h MRL (acute) ppbv Location ppbv Location ppbv Location ppbv Location
Benzene 50 ppb 3.9 4 miles east of Louisiana Technical College on Earhart 4.0 Intersection of North Peters Street and Saint Louis; French Quarter 4.9 Intersection of Toulouse Street and Decatur Street; French Quarter 0.8 Intersection of Rowley and Perrin Drive; Saint Bernard Parish
Toluene 1000 ppb 50.0 4 miles east of Louisiana Technical College on Earhart 14.0 Intersection of Saint Ann and Decatur; French Quarter 10.0 Intersection of Toulouse Street and Decatur Street; French Quarter 4.4 Intersection of Poplar Street and Friscoville Avenue; Saint Bernard Parish
Xylene 1000 ppb 5.9 4 miles east of Louisiana Technical College on Earhart 13.5 Intersection of Chartres Street and Nicholls Street; French Quarter 11.5 Intersection of Toulouse Street and Decatur Street; French Quarter 2.6 Intersection of Saint Claude Avenue and Mehle Avenue; Saint Bernard Parish

Constituent ATSDR Sampling Event NOL104
  24-h MRL (acute) ppbv Location
Benzene 50 ppb 3.4 Intersection of Jackson Blvd. and LA State Highway 39; Saint Bernard Parish
Toluene 1000 ppb 16.5 Intersection of Jacob Drive and Missouri Street; Saint Bernard Parish
Xylene 1000 ppb 13.5 Intersection of Jackson Blvd. and LA State Highway 39; Saint Bernard Parish

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Mobile Monitoring (TAGA-1) Results for 10/10/05

Constituent ATSDR Sampling Event NOL090 Sampling Event NOL091 Sampling Event NOL092 Sampling Event NOL093
  24-h MRL (acute) ppbv Location ppbv Location ppbv Location ppbv Location
Benzene 50 ppb 1.8 2 miles northwest of US Interstate 10 Exit 254 on Highway 11 41.0 US Highway 11 between Carey Street and Maine Avenue; Saint Tammany Parish 2.0 LA State Highway 41 merging with US Highway 11 South; Saint Tammany Parish 7.8 LA State Highway 1091 between Rosalie Drive and Tidewater Drive; Saint Tammany Parish
Toluene 1000 ppb 4.7 2 miles northwest of US Interstate 10 Exit 254 on Highway 11 145.0 US Highway 11 between Carey Street and Maine Avenue; Saint Tammany Parish 7.2 US Highway 11 South betweenCedar Lake and Oak Alley Drive; Saint Tammany Parish 22.0 LA State Highway 1091 between Rosalie Drive and Tidewater Drive; Saint Tammany Parish
Xylene 1000 ppb 4.3 2 miles northwest of US Interstate 10 Exit 254 on Highway 11 130.0 US Highway 11 between Carey Street and Maine Avenue; Saint Tammany Parish 6.6 US Highway 11 South betweenCedar Lake and Oak Alley Drive; Saint Tammany Parish 21.0 LA State Highway 1091 between Rosalie Drive and Tidewater Drive; Saint Tammany Parish

Constituent ATSDR Sampling Event NOL094 Sampling Event NOL095 Sampling Event NOL096
  24-h MRL (acute) ppbv Location ppbv Location ppbv Location
Benzene 50 ppb 15.5 Intersection of Gause Boulevard and Eastridge Drive; Saint Tammany Parish 13.5 Intersection of Bayou Liberty Road and Baldwin Drive; Saint Tammany Paish 15.0 Gas Station on Ponchartrain Street near Third Street; Saint Tammany Parish
Toluene 1000 ppb 28.0 Intersection of Gause Boulevard and Eastridge Drive; Saint Tammany Parish 33.0 Intersection of Bayou Liberty Road and Baldwin Drive; Saint Tammany Paish 94.0 Gas Station on Ponchartrain Street near Third Street; Saint Tammany Parish
Xylene 1000 ppb 28.0 Intersection of Gause Boulevard and Eastridge Drive; Saint Tammany Parish 33.0 Intersection of Bayou Liberty Road and Baldwin Drive; Saint Tammany Paish 70.0 Gas Station on Ponchartrain Street near Third Street; Saint Tammany Parish

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Mobile Monitoring (TAGA-1) Results for 10/9/05

