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Home My WebLink AboutDSHW-2024-006193Northrop Grumman Systems Corporation Propulsion Systems 9160 North Highway 83 Promontory, UT 84307 May 6, 2024 8200-CY24-05 Mr. Doug Hansen, Director Utah Department of Environmental Quality Division of Waste Management and Radiation Control 195 North 1950 West P.O. Box 144880 Salt Lake City, Utah 84114-4880 Re: SWMU 233 RCRA Facility Investigation Report Response Northrop Grumman Systems Corporation – Promontory Facility UTD009081357 Dear Mr. Hansen: The following is in response to a letter the Division of Waste Management and Radiation Control (the Division) sent to Northrop Grumman Systems Corporation (NGSC) dated April 5, 2024, concerning Solid Waste Management Unit (SWMU) 233 at NGSC’s Promontory Facility. The letter was given a Division file number of DSHW-2024-005542 SWMU 233. The Division wrote the following: 1.The SWMU 233 old burn ground was used for open burning of waste reactive materials consisting primarily of waste propellant, propellant contaminated waste, and potentially waste solvents at the ground surface. Therefore, the highest concentration of constituents related to the open burning activities is likely to be in the surface soils. The RFI Report says samples were collected at the two-foot below ground surface (bgs) and five-foot bgs depths at each location. The surface exposure pathway has not been evaluated. Additionally, most sample locations (eight out of ten) were selected from the center line of the burn trench. The remaining two sample locations were chosen at random. Sample locations at the center of the burn trench may potentially represent the worst-case scenario (and therefore the highest concentrations); however, the extent of lateral contamination has not been delineated. Please conduct additional sampling to characterize surface soil and to define the lateral extent of potential contamination. Response: NGSC will provide additional samples as recommended. NGSC will coordinate with the Division to locate these additional samples. DSHW-2024-006193 May 6, 2024 Mr. Doug Hansen, Director Utah Division of Waste Management and Radiation Control The Division wrote the following: 2. The RFI Report states that the soil sample analysis was performed by Thiokol’s environmental laboratory using Environmental Protection Agency (EPA)-approved methods but does not list the specific analytical methods used. Please include the analytical methods used to analyze the soil samples in the report. Response: See analytical data attached to this letter. The Division wrote the following: 3. The SWMU 233 RFI Report compares analytical data to EPA Preliminary Remediation Goals from 1999, EPA Proposed RCRA Corrective Action Levels from 1990, United States Geological Survey (USGS) Background concentrations of Elements in Soils from 1984, and EPA Soil Screening Levels dilution attenuation factor (DAF) 20 from 1997. The Division acknowledges that the SWMU 233 RFI Report was prepared years ago when these screening levels were current. Please note the following information applies to all current and future investigations: • Analytical data shall be compared to current applicable screening levels. • While the Division acknowledges that soil metals