Document Separator DSO00 Document ID Number 38970
Page 1 of I Aimee Zack From: Sent: To: Cc: Subject: Nichols, Andrew (MPCA) [Andrew.Nichols@state,mn.us] Thursday, July 01, 2010 2:50 PM jevondracek@ashland,com; LeeAnn Thomas; steve_finn@golder,com; shelgen@geomega,com ; Shoreham Area Advisory Committee Jolley, Rick (MPCA); Villas-Horns, Cathy (MDA); Messing, Rita (MDH); Pena, Daniel (MDH); Anderson, Robert (MDA) Final Letter Health Consultation for 1-3-butadiene along Central Avenue Attachments: Final Letter Health Consultation 1-3-butadiene,pdf Ladies and Gentlemen, Attached, please find the version of the Minnesota Department of Health (MDH) Health Consultation that was recently sent to the U.S. Department of Health and Human Services Agency for Toxic Substances and Disease Registry (ATSDR). Please feel free to contact us if you have any questions. Regards, Andrew Andrew Nichols Project Manager Voluntary Investigation & Cleanup Program Minnesota Pollution Control Agency 520 Lafayette Road St, Paul, MN 55155 (651) 757-2612 (651) 296-9707 (Fax) ~ d r~w,)3 i~ h ~1~@ ~t~ te,.i :n n. u s MPCA VIC Web Site: ~_tt_p:llwww.pca.state.mn.uslcleanuplvic.html 7/3 0/2 010
Letter Health Consultation 1, 3-Butadiene Concentrations Along Central Avenue In Northeast Minneapolis Prepared by the Minnesota Department of Health June 2010 Prepared under a Cooperative Agreement with the U.S. DEPARTMENT OF HEALTH A HUMAN SERVICES Agency for Toxic Substances and Disease Registry Division of Health Assessment and Consultation Atlanta, Georgia 30333
Health Consultation: A Note of Explanation A health consultation is a verbal or written response from ATSDR or one of ATSDR s Cooperative Agreement Partners (in this case the Minnesota Department of Health; MDH) to a specific request for information about health risks related to a specific site, a chemical release, or the presence of hazardous material. In order to prevent or mitigate exposures, a consultation may lead to specific actions, such as restricting use of or replacing water supplies; intensifying environmental sampling; restricting site access; or removing the contaminated material. In addition, consultations may recommend additional public health actions, such as conducting health surveillance activities to evaluate exposure or trends in adverse health outcomes; conducting biological indicators of exposure studies to assess exposure; and providing health education for hea~th care providers and community members. This document conc~uc~es the hea~th consultation process for this site, unless additional information is obtained by ATSDR or MDH which, in the Agency s opinion, indicates a need to revise or append the conclusions previously issued./fyou have questions or comments about this report, we encourage you to contact us. Please write to. Community Relations Coordinator Site Assessment and Consultation Unit Minnesota Department of Health 625 North Robert Street PO Box 64975 St. Paul, MN 55164-0975 OR call us at." On the web." (651) 201-4897 orl-800-657-3908 (toll free call - press "4" on your touch tone phone) http://www.health.state.mn.usldivslehlhazardous/index.html You May Contact ATSDR Toll Free at 1-800-CDC-INFO or Visit our Home Page at: http://www.atsd r.cdc.gov
DEPARTMEHToFHEALTH May 26, 2010 Rick Jolley Hydrogeologist Voluntary Investigation and Cleanup Unit VIC and Emergency Response Section Remediation Division Minnesota Pollution Control Agency Dear Mr. Jolley: The Minnesota Department of Health (MDH) reviewed the analytical data you provided from the 1, 3-butadiene soil vapor investigation in the city of Minneapolis on the east side of Central Avenue at the 2900 block across from the Former Ashland Lease Area (FALA) in the Soo Line Shoreham Yard site (VIC Site 5080). MDH has concluded that the 1, 3-butadiene soil vapor concentrations are not a current health concern. The MPCA 1, 3-butadiene residential Intrusion Screening Value (ISV) for 1, 3-butadiene is 0.3 micrograms per cubic meter (pg/m3)(3). This value is equal to the MDH Health Based Value (HBV) for 1,3-butadiene (a known carcinogen). The HBV is a criterion that MDH uses