Constituent ATSDR Sampling Event NOL081 Sampling Event NOL082 Sampling Event NOL083 Sampling Event NOL084
  24-h MRL (acute) ppbv Location ppbv Location ppbv Location ppbv Location
Benzene 50 ppb 31.0 7 miles east of Luling on US Highway 61 2.5 LA State Highway 18 passing Post Street; Saint Charles Parish 4.0 16709 LA State Highway 18 3.4 LA State Highway 18 at L Street; Saint Charles Parish
Toluene 1000 ppb 115.0 7 miles east of Luling on US Highway 61 4.7 LA State Highway 18 passing Post Street; Saint Charles Parish 4.5 16709 LA State Highway 18 4.9 LA State Highway 18 at L Street; Saint Charles Parish
Xylene 1000 ppb 113.0 7 miles east of Luling on US Highway 61 7.2 LA State Highway 18 passing Post Street; Saint Charles Parish 3.9 16709 LA State Highway 18 6.6 LA State Highway 18 at L Street; Saint Charles Parish

Constituent ATSDR Sampling Event NOL085 Sampling Event NOL086 Sampling Event NOL087
  24-h MRL (acute) ppbv Location ppbv Location ppbv Location
Benzene 50 ppb 3.3 16708 LA State Highway 18; Saint Charles Parish 15.5 LA State Highway 48 at Good Hope Road; Saint Charles Parish 8.4 LA State Highway 628 at Good Hope Road; Saint Charles Parish
Toluene 1000 ppb 23.0 16708 LA State Highway 18; Saint Charles Parish 45.0 LA State Highway 48 at Good Hope Road; Saint Charles Parish 3.5 LA State Highway 628 at Gate 44; Saint Charles Parish
Xylene 1000 ppb 9.6 16708 LA State Highway 18; Saint Charles Parish 47.0 LA State Highway 48 at Good Hope Road; Saint Charles Parish 2.9 Evangeline Road at Four J Land; Saint Charles Parish

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Mobile Monitoring (TAGA-2) Results for 10/8/05

Constituent ATSDR Sampling Event NOL077 Sampling Event NOL078
  24-h MRL (acute) ppbv Location ppbv Location
Benzene 50 ppb 3.7 LA State Highway 23 near the Oronite Oak Point plant 4.4 LA State Highway 3017 between Bayou Road and Peters Road; Plaquemines Parish
Toluene 1000 ppb 17.0 LA State Highway 23 near Overseas Avenue 14.5 LA State Highway 3017 near 2842 Peters Road; Open burning on right; Plaquemines Parish
Xylene 1000 ppb 35.0 LA State Highway 23 near Overseas Avenue 16.0 LA State Highway 3017 near Concord Road; Plaquemines Parish

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Mobile Monitoring (TAGA-2) Results for 10/7/05

Constituent ATSDR Sampling Event KAT088 Sampling Event KAT089 Sampling Event KAT090
  24-h MRL (acute) ppbv Location ppbv Location ppbv Location
Benzene 50 ppb 14.5 Near intersection of 406 and Delacroix Road; Orleans Parish 6.0 River Road passing over Oliver Road; Orleans Parish 3.0 On the Belle Chase Ferry; Orleans Parish
Toluene 1000 ppb 8.8 Near intersection of 406 and Delacroix Road; Orleans Parish 8.6 State Highway 23 near Iota Street; Orleans Parish 5.0 On the Belle Chase Ferry; Orleans Parish
Xylene 1000 ppb 4.5 Near intersection of 406 and Delacroix Road; Orleans Parish 4.0 State Highway 23 near Iota Street; Orleans Parish 5.8 On the Belle Chase Ferry; Orleans Parish

Constituent ATSDR Sampling Event KAT091 Sampling Event KAT092
  24-h MRL (acute) ppbv Location ppbv Location
Benzene 50 ppb 4.9 Intersection of LA State Highway 39 and LA State Highway 3139; Orleans Parish 9.0 LA State Highway 23 near State Highway 406; Orleans Parish
Toluene 1000 ppb 5.4 Intersection of LA State Highway 39 and LA State Highway 3139; Orleans Parish 11.5 LA State Highway 23 near State Highway 406; Orleans Parish
Xylene 1000 ppb 4.2 Intersection of LA State Highway 39 and LA State Highway 3139; Orleans Parish 7.8 LA State Highway 23 near State Highway 406; Orleans Parish

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Mobile Monitoring (TAGA-2) Results for 10/6/05