contamination concentrations were historically compared to USGS National Background Ranges, the comparison of soil metals contaminant concentrations to either site-specific or the default county-specific background threshold values for Utah should be conducted, in accordance with the Technical Guide for Risk Assessments: Utah Administrative Code R315-101 (TGRA). • It is appropriate to compare maximum contaminant concentrations to a background threshold value (BTV) (typically the 95% upper tolerance limit derived from the background dataset) or the default county-specific BTV. NGSC Response: All RCRA Facility Investigations (RFIs) to be submitted to the Division in the future will use the most current Regional Screening Levels (RSLs). The Division wrote the following: 4. The RFI Report states that xylene was the only constituent within the area of concern that exceeded the range found in Thiokol (ATK Promontory) background soil. While this appears to be true based on the scatterplots and boxplots provided in the report, the median concentration of xylene appears to be higher than the background xylene concentration. Xylene is also not a naturally occurring compound in the environment. Unless the xylene concentrations detected in the background soils can be attributed to something other than the activities conducted at the ATK Promontory facility, xylene should be retained as a contaminant of potential concern (COPC). Additionally, the cadmium concentrations in the interquartile range (25% to 75%) within SWMU 233 exceeds the concentrations in the background soil interquartile range – even though the highest concentrations were detected in the background soils. In fact, the two interquartile ranges do not overlap, which indicates that the cadmium concentrations in May 6, 2024 Mr. Doug Hansen, Director Utah Division of Waste Management and Radiation Control SWMU 233 may in fact differ from the background. A quantile-quantile plot may be useful for comparing the two distributions. Please note that any constituent concentrations that are site related must be retained as a COPC, unless they are representative of background. NGSC Response: As additional sampling at the site will occur and a report will accompany this additional sampling, xylene and cadmium comments above will be addressed in this report. The Division wrote the following: 5. The RFI Report states that the old burn ground was used for open burning of waste reactive materials consisting primarily of waste propellant and propellant contaminated waste and may also have included waste solvents. Based on this information, the constituents of concern have been identified as volatile organics, metals, HMX, and nitroglycerin. However, propellants are commonly mixed with perchlorate containing oxidizers to increase performance. The samples were not analyzed for perchlorate. Please include perchlorate analysis in the analytical suite or provide documentation to show that perchlorate was not treated at this unit. Page 3 of 3 Additionally, open burning of waste explosives and propellant may produce dioxins, furans, and polycyclic aromatic hydrocarbons (PAHs) – depending on the specific characteristics of the waste streams. The samples were not analyzed for these constituents. Please include