to evaluate exposures to the general public. For carcinogens, the HBV is unlikely to cause an incremental cancer risk greater than 1 additional case in 100,000 people exposed for a lifetime. If soil vapor concentrations are not consistently or significantly greater than 10 times the ISV (3.0 pg/m 3) the vapors are not considered by MDH to be a possible health concern because air concentrations are likely much lower than soil vapor concentrations. In other words, the soil vapor gas concentration must be consistently greater than 10 times the ISV (10X-ISV) before a potential threat to indoor air is evaluated. Table 1 lists the 1, 3-butadiene soil concentrations, end Figure 1 illustrates the sample locations. Possible Sources of 1, 3-butadiene There are numerous potential 1,3-butadiene sources in an urban environment including, but not limited to: o Vehicle exhaust o Burning of rubber and plastic o Tobacco smoke o Petroleum releases o Wood burning o Manufacturing release A gas station is located on the north end of the site and several businesses on the south side appear to service vehicles. Central Avenue, on the east side of the site, is a major traffic route that
includes public bus transportation. Automobile exhaust is a constant source of 1, 3-butadiene release to the atmosphere. 1, 3-Butadiene was measured in the exhaust of typical automobiles and light trucks using both winter and summer gasoline formulations and accounted for up to 0.12% of total hydrocarbon emissions (1). The average amount of 1, 3-butadiena in the air is between 0.4 to 1 part of 1, 3-butadiene per billion parts of air (ppb) in cities and suburban areas (~). 1,3-Butadiene is highly volatile; therefore, it partitions predominantly to the atmosphere. In the atmosphere, 1,3-butadiene undergoes rapid destruction, primarily by photochemical reactions. The reaction with photochemically produced hydroxyl radicals has a calculated half-life of approximately 6 hours and is the dominant pathway for atmospheric removal (1). Although 1, 3- butadiene undergoes rapid photo-oxidation in the atmosphere, it is almost always present at low concentrations in urban and suburban areas. Petroleum Contaminants in Samples The following petroleum chemical constituents were also indentified in the 2007-8 soil vapor samples: o Ethanol o Ethyl-benzene o Benzene o Xylenes (total) o Toluene Tables 2 and 3 list the petroleum contaminant concentrations identified in soil gas as part of the vapor intrusion investigation east of Central Avenue. None of the petroleum contaminant concentrations exceeded their respective 10 times the Intrusion Screening Value (10X-ISVs) and therefore are not likely to be an indoor health risk. Petroleum constituent concentrations were not reported in the fall 2009 sampling event. Chlorinated Solvents in Samples Soil gas sampling was conducted in 2007 along Central Avenue on the west side of the commercial buildings. Follow-up sampling conducted in 2008 was expanded to the east to include the alley. Chlorinated solvent compounds that exceeded their soil gas screening values in 2007 included trichloroethene (TCE) and tetrachloroethene (PCE). The suspected source for the chlorinated solvent concentrations in soil gas is the adjacent voluntary investigation and cleanup (VIC) Site 5080. The samples in 2008 confirmed that the chlorinated solvents were not detected in soil gas on the east side of the commercial buildings in the alley and that TCE was still detected above its soil gas screening value but at lower concentrations than in 2007. PCE was no longer a compound of concern. The following Chlorinated Solvents were indentified in the 2007-8 soil vapor samples: o 1,1,1-trichloroethane o Tetrachloroethene (PCE) o Trichloroethene (TCE) o 1,3- dichlorobenzene Tables 4, 5, and 6 list the chlorinated solvent concentrations identified at the site. The TCE residential ISV screening value of 30 pg/m3 (10X-iSV) was exceeded in samples VP07-3, VP07-4, VP07-5, VP08-12, VP09-01, and VP09-02. The 2009 sample event included two soil gas