Constituent ATSDR Sampling Event KAT077 Sampling Event KAT078 Sampling Event KAT079 Sampling Event KAT080
  24-h MRL (acute) ppbv Location ppbv Location ppbv Location ppbv Location
Benzene 50 ppb 6.6 Near Intersection of Loyola Avenue and Gravier Street - French Quarter 8.0 Intersection of St Claude Avenue and Clouet Street - French Quarter/Ninth Ward 3.2 Intersection of Saint Claude Street and Poland Avenue - Ninth Ward 4.4 Intersection of Almonaster Avenue and North Galvez Street -- Ninth Ward
Toluene 1000 ppb 9.4 Near Intersection of Loyola Avenue and Gravier Street - French Quarter 33.0 Intersection of St Claude Avenue and Clouet Street - French Quarter/Ninth Ward 3.2 Intersection of North Dorgenois Street and Mazant Street - Ninth Ward 11.0 Intersection of Almonaster Avenue and North Galvez Street -- Ninth Ward
Xylene 1000 ppb 5.4 Near Intersection of Loyola Avenue and Gravier Street - French Quarter 19.0 Intersection of St Claude Avenue and Clouet Street - French Quarter/Ninth Ward 0.6 Intersection of Saint Claude Street and Poland Avenue - Ninth Ward 8.3 Intersection of Almonaster Avenue and North Galvez Street -- Ninth Ward

Constituent ATSDR Sampling Event KAT081 Sampling Event KAT082 Sampling Event KAT083 Sampling Event KAT084
  24-h MRL (acute) ppbv Location ppbv Location ppbv Location ppbv Location
Benzene 50 ppb 10.5 Intersection of Canal and North Rampart - Business District 11.0 Intersection of Amelia Street and Saint Charles Avenue - Garden District 2.6 Intersection of Amelia and Magazine Street - Garden District 2.8 Intersection of East Avenue and Jefferson Avenue -- Garden District
Toluene 1000 ppb 31.0 Intersection of Canal and North Rampart - Business District 10.5 Intersection of Saint Charles Avenue and Lee Circle - Garden District 4.6 Intersection of Jackson Avenue and Magazine Street - Garden District 3.4 Intersection of East Avenue and Jefferson Avenue -- Garden District
Xylene 1000 ppb 26.0 Intersection of Canal and North Rampart - Business District 6.0 Intersection of Saint Charles Avenue and Lee Circle - Garden District 2.1 Intersection of State Street and Magazine Street - Garden District 1.3 Intersection of Tchoupitoulas Street and Napoleon Avenue -- Garden District

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Mobile Monitoring (TAGA-1) Results for 10/5/05

On October 5th, TAGA detected elevated levels of benzene in an industrial area along LA State Highway 18 in St. Charles Parish. In two locations, benzene levels exceeded the Agency for Toxic Substance and Disease Registry's (ATSDR) acute (24 hr), health guidance values. The Louisiana Department of Environmental Quality (LA DEQ) is conducting a follow-up investigation in the area.

Constituent ATSDR Sampling Event KAT066 Sampling Event KAT067 Sampling Event KAT068 Sampling Event KAT069
  24-h MRL (acute) ppbv Location ppbv Location ppbv Location ppbv Location
Benzene 50 ppb 115.0 Near Intersection of LA State Highway 3160 and LA State Highway 18 - St Charles Parish 4.4 Intersection of LA State Highway 18 and LA State Highway 3141 - St Charles Parish 165.0 Near 16251 LA State Highway 18 - St Charles Parish 5.0 Intersection of LA State Highway 18 and West 4th Street
Toluene 1000 ppb 14.5 Intersection of Rosedon Place and LA State Highway 18 - St Charles Parish 3.8 Intersection of LA State Highway 3141 and LA State Highway 3127 - St Charles Parish 10.5 Near 16251 LA State Highway 18 - St Charles Parish 4.5 Intersection of LA State Highway 18 and Duck Lane
Xylene 1000 ppb 11.0 Intersection of Rosedon Place and LA State Highway 18 - St Charles Parish 1.7 Intersection of LA State Highway 18 and LA State Highway 3141 - St Charles Parish 3.2 Near 16251 LA State Highway 18 - St Charles Parish 1.9 Intersection of LA State Highway 18 and Duck Lane

