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Washington Navy Yard

EPA Region 3 (Mid-Atlantic)

District of Columbia

EPA ID# DC9170024310

Congressional District

Last Update: November 2014

Other Names


Current Site Status

OU-2 Near Shore Sediment Study

The Navy has completed the Phase III Sampling and Analysis Plan (SAP) for the Near Shore Sediments Study in the Anacostia River. The SAP was reviewed by PCB fingerprinting experts from EPA, the District of Columbia Department of the Environment (DCDOE), and the Navy.  The Navy is scheduled to submit the final SAP in in April 2015 and complete the sediment sampling in the Anacostia River in September 2015.  Some of the delays in the scheduling are due to the additional fingerprinting analysis of the PCBs in the river. The fingerprinting analysis may reveal a specific signature of the contamination that could be traced back to the Navy Yard.

Site - 8

EPA is currently reviewing the EE/CA for the 8 which is a former paint and oil storage building. The proposed remedial action is to excavate an approximately 300 square foot area of trichloroethene (TCE) contaminated soil.  EPA is scheduled to complete the review in December 2014.

OU – 1 (Site Wide Groundwater Study)

The revised remedial investigation for the site-wide groundwater study is scheduled to be submitted to EPA for review in December 2014.

The Navy held the annual Restoration Advisory Board Meeting on October 8, 2014.

Site Description

The Navy has always owned WNY, the Navy’s oldest shore station and the oldest continuously operated federal facility in the United States. It was established on October 2, 1799, as a shipbuilding yard on land set aside by a presidential order (EPA, 1999).
WNY is located on approximately 63 acres in southeastern Washington, DC. At its largest, WNY occupied approximately 129 acres. After World War II (WWII), WNY’s role began to shift from primarily manufacturing to administration, which gradually resulted in the need for fewer facilities and less land. In the early 1960s, 63 acres
were sold to the General Services Administration (GSA) for the Southeast Federal Center (SEFC).   WNY’s original mission was the construction and maintenance of naval vessels. The prevalent activities at WNY from its establishment were industrial development and ordnance production. Ordnance production became WNY’s mission by the 1860s. By WWII, the Yard served as the primary naval ordnance plant. The weapons designed and built there were used in every war in which the United States fought until the 1960s. At its peak, WNY consisted of 188 buildings and employed nearly 25,000 people. Small components for optical systems and enormous 16-inch battleship guns were all manufactured there. In December 1945, the Navy Yard was renamed the U.S. Naval Gun Factory.  In 1959, WNY was re-designated the United States Naval Weapons Plant. After WWII, administrative activities continued to replace industrial work as the primary function of the facility. Some industrial activities continued for some years after WWII until finally being phased out in 1961. In July 1962, the installation became the Washington Navy Yard Annex. On 1 July 1964, it reverted to its traditional name of
Washington Navy Yard. The deserted factory buildings began to be converted to office use.2 Simultaneous with WNY’s development, additional property was added by filling a shallow embayment of the Anacostia River. The source of the material used to fill the embayment was not documented. Archival records indicate that the hulls of five ships scuttled during the 1812 British invasion are buried in the fill material. Cannons have been found during excavations, and a small quantity of elemental mercury was found and removed.  Currently, WNY consists of administrative, supply, and storage buildings; residences; training facilities; and museums. Many former industrial and storage buildings have been converted to office buildings. Several buildings were renovated for office space to accommodate approximately 4,000 employees who, in 2001, were reassigned to WNY from leased offices in northern Virginia.

Site 1—Building 22 (Lead and Brass Foundry)

Site 1 comprises a multistoried brick building, Building 22, and the soils directly adjacent to it. Surrounding areas consist of pavement, concrete and other buildings. It is the location of a former foundry for the manufacture of brass cannons, shells, and shot. Other machinery has also been constructed where Building 22 currently is located. Activity locations here included a 6-inch-gun shop, miscellaneous shops, an erecting shop, a general machine shop, and a laundry facility. Based on historical and current processes and suspected past waste disposal practices, residues from the processes listed above may have contributed to the contamination of the soil surrounding Building 22. Historically, it is known that heavy metals were used in ordnance production. Solvents, such as carbon
tetrachloride, also were used for cleaning. Cyanide and phenols were used for cooling, and solvents and metals (lead, chromium, cadmium, and antimony) were used for paint spraying. Perchloroethylene, carbon tetrachloride,dichloroethene, and vinyl chloride may be associated with laundry facility processes (EPA, 1999). Analytes of interest (AOIs) at this site are metals, volatile organic compounds (VOCs), semivolatile organic compounds
(SVOCs), and cyanide.