dioxin/furan and PAH analysis in the analytical suite. NGSC Response: Perchlorate, dioxins, furans, and PAHs will be included in the additional sampling at SWMU 233. The Division wrote the following: 6. The RFI Report states that other organic constituents were reported in low parts-per-billion (ppb) concentrations (<10 grams per kilogram, g/kg) in at least one sample. All results were qualified as estimated as they were less than the reporting limit. Many of the results for these organic chemicals were also qualified as being detected in the laboratory blank. Based on this, the results were not considered to be positive results and were eliminated from further consideration. The data should be included in the RFI Report as qualified rather than simply eliminated from consideration. Please follow the 2018 Quality Assurance Project Plan (QAPP) regarding data evaluation for current investigations. NGSC Response: The report to be submitted to the Division with additional sampling and analysis will follow the 2018 QAPP. May 6, 2024 Mr. Doug Hansen, Director Utah Division of Waste Management and Radiation Control If you have questions, please contact me at (801) 251-2166. Sincerely, Kris H Blauer Manager, Environmental Services Northrop Grumman Systems Corporation Cc: Karen Wallner Paige Walton Frkiay, Nwernber01, 1996 CERTIFICATE OF ANALYSIS Listing of Sample Information and Testing Requested TESTED FOR Thiokol: DLV Environmental Monitoring M/S 301 Thiokol Corp,UT 84322 Frank Walker ANALYZED BY Thiokol Environmental Laboratory Thiokol Corporation P.O. Box 707 MIS 245 Brigham City, UT 84302-0707 801-863-5445 800-863-8080 Project Solid Waste MWnt Invest. Login Number L544 Lab Number Client Number Received Collect Date/Time Test Requested Desciiption Matrix 1544-1 #233, GD221 2FT. E. OF M-303 09/11/96 09111/961520 SOP 420 HPLC Analysis HMX Soil S0P420 HPLCAnalyslsforNG Soil SW-846, 3050 ICP/GFAA Metals Digestion Sod SW-846, 6010 Ag lCPMetalsAnalysis(RCRA) Sod SW-846, 6010 Cd ICP Metals Analysts (RCRA) Sod SW-846, 6010 Cr ICP Metals Analysts (RCRA) Sod SW-846, 6010 Pb ICP Metals Analysis (RCRA) Sod SW-846, 7471A CV Mercwy Analysis (RCRA) Sod SW.846, 8260 VolatIle Organics Sod 1544-2 #233, GD221 SFT. E. OF M-303 09111/96 09/1119615:30 S0P420 HPLCAnalysIsHMX Sod SOP 420 HPLCAna1yslsrorNG Soil SW-846, 3050 ICPIGFAA Metals Digestion Sod SW-846, 8010 Ag lCP Metals Analysis (RCRA) Soil SW-846, 6010 Cd ICP MetalsAnalysis (RCRA) Sod SW-846, 6010 Cr ICP Metals Analysis (RCRA) Sod SW-846, 6010 Pb ICP Metals Analysis (RCRA) Soil SW-846, 7471A CV Mercuiy Analysis (RCRA) Soil SW-846. 8260 VolatIle Organics Soil 1544-3 #233, 0D280 2FT. E. OF M-303 09(11/96 09/1119614:25 SOP 420 HPLC Analysis HMX Soil SOP 420 HPLC Analysis for NO Sod SW-846, 3050 ICPIGFM Metals Digestion Soft SW-846, 6010 Ag ICP Metals Analysis (RCRA) Soil SW-846, 6010 Cd ICP Metals Analysis (RCRA) Soil SW-846, 6010 Cr lCP Metals Analysis (RCRA) Soil SW-846, 6010 Pb ICP Metals Analysis (RCRA) Soil SW-846, 7471A CV Mercury Analysis (RCRA) Soil SW-846, 8280 Volatile Organics Sod Page 1 of 29 L544-4 #233, GD28O5FT. E. OF M-303 09/11/96 09/11/9614:48 SOP 420 HPLC Analysis HMX SOP 420 HPLC Analysis for NG Soil SW-846, 3050 ICP/GFM Metals Digestion Soil SW-846, 6010 Ag ICP Metals Analysis (RCRA) Soil