Constituent ATSDR Sampling Event KAT070 Sampling Event KAT071 Sampling Event KAT072 Sampling Event KAT073
  24-h MRL (acute) ppbv Location ppbv Location ppbv Location ppbv Location
Benzene 50 ppb 6.8 Stop under 3213 North on LA State Highway 3213 - St John the Baptist Parish 18.0 Intersection of LA State Highway 44 and West 6th Street - St John the Baptist Parish 41.0 Intersection of LA State Highway 44 and LA State Highway 3224 - St John the Baptist Parish 20.5 Intersection of LA State Highway 44 and US Highway 61
Toluene 1000 ppb 21.0 Stop under 3213 North on LA State Highway 3213 - St John the Baptist Parish 34.0 Intersection of LA State Highway 44 and West 6th Street - St John the Baptist Parish 53.0 Intersection of LA State Highway 44 and LA State Highway 3224 - St John the Baptist Parish 63.0 Intersection of US Highway 61 and Ormond Boulevard
Xylene 1000 ppb 13.5 Stop under 3213 North on LA State Highway 3213 - St John the Baptist Parish 27.0 Intersection of LA State Highway 44 and West 6th Street - St John the Baptist Parish 47.0 Intersection of LA State Highway 44 and LA State Highway 3224 - St John the Baptist Parish 59.0 Intersection of US Highway 61 and Ormond Boulevard

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Mobile Monitoring (TAGA-1) Results for 10/4/05

Constituent ATSDR Sampling Event KAT055 Sampling Event KAT056 Sampling Event KAT057 Sampling Event KAT058
  24-h MRL (acute) ppbv Location ppbv Location ppbv Location ppbv Location
Benzene 50 ppb 1.8 Background Sample at Louisiana Technical College 37.0 Intersection of Longview Drive and River Road (in front of gas station) 5.6 Intersection of Apple Street and River Road 7.8 State Route 3127 turning on to LA State Highway 628
Toluene 1000 ppb 3.2 Background Sample at Louisiana Technical College 53.0 Intersection of Longview Drive and River Road (in front of gas station) 7.4 Intersection of Apple Street and River Road 14.5 State Route 3127 turning on to LA State Highway 628
Xylene 1000 ppb 0.8 Background Sample at Louisiana Technical College 13.5 Intersection of Longview Drive and River Road (in front of gas station) 7.6 Intersection of Apple Street and River Road 13.0 State Route 3127 turning on to LA State Highway 628

Constituent ATSDR Sampling Event KAT059 Sampling Event KAT060 Sampling Event KAT061 Sampling Event KAT062
  24-h MRL (acute) ppbv Location ppbv Location ppbv Location ppbv Location
Benzene 50 ppb 9.2 Traffic Light near intersection of LA State Highway 48 and US Highway 61 33.0 In front of Shell Refinery on Highway 61 3.3 Intersection of Barton Avenue and LA State Highway 18 8.0 Intersection of River Road and LA State Highway 18
Toluene 1000 ppb 10.5 Traffic Light near intersection of LA State Highway 48 and US Highway 61 11.5 In front of Shell Refinery on Highway 61 7.0 Intersection of Barton Avenue and LA State Highway 18 10.5 Intersection of River Road and LA State Highway 18
Xylene 1000 ppb 5.2 Parking Lot near intersection of LA State Highway 48 and US Highway 61 4.7 Intersection of Ormond Boulevard and US Highway 61 4.3 Intersection of Barton Avenue and LA State Highway 18 6.2 Intersection of River Road and LA State Highway 18

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Mobile Monitoring (TAGA-1) Results for 10/3/05

Constituent ATSDR Sampling Event KAT047 Sampling Event KAT048 Sampling Event KAT049 Sampling Event KAT050
  24-h MRL (acute) ppbv Location ppbv Location ppbv Location ppbv Location
Benzene 50 ppb 2.9 Background Sample at Louisiana Technical College 7.0 South West entrance of NASA on Gentilly Road 3.2 Intersection of Industrial Parkway and US Highway 90 1.5 NASA Gate 6B
Toluene 1000 ppb 5.0 Background Sample at Louisiana Technical College 660.0 Air Products Gate 4 turning onto Industrial Parkway 115.0 Intersection of Industrial Parkway and Intercosal Drive 3.0 NASA Gate 6B
Xylene 1000 ppb 1.3 Background Sample at Louisiana Technical College 12.5 Air Products Gate 4 turning onto Industrial Parkway 10.5 Intersection of Industrial Parkway and US Highway 90 0.4 NASA Gate 6B

Constituent ATSDR Sampling Event KAT051 Sampling Event KAT052
  24-h MRL (acute) ppbv Location ppbv Location
Benzene 50 ppb 3.6 Intersection of Almonaster Avenue and Jourdan Avenue 2.8 Jourdan Avenue near Hayne Boulevard
Toluene 1000 ppb 7.5 Intersection of Almonaster Avenue and Jourdan Avenue 10.0 Jourdan Avenue near Hayne Boulevard
Xylene 1000 ppb 0.9 Intersection of Almonaster Avenue and Jourdan Avenue 2.2 Jourdan Avenue passing under State Route 10

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Mobile Monitoring (TAGA-1) Results for 10/2/05

On October 2, confirmation sampling of the cleanup response to Murphy Oil (St. Bernard Parish) resulted in the detection of low levels of volatile pollutants that were below the ATSDR health standards of concern.