Site 2—Buildings 33, 33a, 36, 37, 39, and 109 Quadrangle
(Gun Carriage Shop)

Site 2 consists of Buildings 33, 33a, 36, 37, 39, and 109—known as the Quadrangle Complex. The surrounding areas consist of pavement, concrete, and other buildings. The Quadrangle Complex is believed to be the original machine shop location at WNY and was constructed in phases between 1854 and 1860 with the exception of Building 37, which was constructed in 1899 as a toilet. The buildings were then used primarily as storage facilities for the Navy Exchange System and WNY Supply Department until the 1990s, when all of the Site 2 Quadrangle Complex buildings were fully gutted and renovated within the original building footprints. A battery shop, containing automotive-type batteries, was believed to be located in former Building 33a in a small cinderblock addition to Building 33. The FFA formerly identified the presence of an acid room and flammable storage area in Building 33a. This information was not confirmed by recent historical research of the Quadrangle Complex performed by the naval historian. Potential hazardous substances associated with general machine shop operations may be assumed to include solvents, such as carbon tetrachloride, and metals used in paint-spraying may have contributed to the soil and groundwater contamination. AOIs at this site are metals and VOCs.

Site 3—Buildings 40 and 41 (Gun and Metal Plating Shop)
Site 3, a sloped, grassy area, is the former location of Buildings 40 and 41. The surrounding areas consist of pavement, concrete, and other buildings. Electroplating was performed in Building 41 in the 1950s using equipment that consisted of three deep plating pits (one 75 feet deep and two 69 feet deep) for the longer gun barrels and a number of plating and other storage tanks These pits were believed to be filled with rubble or granular material. Additionally, underground rooms beneath Dahlgren Avenue were left in place after the demolition of Buildings 40 and 41. Through the years, Buildings 40 and 41 were transformed from a gun shop to a plating shop, and then to offices before demolition in 1977. Typically, a large variety of heavy metals,
acids, cleaners, and caustics were used during plating operations. These materials may have contributed to the soil contamination at Site 3. The Fire Control School operated here, providing training in the operation and aiming of naval guns (not training in fighting fires). AOIs at this site are metals, VOCs, and cyanide.

Site 4—Buildings 44, 46, 67, and 108 (Cartridge Case Shop)

Site 4 includes Buildings 44, 46, 108, 67, and the adjacent soil. The buildings are multistoried, brick structures. The surrounding areas consist of pavement, concrete, and other buildings. Building 46 was used as a copper-rolling mill, cartridge-case shop, metal pressings shop, Navy Exhibit Center, offices, and warehouse. Currently, it contains
the Navy Exhibit Center, shop, and warehouse. Building 46 also contained waste channels, scale pits, and various other pits under the flooring.
Building 108 was originally used in 1872 as an anchor and faggoting shop. It also was used for a cartridge-case shop, chemical laboratory, seamen shop, offices, and storage. Based on the historical operational processes associated with it, residues from solvents, phenols, and metals may be present. An industrial sewer line (designated as a river water line), apparently for conveying industrial waste, ran north-south between Buildings
108 and 67). Building 67 can be traced back to 1898 and was used as a cartridge-case shop, primer shop, furnace room, metal pressings shop, storage, and Navy Exchange Center. Acid pits were also located in its northern portion AOIs at this site are metals and SVOCs.