SW-846, 6010 Cd ICP Metals Analysis (RCRA) Soil SW-846, 6010 Cr ICP Metals Analysis (RCRA) Soil SW-846, 6010 Pb ICP Metals Analysis (RCRA) Soil SW-846, 7471A CV Mercu,y Analysis (RCRA) So4l SW-846, 6260 Volatile Organics Soil L544-5 #233, GD3402FT. E. OF M-303 09/11/96 09/11/9614:05 SOP 420 HPLC Analysis HMX Soil SOP 420 HPLC Analysis for NG Soil SW-846, 3050 ICP/GFAA Metals Digestion Soil SW-846, 6010 Ag ICP Metals Analysis (RCRA) Soil SW-846, 6010 Cd ICP Metals Analysis (RCRA) Soil SW-848, 6010 Cr lCP Metals Analysis (RCRA) Soil SW-846, 6010 Pb ICP Metals Analysis (RCRA) Soil SW-846, 7471A CV Mercuiy Analysis (RCRA) Soil SW-846, 8260 Volatile Organics Soil L5446 #233, GD34O5FT. E. OFM-303 09/11/96 09/11/9614:12 SOP 420 HPLC Analysis HMX Soil SOP 420 HPLCAna1ysisforNG Soil SW.846, 3050 ICP/GFAA Metals Digestion Soil SW-846, 6010 Ag ICP Metals Analysis (RCRA) Soil SW-846, 6010 Cd ICP Metals Analysis (RCRA) Soil SW-846, 6010 Cr ICP Metals Analysis (RCRA) Soil SW-846, 6010 Pb ICP Metals Analysis (RCRA) Soil SW-846. 7471A CV Mercisy Analysis (RCRA) Soil SW-846, 8260 VolatIle Organics Soil L544-7 #233, GDI4O2FT. E. OFM-303 09/11/96 09/11/9608:40 SOP 420 HPLC Analysis HMX Soil SOP 420 HPLCAna1yslsforNG Soil SW-846, 3050 ICP/GFM Metals Digestion Soil SW.846, 6010 Ag ICP Metals Analysis (RCRA) Sod SW-846, 6010 Cd ICP Metals Analysis (RCRA) Soil SW-846, 6010 Cr lCP Metals Analysis (RCRA) Soil SW-846, 6010 Pb ICP Metals Analysis (RCRA) Soil SW-846, 7471A CV Mercuty Analysis (RCRA) Soil SW-846, 8260 VolatIle Organics Soil Page 2 of 29 L544-8 #233, GD14O 5FT. E. OF M-303 09/11196 09/11/96 08:50 1 SOP 420 HPLC Analysis HMX Soil SOP 420 HPLC Mals r NC Soil SW-846 3050 ICPIGFAA Metals DlgeSbOn Soil SW-846, 6010 Ag ICP Metals Analysis (RCRA) Soil SW-846, 6010 Cd ICR Metals Analysis (RCRA) Soil SW-846, 6010 Cr ICR Metals Analysis (RCRA) Soil SW-846, 6010 Pb ICP Metals Analysis (RCRA) Soil SW-846, 7471A CV Mercury Analysis (RCRA) Soil SW-846, 8260 VolatIle Organics Soil L544-9 #233, GD1I22FT. E. OFM-303 09/11/96 09/1119609.22 SOP 420 HPLC Analysis HMX Sod SOP 420 HPLC Analysis for NC Soil SW-846, 3050 ICP/GFM Metals Digestion Soil SW-846, 6010 Ag ICR Metals Analysis (RCRA) Soil SW-846, 6010 Cd ICP Metals Analysis (RCRA) Soil SW-846, 6010 Cr ICP Metals Analysis (RCRA) Soil SW.846, 6010 Pb ICP Metals Analysis (RCRA) Soil SW-846, 7471A CV Mercury Analysis (RCRA) Soil SW-846, 8260 Volatile Organics Soil L544-10 #233, GD1I2 SET. E. OFM-303 09/11196 09/11/9609:30 SOP 420 HPLC Analysis HMX Soil SOP 420 HPLC Analysis for NC Soil SW-846, 3050 ICP/GFAA Metals Digestion Sod SW-846 6010 Ag ICR Metals Analysis (RCRA) Soil SW46, 6010 Cd ICR Metals Anais (RCRA) Soil SW-846, 6010 Cr ICP Metals Analysis (RCRA) Soil SW-846, 6010 Pb ICP Metals Analysis (RCRA) Soil SW-M6, 7471A CV Mercury Analysis (RCRA) Soil SW-846, 8280 VolatIle Organics Soil L544-11 #233. GDSS2FT. E. OFM-303 09/11/96 09/11/9609:55 SOP 420 HPLC Analysis HMX Sod SOP 420 HPLC Analysis for NC Soil SW-846, 3050 ICP/GFAA Metals Digestion Soil SW-846, 8010 Ag ICP Metals Analysis (RCRA) Soil SW-846, 6010 Cd lCPMetalsAnalysls(RCRA) Soil SW.846, 6010 Cr ICR Metals Analysis (RCRA) Soil SW-846, 6010 Pb ICP Metals Analysis (RCRA) Soil SW-846, 7471A CV Mercury Analysis (RCRA) Soil SW-846, 8260 VolatIle Organics Soil