Constituent ATSDR Sampling Event KAT038 Sampling Event KAT039 Sampling Event KAT040 Sampling Event KAT041
  24-h MRL (acute) ppbv Location ppbv Location ppbv Location ppbv Location
Benzene 50 ppb 3.6 Background Sample at Louisiana Technical College 4.4 Intersection of Mary Ann Drive and Highway 46 8.9 Intersection of Legend Drive and Highway 39 5.7 Intersection of Munster Blvd and Highway 39
Toluene 1000 ppb 5.0 Background Sample at Louisiana Technical College 8.0 Intersection of 13th Street and Highway 46 18.5 Intersection of Munster Blvd and Highway 39 9.0 Intersection of Jacob Drive & Highway 46
Xylene 1000 ppb 1.0 Background Sample at Louisiana Technical College 2.1 Intersection of Paris and Highway 46 1.7 Intersection of Legend Drive and Highway 39 7.4 Intersection of Jacob Drive & Highway 46

Constituent ATSDR Sampling Event KAT043 Sampling Event KAT044
  24-h MRL (acute) ppbv Location ppbv Location
Benzene 50 ppb 6.0 Intersection of Jacob Drive and East Judge Perez 3.8 Passing Solidelle and turning left onto Highway 39
Toluene 1000 ppb 14.5 Intersection of Jacob Drive and East Judge Perez 10.5 Intersection of Paul Drive and Highway 39
Xylene 1000 ppb 16.5 Intersection of Highway 46 and Jacob Drive 2.0 Intersection of Paris and Law

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Mobile Monitoring (TAGA-1) Results for 9/18/05

Constituent ATSDR Sampling Event NOL064 Sampling Event NOL065 Sampling Event NOL066 Sampling Event NOL067
  24-h MRL (acute) ppbv Location ppbv Location ppbv Location ppbv Location
Benzene 50 ppb 7.0 Intersection of Arch Bishop Hannan and Route 46 4.5 Bolbe Drive turning left onto Migistrate Street 2.8 Intersection of Rosetta and Highway 46 1.6 Intersection of Paris Road and Highway 39
Toluene 1000 ppb 28.0 Intersection of East Saint Bernard Highway and Walkers Lane 12.5 Bolbe Drive turning left onto Migistrate Street 49.0 Laplace Street before turning left onto East Prosper Street, passed a machine shop at approximately Laplace Street and Girod 9.0 On Paris Road crossing Highway 39 before turning right onto Highway 39
Xylene 1000 ppb 27.0 Intersection of East Saint Bernard Highway andWalkers Lane 12.0 Bolbe Drive turning left onto Migistrate Street 13.5 Intersection of Rosetta and Highway 46 1.2 Intersection of Paris Road and Highway 39

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Mobile Monitoring (TAGA-1) Results for 9/17/05

Constituent ATSDR Sampling Event NOL055 Sampling Event NOL056 Sampling Event NOL057 Sampling Event NOL058
  24-h MRL (acute) ppbv Location ppbv Location ppbv Location ppbv Location
Benzene 50 ppb 2.5 Stationary monitoring at Louisiana Technical College 7.8 Tullis Drive turning left onto Woodland Drive 8.6 Tall Timbers Drive before Silver Maple Court 4.2 MacArthur Boulevard turning left onto Eaton Street
Toluene 1000 ppb 11.5 Stationary monitoring at Louisiana Technical College 21.0 Tullis Drive turning left onto Woodland Drive 15.5 Silver Maple Court bearing right onto Tall Timbers Drive 14.0 Berkley Drive turning Right onto Kabel Drive
Xylene 1000 ppb 1.2 Stationary monitoring at Louisiana Technical College 14.0 Tullis Drive turning left onto Woodland Drive 11.5 Tall Timbers Drive before Silver Maple Court 8.6 Berkley Drive turning Right onto Kabel Drive