samples. Samples VP09-01 and VP09-02 had TCE concentrations of 30 and 220 IJg/m3 respectively (see Figure 1 for sample locations). Because, the land use along Central Avenue is commercial/industrial results were also compared to commercial/industrial ISVs. The TCE commercial/industrial ISV is 8 IJg/m 3. If the TCE soil vapor concentrations range between 80 and 800 pg/m3 (10x-ISV and 100x-ISV respectively), additional monitoring is warranted. The 2 soil vapor samples collected in 2009 do not sufficiently characterize the southern part of the plume where TCE and PCE concentrations were elevated in 2008 (see Table 5, samples VP08-10, and VP08-12). Conclusions It appears that a mixed plume of petroleum and chlorinated solvents is present in the study area. There are a number of potential sources for these contaminants along Central Avenue. Low levels of 1,3-butadiene, petroleum contaminants, and chlorinated solvents were found in soil vapor samples in the study area. Levels of 1,3-butadiene, petroleum contaminants, and chlorinated solvents are not expected to add significantly to urban background levels in ambient air. The current soil vapor contaminant concentrations are not expected to harm people s health. However, some detections of TCE above residential and commercial/industrial screening values were noted. Recommendations Additional soil vapor gas monitoring for chlorinated solvents and petroleum constituents is recommended along Central Avenue east of the FALA extraction system. The following contaminants should be included: o Ethano~ o Ethyl-benzene o Tetrachloroethene o Benzene o Xylenes (total) o Trichloroethene (TCE) Toluene o 1,3-butadiene o 1,1,1-trichloroethane MDH will assist the MPCA in communicating these findings to the public as needed. Daniel PeSa, M.S. Environmental Research Scientist Minnesota Department of Health Site Assessment & Consultation Unit 651-215-4920 phone 651-215-4606 fax daniel.pena@state.mn.us
Table 1 1, 3-Butadiene In North Side Samples 1,3-Butadiene VP08-02 VP08-03 1,3-Butadiene (pg/m3 I VP08-01 VP-08-04 VP07-01 VP07-02 12 VP09-03 VP-08-05 8.1 4.9 1, 3-Butadiene In South Side Samples VP08-12 VP09-01 VP07-03 VP09-02 VP07-04 VP08-11 VP08-11 D VP07-05 VP07-06 VP07-06 D 1,3-Butadiene Ip~l/m 2.3 NO 4.8 2.2 2.4. :3.8 3.1 VP09-04 VP09-04 D VP08-06 VP09-05 VP08-07 VP09-06 VP08-08 1,3-Butadiene Ipfl/m3) "1.7 4.5 2.1 4.2 2.3 VP08-10 4,4 VP08-09 4.5 VP07 = Sampled in 2007; VP08 = Sampled in 2008; VP09 = Sampled in 2009 D = Duplicate Sample; = Not Detected Bold: > 10x 1,3-Butadiene Residential Intrusion Screening Value (0.3pg/m 3)
Table 2 2007 Petroleum Constituents Samples Petroleum Compounds Petroleum Compounds (t~ 1/m3) qj 1/m3) Ethanol 10 Benzene 19 VP07-01 Toluene 160 Not sampled Ethyl-benzene 30 Xylenes (total) 156 Volatile Petroleum Chemicals In South Side Samples Petroleum Compounds (~g/m3) VP07-02 Ethanol Benzene Toluene Ethyl-benzene Xylenes (total) NO Not sampled Petroleum Compounds (H~l/m3) VP07-03 VP07-04 VP07-05 VP07-06 Ethanol 7.7 Benzene 12 Toluene 110 Ethyl-benzene 20 Xylenes (total) 109 Ethanol Benzene 12 Toluene Ethyl-benzene 110 19 Xylenes (total) 97 Ethanol 15 Benzene 14 Toluene 120 Ethyl-benzene 103 Xylenes(total) 215 Ethanol 7.5 Benzene 8.4 Toluene 34 Ethyl-benzene 15 Xylenes (total) 34 Not sampled Not sampled Not sampled Not sampled 10x Intrusion Screening Values (#g/m 3) Ethanol= 150,000; Benzene= 45; Toluene= 50,000; Ethy-benzene= 10,000; Xylenes= 1000 VP07 = Sampled in 2007; = Not Detected; Xylenes (total)= m,p, and o-xylene
Table 3 VP08-02 VP08-01 Central VP08-12 VP08-11 VP08-10 2008 Petroleum Constituents Samples North Side Samples Petroleum Compounds (t~l/ma) Ethanol 720 Benzene Toluene 70 Ethyl-benzene 33 Xylenes (total) 152 Ethanol 1000 Benzene Toluene 71 Ethyl-benzene 26 Xylenes (total) 122 VP08-03 VP-08-04 VP-08-05 South Side Samples Ave Samples Petroleum Compounds Ethanol Benzene Toluene Ethyl-benzene Xylenes (total) Ethanol Benzene Toluene Ethyl-benzene Xylenes (total) Ethanol Benzene Toluene Ethyl-benzene Xylenes (total) 110 4.3 61 5O 226 92 3.8 51 38 171 760 8.2 120 64 276 Alley VP08-06 VP08-07 VP08-08 VP08-09 Petroleum Compounds (p,~/m3) Ethanol 2000 Benzene 17 Toluene 190 Ethyl-benzene 52 Xylenes (total) 207 Ethanol 1200 Benzene 7.9 Toluene 140 Ethyl-benzene 44 X~,lenes {total) 183 Ethanol 1000 Benzene 8.3 Toluene 120 Ethyl-benzene 45 Xy~enes~tota~) 170 Xylenas (total) 206 Ethanol 650 Benzene 7.5 Toluene 120 Ethyl-benzene 54 Xylenes (total) 28 Ethanol 1200 Benzene Toluene 120 Ethyl-benzene 28 Xylanea (total) 81 Ethanol 1000 Benzene 8.4 Toluene 150 Ethyl-benzene 55 X~/lenas (total / 215 10x Intrusion Screening Values (pg/m 3) Ethanol= 150,000; Benzene= 45; Toluene= 50,000; Ethy-benzene= 10,000; Xylenes= 1000 VP07 = Sampled in 2007; VP08 = Sampled in 2008; VP09 = Sampled in 2009 D = Duplicate Sample ; Xylenes (total)= m,p, and o-xylene; = Not Detected Samples Petroleum Compounds /pp/m~) Ethanol 840 Benzene 7.9 Toluene 120 Ethyl-benzene 48
Table 4 2007 Chlorinated Solvents Samples North Side Samples Petroleum Compounds (IJ~/m3) Petroleum Compounds VP07-01 1,1,1-trichloroethane 13 Trichloroethene (TCE) 7.8 Tetrachloroethene 8.7 Not sampled 1,3- dichlorobenzene Volatile Petroleum Chemicals In South Side Samples Petroleum Compounds Petroleum Compounds Sample- (pg/m 3) Location (pg/m3) 1,1,1-trichloroethane VP07-02 Trichloroethene (TCE) Tetrachloroethene Not sampled 1, 3- dichlorobenzene VP07-03 1,1,1-trichloroethane 65 Td(::hloroethefle (TCE) 510 Tetrachloroethene 44 Not sampled 1, 3- dichlorobenzene 1,1,1-trichloroethane 32 Tdchloroethene (TCE) 45 VP07-04 Tetrachloroethene 28 Not sampled 1,3- dichlorobenzene 1,1,1-trichloreethane 22 Tdchloroethene ( I"CE) 72 VP07-05 Tetrachloroethene 71 Not sampled 1, 3- dichlorobenzene 1,1,1-trichloroethane 5.2 Trichloroethene (TCE) 5.5 Net VP07-06 Tetrachloroethene 8.9 sampled 1, 3- dichlorobenzene 10x Residential Intrusion Screening Values (pg/m 3) 1,1,1-trichloroethane = 50,000; Trichloroethene (TCE) = 30; Tetrachloroethene = 200; 1~ 3- dichlorobenzene = not available VP07 = Sampled in 2007; = Not Sampled ; Xylenes (total) = m,p, and o-xylene Bold: >10x Residential Intrusion Screening Value
Table 5 2008 Soil Chlorinated Solvents Vapor Samples North Side Compounds (IJg/m 3) Samples Sample- Location Compounds (I.Ig/m 3) VP08-02 1, 3- dichlorobenzene 16 VP08-03 1, 3- dichlorobenzene 14 Trichloroethene VP08-01 16 1, 3- dichlorobenzene 12 VP-08-04 N VP-08-05 South Side Samples Compounds Compounds (~Jg/m 3) Sample- (l~g/m3) Location VP08-12 1,1,1-trichloroethane 6.5 Tdchloroethene (TOE) 110 Tetrachloroethene 12 VP08-06 1, 3- dichlorobenzene 8 VP08-11 Trichloroethene 4.9 VP08-07 VPD8-10 Tetrachioroethene (PCE) 190 1,3- dichlorobenzene 11 VP08-08 VP08-10 D Tetrachloroethene 180 1,3- dichlorobenzene 9 VP08-09 1, 3-dichlorobenzene 13 10x Residential Intrusion Screening Values (pg/m 3) 1,1,1-trichloroethane = 50,000; Trichloroethene (TCE) = 30; Tetrachloroethene = 200; 1, 3- dichlorobenzene = not available /P08 = Sampled in 2008; = Not Detected; D= Duplicate 3old: >10x Residential Intrusion Screening Value Exceedance
Table 6 2009 Soil Chlorinated Solvents Vapor Samples Compounds VP09-01 VP09-02 North Side Samples Trichloroethene Tetrachloroethene Tdchloroethene Tetrachloroethene 1,1,1 -trichloroethane Compounds!l~g/m3) 30 6,6 Not Sampled 220 28 Not Sampled 15 10x Residential Intrusion Screening Values (~Jg/m 3) 1,1,1-trichloroethane = 50,000; Trichloroethene (TCE) = 30; Tetrachloroethene = 200 VP09 = Sampled in 2009; Bold: >10x Residential Intrusion Screening Value Exceedance
Figure 1 1.3-Butadiene (ug/m3) Results 2007-2009
References 1. Agency For Toxic Substances and Disease Registry, Toxicological Profile for 1,3-Butadiene. Draft for Public Comment Public Comment Period Ends on February 26, 2010. 2. Ashland Inc, 2008 Sampling Results and Screening Evaluation for Central Avenue East of the FALA, East Side Shoreham Yard (VIC Site 5080) Minneapolis, Minnesota, prepared by Geomega Inc. August 2008 3. Minnesota Pollution Control Agency, Risk-Based Guidance for the Vapor Intrusion Pathway (Superfund RCRA and Voluntary Cleanup Section), September 2008. 4. Ashland Inc, 2009 Sampling Results end Screening Evaluation for Central Avenue East of the FALA, East Side Shorehem Yard (VIC Site 5080) Minneapolis, Minnesota, prepared by Geomega Inc. July 2009