Page 3 of 29 1544-12 #233, GDS55FT. E. OF M303 09111/96 09/11/96 1002 SOP 420 HPLC Analysis HMX Soil SOP 420 HPLC Analysis for NG Sod SW-846, 3050 ICPIGFAA Metals Digestion Soil SW-848, 6010 Ag ICP Metals Analysis (RCRA) Soil SW-846, 6010 Cd ICR Metals Analysis (RCRA) Sod SW-846, 6010 Cr ICP Metals Analysis (RCRA) Soil SW-846, 6010 Pb $CP Metals Analysis (RCRA) Soil SW-846, 7471A CV Mercuiy Analysis (RCRA) Soil SW-846, 8260 Volatile Organics Soil 1544-13 #233, GD4592F1. E. OF M-303 09111/96 09/11/96 1t06 1 SOP 420 HPLC Analysis HMX soil SOP 420 HPLCAnaIyslsforNG Soil SW-846, 3050 ICP!GFAA Metals Digestion Soil SW-846, 6010 Ag ICP Metals Analysis (RCRA) Soil SW-846, 6010 Cd ICP Metals Analysis (RCRA) Soil SW-846, 6010 Cr ICP Metals Analysis (RCRA) Soil SW-846, 8010 Pb ICR Metals Analysis (RCRA) Soil SW-846, 7471A CVMercuiyAnalysis(RCRA) Sod SW-846, 8260 VolatIle Organics Soil L544-14 #233, GD4595FT. E. OF M-303 09/11/96 09/11/9611:33 SOP 420 HPLC Analysis HMX Soil SOP 420 HPLCAna1ysIstorNG Soil SW-846, 3050 ICPIGFAA Metals Digestion Soil SW.-846, 6010 Ag ICR MetalsAnalysis (RCRA) Soil SW-846. 6010 Cd ICP Metals Analysis (RCRA) Soil SW-846, 6010 Cr ICP Metals Analysis (RCRA) Soil SW-846, 6010 Pb ICR Metals Analysis (RCRA) Soil SW-846, 7471A CV Mercuiy Analysis (RCRA) Soil SW-846, 8260 VolatIle Organics Soil L544-15 #233, GD3992FT. E. OFM.303 09/11/96 09/11/9611:50 SOP 420 HPLC Analysis HMX Soil SOP 420 HPLC Analysis for NG Soil SW-846, 3050 ICPIGFAA Metals Digestion Soil SW-846, 6010 Ag ICP Metals Analysis (RCRA) Soil SW-846, 6010 Cd ICP Metals Analysis (RCRA) Soil SW-846, 6010 Cr ICP Metals Analysis (RCRA) Soil SW-846, 6010 Pb ICR Metals Analysis (RCRA) Soil SW-846, 7471A CV Mercury Analysis (RCRA) Soil SW-846, 8260 VolatIle Organics Soil 1544-16 #233, GD399 2FT. DUP E. OF P4303 09/11/96 09/11/96 11:50 SOP 420 HPLC Analysis HMX Set SOP 420 HPLC Analysis for NG Soil SW-846, 3050 ICPIGFM Metals Digestion Set SW-846, 6010 Ag ICP Metals Analysis (RCRA) Soil SW-846, 8010 Cd ICP Metals Analysis (RCRA) Soil SW-846, 6010 Cr ICP Metals Analysis (RCRA) Soil SW-846, 6010 Pb ICR Metals Analysis (RCRA) Soil SW-846, 7471A CV Mercury Analysis (RCRA) Soil Page 4 of 29 [ L544-17 #233, G0399 5FT. E. OF M-303 09111/96 09/11/96 12.02 SOP 420 HPLC Analysis HMX Soil 50P420 HPLCAnalyslsforNG Soil SW-846 3050 ICP/GFM Metals Digestion Sod SW-846, 6010 Ag ICP Metals Analysis (RCRA) Soil SW-846, 6010 Cd ICR Metals Analysis (RCRA) Sod SW-846, 6010 Cr ICP Metals Analysis (RCRA) Soil SW-846. 6010 Pb ICR Metals Analysis (RCRA) Sod SW-846. 7471A CV Mercury Analysis (RCRA) Soil SW-846, 8260 VolatIle Organics Soil L544-18 #233, GD431 2FT. S. OFM-303 09/11/96 09111/96 13:30 SOP 420 KPLC Analysis HMX Soil SOP 420 HPLCAnalysisforNG Sod SW-846, 3050 ICP/GFM Metals Digestion Soil SW-846, 6010 Ag ICP Metals Analysis (RCRA) Soil SW-846, 6010 Cd ICPMetalsAnalys4e(RCRA) Soil SW-846. 