Constituent ATSDR Sampling Event NOL059 Sampling Event NOL060 Sampling Event NOL061
  24-h MRL (acute) ppbv Location ppbv Location ppbv Location
Benzene 50 ppb 4.7 Saint Nick Drive turning right onto General Meyer Avenue 4.7 End of Sullen Place, bearing left before Joycelyn Drive 4.0 End of Tedlar Bag Sampling
Toluene 1000 ppb 18.0 Saint Nick Drive turning right onto General Meyer Avenue 19.5 Fields Street before Medlock Street 26.0 General Meyer Avenue turning right onto Lancaster Street
Xylene 1000 ppb 4.2 Saint Nick Drive turning right onto General Meyer Avenue 6.0 Joycelyn Drive before turning left onto Fields Street 13.5 General Meyer Avenue turning right onto Lancaster Street

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Mobile Monitoring (TAGA-1) Results for 9/16/05

Constituent ATSDR Sampling Event NOL047 Sampling Event NOL048 Sampling Event NOL049 Sampling Event NOL050
  24-h MRL (acute) ppbv Location ppbv Location ppbv Location ppbv Location
Benzene 50 ppb 2.3 Louisiana Technical College (background) 3.5 L.B. Landry by Thayer 3.4 Newton Intersection turning right onto Nunez 2.7 Intersection of Shriley and Lawrence Streets
Toluene 1000 ppb 5.0 Louisiana Technical College (background) 15.0 L.B.Landry by Newton 17.0 Starting run on Opelousas Avenue 15.0 Intersection of Shirley passing Socrates
Xylene 1000 ppb 1.7 Louisiana Technical College (background) 2.5 L.B. Landry by Evelina 1.3 Opelousas Avenue Intersection turning right onto Newton 2.4 Intersection of Behrman turning right onto General Meyer Avenue

Constituent ATSDR Sampling Event NOL051 Sampling Event NOL052
  24-h MRL (acute) ppbv Location ppbv Location
Benzene 50 ppb 15.0 Wall Boulevard before turning left onto Pace Boulevard 4.7 Holiday Drive passing Fiesta
Toluene 1000 ppb 25.0 Wall Boulevard before turning left onto Pace Boulevard 23.0 Garden Oaks Drive before the intersection of Behrman Highway
Xylene 1000 ppb 6.2 Wall Boulevard before turning left onto Pace Boulevard 3.3 Holiday Drive passing Fiesta

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Mobile Monitoring (TAGA-1) Results for 9/15/05

Constituent ATSDR Sampling Event NOL038 Sampling Event NOL039 Sampling Event NOL040 Sampling Event NOL041
  24-h MRL (acute) ppbv Location ppbv Location ppbv Location ppbv Location
Benzene 50 ppb 2.7 Louisiana Technical College (background) 2.3 Intersection of West Bank Expressway and General DeGaulle 4.8 Intersection of General Meyer Avenue and Merrill 2.7 Intersection of General Meyer Avenue and Blair
Toluene 1000 ppb 13.0 Louisiana Technical College (background) 17.0 Intersection of Opelousas Avenue and Hendee 11.0 Intersection of Richard Road and Socrates 19.0 Intersection of General Meyer Avenue and Blair
Xylene 1000 ppb 1.4 Louisiana Technical College (background) 3.3 Intersection of West Bank Expressway and General DeGaulle 6.2 Intersection of General Meyer Avenue and Merrill 7.4 Intersection of Nolan and Bennett

Constituent ATSDR Sampling Event NOL042 Sampling Event NOL043 Sampling Event NOL044
  24-h MRL (acute) ppbv Location ppbv Location ppbv Location
Benzene 50 ppb 15.3 Intersection of Tullis and Woodland near Cypress Grove Court 2.9 Intersection of General DeGaulle (LA 428) and L.B. Landry Avenue 2.2 Intersection of Newton Street and Verret
Toluene 1000 ppb 62.0 Intersection of Tullis and Woodland near Cypress Grove Court 15.1 Holmes Boulevard near Bruce Avenue 9.0 Intersection of Newton Street and Verret
Xylene 1000 ppb 54.0 Intersection of Tullis and Woodland near Cypress Grove Court 9.0 Terry Parkway passing under Route 90 overpass 3.7 Highway 90 Exit and General DeGaulle Drive

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Mobile Monitoring (TAGA-2) Results for 9/15/05