Site 5—Building 73 (Gun Mount, Metal-Cleaning, and Fabricating Shop)

Site 5 includes Building 73 and adjacent soils. Building 73 is a multistoried brick building. Surrounding areas include pavement, concrete, and other buildings. Activity at this location can be traced to 1845, when an ordnance laboratory was established. WNY’s 1872 plan shows the area as a vacant lot. The 1898 plan indicates underground storage tanks (USTs) on this site. Building 73 was constructed during 1901 and 1902 and used as a specialized gun-mount shop. It also was utilized as a secondary mount shop, roughing shop, erecting shop annex, broadside mount shop annex, Shop 28 Annex 2, aluminum-cleaning facility, welding and fabricating shop, storage, snack bar, and supply department. The aluminum-cleaning facility contained 10 aboveground tanks storing iridite and alkaline for etching, degreasing tanks with sump pumps, deoxidizer tanks, and tanks of non-etching-related alkaline AOIs at this site are metals, VOCs, and SVOCs. It is known that solvents, phenols, and metals were historically used in cleaning, cooling, and paint-spraying activities. A variety of wastes could have been generated from processes when the building was used as an aluminum cleaning facility and may have contributed contamination to the soil and groundwater at Site 5.


Site 6—Buildings 116, 118, and 197 (Heating and Former Power Plant,
Gun Assembly Shop)

Site 6 includes Buildings 197, 116, and 118 and adjacent soils. The buildings are multistoried brick structures, and the surrounding areas consist of pavement, concrete, and other buildings. Before construction of Building 197, an old scale pit, a fuel oil tank, Building 126, Building 127, and Building 150 were scheduled to be removed to
facilitate the placement of the building’s foundation. A gun pit was installed in the building’s northern end, 12 feet below the ground-floor level. It was used as a gun assembly shop and is currently abandoned. It is known that solvents such as carbon tetrachloride were used for cleaning, and metals (lead, chromium, cadmium, and
antimony) were used in paint-spraying operations. Fuel oils, greases, metals, and solvents may have contributed to the contamination found in the soil and/or groundwater at Site 6.
The area of Buildings 116 and 118 can be traced back to 1904 as it was gradually filled in with material of unknown composition before 1902. The two buildings were constructed shortly after 1904. Building 116 has
operated as the boiler house since its construction and Building 118 operated as WNY power plant. An ash sedimentation pit was located south of Building 116 and later converted to a coal storage area. AOIs at this site are metals, SVOCs, and VOCs. In addition to the AOIs (metals, SVOCs, and VOCs) specified in the RCRA Consent Order and the FFA for Site 6, PCBs and dioxins and furans are considered as AOIs for Site 6.


Site 7—Building 126 (Laundry)

Site 7 includes Building 126, a multistoried brick structure, and the adjacent soils. Surrounding areas consist of pavement, concrete, and other buildings. This site was used as the receiving station laundry from 1938 through 1950. Offices and the Naval Command System Support Activity also used this site. According to the FFA, solvents (perchloroethylene, carbon tetrachloride, dichloroethene, and vinyl chloride) associated with dry cleaning processes may have contributed contamination to the soil and groundwater at Site 7; however, it has since been determined that no dry cleaning activities were performed at Building 126. Based on recent historical information contained in the Building 126 Literature Search it was determined that the building was used only as a laundry, housing clothes washers and dryers.


Site 9—Buildings 219 and 220 (Gauge and Chemical Laboratory)

Site 9 includes Buildings 219 and 220 and the adjacent soils. Both buildings are multistoried brick structures. Surrounding areas consist of grass, pavement, concrete, and other buildings. Building 219 was used as a gauge laboratory and machine shop from 1944 to 1962. The building also operated as offices, a chemical laboratory, and
the home of the Naval Weapons Quality Assurance Officer. As stated in the FFA, mercury, a material associated with typical gauge laboratories, may have been released in
Building 219 and may have affected the underlying soils due to the presence of porous wooden floors within the building; however, recent historical research indicates that the Building 219 floors consisted of a concrete floor underneath the wooden floor. Therefore, a porous wooden floor does not exist at Building 219. AOIs at this site are metals and cyanide.

Site 10—Admiral’s Row (Flag, Captain, and Visiting Officer Housing)
Admiral’s Row is the designation given to a group of buildings located along Warrington Avenue that are currently used to house naval officers and their families and include Quarters A, B, C, D, E, F, G, H, K, L, M, M-1, N, O, P, R, S,T, U, V, W, and Y; Buildings 1, 59, and 61; and Leutze Park. These are multistoried residences with adjacent areas consisting of grass, pavement, concrete, and other buildings. Maintenance of these buildings with lead-based paints, lead roofing materials, and lead water mains is believed to be the source of lead-contaminated soil. The AOI at this site is lead.