6010 Cr ICP Metals Analysis (RCRA) Soil SW-846, 6010 Pb ICP Metals Analysis (RCRA) Soil SW-846, 7471A CV Mercury Analysis (RCRA) Soil SW-846, 8260 VolatIle Organics Soil L544-19 #233. GD431 5FT. E. OFM-303 09111/96 09111/9613:43 SOP 420 HPLC Analysis HMX Soil SOP 420 HPLCAnalyslsIorNG Soil SW-846, 3050 ICP/GFAA Metals Digestion Soil SW-846 6010 Ag ICP Metals Analysis (RCRA) Soil SW6, 6010 Cd ICP Metals Mals CRA) Soil SW-846, 6010 Cr ICP Metals Analysis (RCRA) Soil SW-846, 6010 Pb ICP Metals Analysis (RCRA) Soil SW-846, 7471A CV Mercury Analysis (RCRA) Sail SW-846, 8260 VolatIle Organics Sail L544-20 #233, G05122FT. E. OFM-303 09111/96 09/11/9614:02 SOP 420 HPLC Analysis HMX Soil SOP 420 HPLC Analysis for NO Soil SW-846, 3050 ICPIGFM Metals Digestion Sail SW-846, 6010 Ag ICP Metals Analysis (RCRA) Soil SW-Me, 6010 Cd ICP Metals Analysis (RCRA) Soil SW-846, 6010 Cr ICP Metals Analysis (RCRA) Soil SW-MS. 6010 Pb ICP Metals Analysis (RCRA) Soil SW-846, 7471A CV Mercury Analysis (RCRA) Sod SW-846, 8260 Volatile Organics Soil Page 5 of 29 1.544-21 #233, GD5I25FT. E. OF M-303 09/11/96 09/11/9614:20 1 SOP 420 HPLC Analysis HMX Soil SOP 420 HPLC Analysis for NG Soil SW-846, 3050 ICP/GFM Metals Digestion Soil SW-846, 6010 Ag ICP Metals Analysis (RCRA) Soil SW-846, 6010 Cd ICP Metals Analysis (RCRA) Soil SW-846, 6010 Cr ICP Metals Analysis (RCRA) Soil SW-846. 6010 Pb ICP Metals Analysis (RCRA) Soil SW-846, 7471A CV Mefcury Analysis (RCRA) Soil SW-846. 8260 Volatile Organics Soil 3 Certified By Date This is to certjfr that thefollowing samples were an¬4pzed using good laboratoy practices to show thefèlowing results: Page 6 of 29 0 a. E U) U) C) U) -j U) :ii 9 . 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U) U) It) VI IA U) F F F F F F F F F F F F F FF F - F F F F F F F FF F F F F FF i ftfUUUfUuI F F F F F --------- --------- a- F - F F F I- F F 00000000000000000000000eee0000eo F F F F F F I F F FFF - - F - F F F Fr__F F F F F F F F F 000000 ccHccccHcccccdHccccccc F t) N U) U) U) VI U) U) U) U) It) It) It) IA It) IA It) It) It) U) It) It) It) It) It) It) It) It) F F F F F F F F F F F F F F F F F F F - F F F F F F F 14) Fr o000 tfUUUfUUUUU F F F F F F F F F F F F F F F F F F F F F F F F F F F F - F F - a- IA F F F F F F F F F F F F F F F F F - F F F F F F ccccccHccccHcccc E1 Ti I' T Ti a . a . a S a S S " " TT a 9, " Ti 'rt " S " " "" " Ti Ti Ti .. '55 " Ti " Ti. ,- ,- I' " ' ' ' S . I . " , ," . . . . . , . " " " " " " " " --.5 Ti, " -. ".... ":':.'.',' -a-- . . P " - . , " . 1 " . . - V V V - C) '- I- I- - I. -. - I - i i I - I 1 I IV i 00 i, ' i 11 I 0 0) 0 0. 000 I- - r - - - - I - 1- I 1 r , ---- , --- - - - q - - - ,- . 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B This flag is used when an analyte is found in the blank as well as the sample Det. Limit Method Detection Limit (approximately three times the signal noise level) Rep. Limit Reporting Limit is noiTnally the value of the lowest standard run with the analysis. The value is approximately 5 to 10 times the Method Detection Limit. Dii. Factor Dilution Factor - The prepared sample was diluted by this factor because the sample was too concentrated or due to other interferences in the sample matrix. Any dilution factor causes an appropriate inciase in the method detection limit and reporting limit. J Gas Chromatography and Mass Spectral Data Flag. Indicates an estimated value. This flag is used either when estimating a concentration for tentatively identified compounds or when the data indicated the presence of a compound that meets the identification criteria but the result is less than the specified reporting limit (e.g. 3 J with a reporting limit of 10) Page 29 of 29