Constituent ATSDR Sampling Event KAT024 Sampling Event KAT025 Sampling Event KAT026 Sampling Event KAT027
  24-h MRL (acute) ppbv Location ppbv Location ppbv Location ppbv Location
Benzene 50 ppb 6.0 Louisiana Technical College (background) 18.0 Intersection of Cleveland Street and South Johnson Street 8.2 Intersection of LaSalle Street and Tulane Avenue, heading northeast on Tulane Avenue 8.0 Intersection of Crozat Street and Iberville Street
Toluene 1000 ppb 7.7 Louisiana Technical College (background) 92.0 Intersection of Cleveland Street and South Johnson Street 3.0 Intersection of Poydras Street and South Johnson Street 12.8 Intersection of Iberville Street and Canal Street
Xylene 1000 ppb 2.3 Louisiana Technical College (background) 47.0 Intersection of Cleveland Street and South Johnson Street 3.8 Intersection of North Roman Street and North Galvez Street 4.4 Intersection of South Galvez Street and Tulane Avenue

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Mobile Monitoring (TAGA-1) Results for 9/14/05

Constituent ATSDR Sampling Event NOL030 Sampling Event NOL031 Sampling Event NOL032 Sampling Event NOLO033 Sampling Event NOL034 Sampling Event NOL035
  24-h MRL (acute) ppbv Location ppbv Location ppbv Location ppbv Location ppbv Location ppbv Location
Benzene 50 ppb 4.2 Intersection of Clerview and Jefferson HighwayEast 2.8 Intersection of Garfield and Nashville Avenue 2.4 Intersection of Louisianina Avenue and Laurel 2.0 Intersection of Tchoupitoulas and Orange 3.5 Intersection of Tchoupitoulas and Poydras 3.4 Canal Street
Toluene 1000 ppb 16.0 Intersection of Tchoupitoulas Road and Nashville Avenue 12.0 Intersection of Magazine and Nashville Avenue 26.0 Intersection of Louisianina Avenue and Magazine 19.0 Intersection of Tchoupitoulas and Washington Avenue 29.0 Intersection of Carondelet and Poydras 17.0 Canal Street heading back to Louisiana Technical College
Xylene 1000 ppb 9.8 Clearview just before Jefferson Highway East 3.7 Napolion Avenue just past Chestnut 5.2 Intersection of Louisianina Avenue and Laurel 1.2 Intersection of Tchoupitoulas and Orange 5.6 Intersection of Carondelet and Poydras 11.0 Canal Street

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Mobile Monitoring (TAGA-2) Results for 9/14/05

Constituent ATSDR Sampling Event KAT018 Sampling Event KAT019 Sampling Event KAT020 Sampling Event KAT021
  24-h MRL (acute) ppbv Location ppbv Location ppbv Location ppbv Location
Benzene 50 ppb 8.0 Intersection of River Road and Huey P. Long Bridge 11.0 Barataria Boulevard between Jessie Street and Route 18 8.5 Intersection of Weidman Street and Monroe Street 14.0 Intersection of North Rampart and Canal Street
Toluene 1000 ppb 13.0 Intersection of 4th Street and Avenue B 26.0 Barataria Boulevard between Jessie Street and Route 18 14.5 Intersection of Weidman Street and Monroe Street 68.0 Intersection of North Rampart and Canal Street
Xylene 1000 ppb 5.8 Intersection of 2nd Street and Avenue B 16.0 Barataria Boulevard between Jessie Street and Route 18 7.8 Intersection of Gov. Hall Street and Ocean Avenue 27.0 Intersection of North Rampart and Canal Street

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Mobile Monitoring (TAGA-1) Results for 9/13/05

Constituent ATSDR Sampling Event NOL020 Sampling Event NOL021 Sampling Event NOL022 Sampling Event NOL023
  24-h MRL (acute) ppbv Location ppbv Location ppbv Location ppbv Location
Benzene 50 ppb 2.8 Intersection of Clearview Avenue and Mounes Street 4.6 Bus Depot 2.6 Route 10 just prior to Route 90 East Ramp 1.5 Chef Menteur Boulevard turning right onto Old Gentilly Road
Toluene 1000 ppb 10.9 Intersection of Clearview Avenue and South Carrolton Avenue 18.5 Bus Depot 11.5 Ramp off Route 10 to Route 90 East 11.0 Old Gentilly Road turning right onto Route 90
Xylene 1000 ppb 4.4 Jefferson Highway Route 90 14.5 Bus Depot 3.1 Route 10 just prior to Route 90 East Ramp 1.2 Chef Menteur Boulevard turning right onto Old Gentilly Road