Site 11—Incinerators (Former Incinerators)

Site 11 consists of two former incinerators located in the southeastern corner of the Building 166 parking lot. The removal of the two incinerators and associated structures (watch house and footings) appears to have been completed to a depth of 12 inches. The materials incinerated were classified materials consisting of paper, cellophane, film, and Mylar. The site is presently used as a parking area. AOIs at this site are dioxins, SVOCs, and metals.

Site 12—Stormwater Lines from Site 4 to Outfall 5 (Deleted from List)

Site 12 consisted of the stormwater line running from the area of Site 4 to Outfall 5. Material that accumulated in this pipe contained elevated levels of heavy metals, PAHs, and PCBs. The potential source of this contaminated material may have included past releases from Site 4. For the remainder of this document, Site 12 is considered to
be a part of Site 4.

Site 13—Building 290 (Electrical Equipment)

Site 13 includes Building 290 and the soil adjacent to it. It is located south of Admiral’s Row and north of Buildings 40 and 41. It was suspected to house PCB-containing equipment in the past; however, it does not presently house PCB-containing equipment. PCBs have been found in the soil. AOIs at this site are PCBs.

Site 14—Building 292 (Electrical Equipment)

Site 14 includes Building 292 and the adjacent soils. Building 292 is a small, single-story brick structure. Surrounding areas consist of paved parking and other brick buildings. It previously housed a PCB-containing portable generator. The leaking generator is believed to have contaminated the soils. No PCBs are presently housed there. Analytical results on a standing water sample from the Building 292 basement did not indicate detectable concentrations of benzene, toluene, ethylbenzene, and xylenes; pesticides; or PCBs. Only low levels of total petroleum hydrocarbons were detected AOIs at this site are PCBs and metals.

Site 15—Stormwater Lines from Site 6 to Outfall 10 (Deleted from List)

Site 15 consists of the stormwater line running from the area of Site 6 to Outfall 10. Material that accumulated in this pipe contained elevated levels of levels PCB, PAHs, and metals in concentrations above EPA screening criteria. The potential sources of this contaminated material may have included Site 6 and offsite contaminated soil from
the SEFC, currently operated by GSA. For the remainder of this document, Site 15 is considered to be a part of Site 6.

Site 16—Building 71 (Gasoline and Diesel Fuel Station)

The area defined as Site 16 is located in the south-central portion of WNY, adjacent to the Anacostia River.  Site 16 encompasses Building 71 and its current and former USTs, several monitoring wells, stormwater lines traversing the site, and an area where a small quantity (estimated at less than 1 cup) of free-phase mercury was discovered in the subsurface. The stormwater lines that run through the site terminate at Outfalls 5 and 6. The petroleum portion of this site has since been removed from the ER Program and is being addressed under the UST Program.


Site 17—Building 201 (Automotive Maintenance Facility)

This site includes former Building 201 and the adjacent soils. Former Building 201 was a two-story concrete and brick building. It was constructed as a maintenance facility for automotive equipment and official government cars. Building 201 was investigated because of past and current public works operations. Miscellaneous operations are suspected of contributing to the contamination found in site soil and groundwater.
AOIs at this site are VOCs, pesticides, metals, PCBs, and SVOCs. Building 201 and adjacent Buildings 198 and 142 were demolished around 1999 and a new four-story office building (new Building 201) was constructed in their places.

 Site 21—Buildings 68, 123, 130, 133, 154, 224, and 246 (Ship Repair

The Ship Repair Department (initially identified as SSA 3) consists of existing and previously existing Buildings 68, 123, 130, 133, 154, 224, and 246; Wharf No. 1; the marine railway; and Slip No. 1. The department overhauled and repaired small craft such as tugboats, barges, yachts, tenders, pile drivers, lighters, floats, derricks, and patrol
vessels. The Ship Repair Department generally operated from the late 1890s to approximately 1980. SSA 3 was elevated to ER site status in 2006. AOIs for this SSA are metals, SVOCs, and VOCs.