Constituent ATSDR Sampling Event NOL024 Sampling Event NOL025 Sampling Event NOL026 Sampling Event NOL027
  24-h MRL (acute) ppbv Location ppbv Location ppbv Location ppbv Location
Benzene 50 ppb 5.1 Route 47 South 2.5 Route 47 South 170.0 Murphy Oil Refinery (Judge Perez and Jacob) 6.2 Crossing Saint Peters and North Rampart and taking left onto Canal Street
Toluene 1000 ppb 13.5 Route 47 South 11.5 Turning from Walker onto Judge Perez Road 790.0 Murphy Oil Refinery (Judge Perez and Jacob) 12.5 Saint Charles Avenue bearing right to Leake Avenue
Xylene 1000 ppb 9.1 Route 47 South 18.0 Route 47 South ner intersection of Paris Road 660.0 Murphy Oil Refinery (Judge Perez and Jacob) 17.5 Crossing Saint Peters and North Rampart and taking left onto Canal Street

Benzene exeeded the acute (short-term - measured in days) at one location behind Murphy Oil on Judge Perez Drive. The data below is a summary of the highest quantified concentrations detected over a 40-45 minute trip in the TAGA.

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Mobile Monitoring (TAGA-2) Results for 9/13/05

Constituent ATSDR Sampling Event KAT011 Sampling Event KAT012 Sampling Event KAT013
  24-h MRL (acute) ppbv Location ppbv Location ppbv Location
Benzene 50 ppb 8.5 Oak Lawn and Veterans Boulevard 11.0 Glennwood Drive and Fairmont Drive 21.0 Avenue A and Hector
Toluene 1000 ppb 17.0 Oak Lawn and Veterans Boulevard 16.0 Derbigny Stre and Estes Street 22.0 Avenue A and Hector
Xylene 1000 ppb 3.6 Oak Lawn and Veterans Boulevard 7.4 Derbigny Stre and Estes Street 11.5 Mulberry Drive and Metaire Road

Constituent ATSDR Sampling Event KAT014 Sampling Event KAT015
  24-h MRL (acute) ppbv Location ppbv Location
Benzene 50 ppb 16.5 Duplessis Street and Park Street 9.0 East Maple Ridge Drive and Maple Ridge Oak
Toluene 1000 ppb 17.0 Ogden and Pontchartain Boulevard 27.0 Maple Ridge Oak and Oleander Street
Xylene 1000 ppb 8.2 Duplessis Street and Park Street 1.2 Atherton Drive and Colapissa Street

No measured data exceeded ATSDR 24-hour acute benchmarks. The data below is a summary of the highest quantified concentrations detected over a 40-45 minute trip in the TAGA.

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Mobile Monitoring (TAGA) Results for 9/12/05

Constituent ATSDR Sampling Event NOL012 Sampling Event NOL013 Sampling Event NOL014
  24-h MRL (acute) ppbv Location ppbv Location ppbv Location
Benzene 50 ppb 4.5 At the gate of Louisiana Technical College turning onto Airheart ND Crossing Drawbridge after intersection of LA46 and Bartholamew 88.0 Murphy Oil Refinery (Judge Perez and Jacob)
Toluene 1000 ppb 82.0 Airheart crossing Mississippi River ND Crossing Drawbridge after intersection of LA46 and Bartholamew 550.0 Murphy Oil Refinery (Judge Perez and Jacob)
Xylene 1000 ppb 15.0 Airheart crossing Huey Long Bridge 6.0 Crossing Drawbridge after intersection of LA46 and Bartholamew 660.0 Murphy Oil Refinery (Judge Perez and Jacob)

Constituent ATSDR Sampling Event NOL015 Sampling Event NOL016 Sampling Event NOL017
  24-h MRL (acute) ppbv Location ppbv Location ppbv Location
Benzene 50 ppb 127.0 Murphy Oil Refinery (U-Turn on Judge Perez) 96.0 Murphy Oil Refinery (start of midpoint of plume) 9.8 Convention Center Drive
Toluene 1000 ppb 800.0 Murphy Oil Refinery (U-Turn on Judge Perez) 720.0 Murphy Oil Refinery (start of midpoint of plume) 17.4 Convention Center Drive
Xylene 1000 ppb 1100.0 Murphy Oil Refinery (U-Turn on Judge Perez) 1000.0 Murphy Oil Refinery (start of midpoint of plume) 9.0 Convention Center Drive

Benzene and Xylene exeeded both the acute (short-term - measured in days) screening levels. The data below is a summary of the highest quantified concentrations detected over a 40-45 minute trip in the TAGA. The data results above are from the area around Murphy Oil and the associated oil spill.

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