 Site 22—Building 112 (Polishing and Plating Shop)

Building 112 was constructed in 1903 and served as the Seaman Gunner’s Repair and Storehouse. Operations such as light machining, benchwork, and light motor overhaul and assembly were likely conducted here. It was converted to an electroplating plant in the 1920s in support of the manufacture of naval guns. Operations included plating with chromium, cadmium, nickel, copper, lead, tin, gold, and silver. Pickling, parkerizing, and
polishing operations were conducted in the building in addition to plating. Since the 1920s, it has housed the Navy Band and has operated as a storage facility. AOIs for this site are metals, VOCs, and cyanide.
This site was initially identified as SSA 8. In 2006, the WNY Tier 1 Partnering Team concluded that additional investigation at SSA 8 was appropriate because of recent renovation/activities at Building 112 (that is, SSA 8) that revealed elevated chromium levels in the soil in May 2004. Therefore it was recommended that SSA 8 become an ER site (Site 22).

Site 23—Building 76 (Breech Mechanism Shop)

Building 76 (initially identified as SSA 10) was constructed in 1899 as a Breech Mechanism Shop. It generally served as a large machine shop and included the manufacturing and assembling operations of breech mechanisms for guns. Manufacturing operations ceased in 1961. After extensive renovations, during which the original flooring was removed, the building began serving as the Navy Museum. Building 76 was originally listed as a potential AOC, but after further review of the building history, the building was assigned as SSA 10. SSA investigation activities identified potential unacceptable risks related to PAHs in the soil. As a result, the SSA was elevated to ER
Site status as Site 23 in 2006. AOIs for this site are metals, SVOCs, and VOCs.


Site 24—Quarters U, Building 172, and Former Buildings 185 and 261
Site 24 (initially identified as SSA 14), Building 172 (where former Buildings 185 and 261 were located), was associated with the historical Experimental Ammunition Unit and Mine Laboratory activities. Quarters U was constructed as a Mine Building Annex in 1937  and was one of several buildings that constituted the Experimental Ammunition Unit and Mine Laboratory that was established at WNY between 9th Street and 11th Street in 1919. Initially, the Experimental Ammunition Unit and Mine Laboratory included Buildings 172, 185, and 261, as well as two small dwellings that were originally occupied by private citizens, until the Navy acquired WNY’s eastern portion during World War I. In 1937, the Navy constructed Building 195 (now Quarters U), to replace the two small dwellings. The work performed by the Experimental Ammunition Unit and the Mine Laboratory included the development of new, experimental projects involving pyrotechnic devices. In addition, the Experimental Ammunition Unit developed a number of pyrotechnic fuses, requiring the handling of small amounts of explosives that ranged from black powder to trinitrotoluene (better known as TNT). The handling of the pyrotechnic materials and explosives was performed in the two old dwellings until 1924, when one of the dwellings was destroyed by an explosion. A 1928 naval gun factory annual report stated that these buildings were inadequate for this type of work because of their construction (wood and plaster) and lack of space, both contributing to safety concerns for personnel. Because of the explosion and this concern, Building 195 (present Quarters U) was constructed in 1937. Sometime during WWII, the Experimental Ammunition Unit and the Mine Laboratory were combined to form the Naval Ordnance Laboratory. The laboratory relocated to form the Naval Surface Warfare Center—White Oak in Silver Spring, Maryland, following the end of WWII. There is no documentation detailing a release or disposal practices; however, an explosion incidence report details a 1924 explosion in one of the two small dwellings.

Site Responsibility

Cleanup of the site is being addressed under Federal actions.

NPL Listing History

The site was proposed to the National Priorities List of the most serious uncontrolled or abandoned hazardous waste sites requiring long term remedial action on May 5, 1998.  The site was formally added to the list August 27, 1998.

Threats and Contaminants

Trivalent and hexavalent chromium in soil. PCB contamination in soil, sediment and groundwater. Organics and chlorinated solvents in groundwater. Organics, metals, and PAHs in soil.

Contaminant descriptions and associated risk factors are available from the Agency for Toxic Substance Disease Registry (ATSDR), an arm of the CDC, website.

Cleanup Progress

Storm Sewer Cleanout for WNY Outfalls 5 and 10—On the basis of the Baker (1993) PA report and the EPA (1995) special sampling investigation report,8 the Navy conducted a removal action in 1996 to eliminate potential releases of contaminants from two storm sewer lines, which ran from Site 4 to storm sewer Outfall 5 and from Site 6 to storm sewer Outfall 10. Sediments in these storm sewers were found to contain heavy
metals and PCBs that may have originated in releases from Sites 4 and 6 or, in the case of Outfall 10, from offsite at the SEFC, which was formerly part of WNY during its industrial period. Elevated levels of PAHs also were detected in the sediment that had accumulated in these storm sewer pipes.

• Storm Sewer Rehabilitation—A removal action was completed in December 2000 for removal of contaminated sediments from, and refurbishing and/or replacing, subsurface storm sewer piping and structures throughout the WNY. Ninety-nine percent of the storm sewers located on WNY were replaced or relined.
• Site 6 (the former Coal Storage Yard south of Building 116)— A removal action was performed to abate PCBs, heavy metals, PAHs, and other contaminants found in soil that had accumulated within the concrete-lined coal storage bin. The presence of these contaminants was initially documented in the SI report. The Navy completed the removal action in November 1997 and submitted the final closure report to EPA in July 2000.

• Site 6 (Building 118 Trough)—In May 2001, PCB-contaminated detritus (dirt and other debris that accumulated inside the building sump) was removed from the Building 118 basement sump (trough), as detailed in the final closeout bulletin dated July 24, 2001

• Site 6 (Building 118)—During sampling events in March 2006 for the Supplemental Focused RI, elevated concentrations of PCBs were detected in detritus throughout the floor areas of Building 118 and the sump (trough) that had been cleaned in 2001. An Engineering Evaluation/Cost Analysis (EE/CA) (CH2M HILL, 2007c) recommended that an NTCRA be executed to remove the PCB-containing detritus from everywhere within
Building 118. The NTCRA was subsequently conducted in October and November 2007 and documented in a closeout report dated February 1, 2008.

• Site 10 (Admiral’s Row housing) abatement of lead in soil—NTCRAs were completed to remove lead-affected soil at all quarters and buildings at Site 10. These removal actions were performed periodically (as the quarters/buildings became available) at Quarters A, B, C, D, E, F, G, H, L/L-1, M, M-1, N, O, P, R, S, T, U, V, W,
Building 1, and Leutze Park between 2003 and 2008. As of February 2008, all Site 10 removal actions had beencompleted and are documented in the Site 10 removal action master report.

• Site 14 (Building 292)—The Navy completed a removal action to abate PCBs in the soil around this building in November 1997 and submitted the final closure report dated July 17, 2000.

• Site 16 (Building 71)—In June 1999, a time-critical removal action (TCRA) for soil was conducted at Site 16 to remove a small amount (estimated at less than 1 cup) of free-phase mercury observed in subsurface soil samples during the Site 16 RI.  The removal action activities were summarized in the Site 16 Mercury Removal Action Closeout Summary.

In addition, site removal evaluations were conducted at Sites 7, 11, and 13 in 1999, indicating time-critical soil removal actions were not needed at these three sites (but further evaluation for remediation was to be completed at a later date). These evaluations were completed in 2005 and no remediation was warranted.


 Proposed Plans and Records of Decision

The purpose of a Proposed Plan is to present the preferred alternative for RA at a site following the RI phase of the environmental restoration process. The Proposed Plan provides the rationale for the proposed recommendation, based on all of the investigative activities performed at the site.

The Proposed Plans for WNY sites are developed by the Navy with input and concurrence by EPA and DDOE.  Each plan is also reviewed by the public during a 30-day public comment period. During this period, a public meeting is held at which the Navy, EPA, and DDOE provide an overview of the site, previous investigations, remedial alternatives evaluated, and the Preferred Alternative; answer questions; and listen to and acknowledge public comments.

Following the public comment period, the Navy and EPA, in consultation with the District of Columbia, make a final decision based on the response action for the site after reviewing and considering all information submitted during the 30-day public comment period. Community involvement during this stage of the environmental restoration process is critical and the public is encouraged to review and comment on the Proposed Plans. After the public comment period has ended and the information submitted during that time has been reviewed and considered, the action elected for the site is documented in a Record of Decision (ROD). The ROD is prepared following the close of the public comment period for the Proposed Plan. The ROD is a public document that explains the selected remedial alternative on the basis of the technical analysis in the RI/FS and
consideration of public comments and community concerns generated during the public comment period for the Proposed Plan.  Proposed Plans and RODs have been completed for Sites 1, 2, 3, 4, 5, 7, 9, 10, 11, 13, 14, 16, 17, and 23.


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