The 4.18-acre cleanup Site 34 in the old runway area next to the Oakland estuary looks barren from a distance. But up close there are concrete slabs and pavement, reminders of its bygone days as a bustling workshop area.
This area was once part of the division known as the Naval Air Rework Facility (NARF). Everything from sandblasting and painting, to metal working, woodworking, and scaffold maintenance went on out there. More than 40 years of activity left soil around buildings contaminated with lead, arsenic, pesticides, PCBs, and aircraft and diesel fuel. Above ground fuel storage tanks and electrical transformers contributed to the contamination.
The Navy will clean up the soil in this area next year. Their draft work plan, which will be released on July 31, was discussed during a Navy presentation at the July 2012 Restoration Advisory Board (RAB) meeting.
Based on more than 200 soil samples taken in prior years and this year, the contractor created the draft work plan. Separate groundwater samples indicate contamination from the solvent trichloroethane. No remedial action is being taken on the trichloroethane, however, because 1) vapor intrusion into residences is not a factor, as this land will become Public Trust Land on which housing is not permitted; and 2) water monitoring has shown that the chemical is not migrating toward the estuary.
The northern edge of this site is part of the early westward land extension of Alameda, which allowed trains carrying freight and passengers to get out to a point where the water was deep enough for ferry connections. More fill was later added to the area. According to the Navy’s Remedial Investigation report, “In the 1920s, most of IR Site 34 was filled with estuary dredging material during construction of the Posey Tube.”
By the time the closure of the Navy base was announced in 1993, this workshop area had 12 buildings, 7 aboveground storage tanks, 2 “generator accumulation points” (waste storage), 15 transformers, and over 7,000 feet of aviation fuel line. Between 1996 and 2000 everything except the concrete pads and pavement was removed.
Building demolitions ended shortly after Alameda Point became a Superfund site in July 1999. The Superfund program, officially called the Comprehensive Environmental Response, Compensation, and Liability Act (CERCLA), does not allow for land improvements such as building demolition.
Most of the soil cleanup locations are adjacent to the exterior edges of old building slabs. Much of the lead in the soil came from sandblasting lead-based paint. Other contamination came from lubricants used for metals fabrications, and the use of oils and solvents for woodwork and metal work. In addition to removing soil next to the slabs, the contractor will dig under the slabs at the hot spots to take what is called a sidewall sample to confirm that all contaminated soil is removed. They have to keep digging as long as contamination is found. Clean soil will be brought in to the areas where soil is removed.
A strip of coastal marshland running along the Oakland Estuary on the north end of the site has no contamination. Its habitat quality, however, is marred by discarded concrete, wood, and trash. It will be up to the city to initiate wetlands restoration efforts there.
A 60-day public comment period on the work plan begins when it’s released on July 31. The work plan will be finalized in January 2013. Fieldwork is anticipated to take place January through April 2013.
Site 34, located in the Northwest Territories, is expected to be given to the City of Alameda in 2014.
The environmental remediation work plan for the Site 2 waste disposal area was finally introduced for public comment in early May after a decade on the Superfund list. During the 60-day public comment period that ended July 9, numerous agencies, groups, and individuals offered their critique of the Navy’s plans to install a suitable soil cover over the substandard soil cover that currently overlays the waste. Digging up the waste and hauling it away was ruled out in 2010 because of the $900 million price tag. Exclusionary security fencing, soil gas vents, wetlands, and geological/seismic stability due to close proximity to the Bay are issues receiving attention.
The Navy’s industrial waste dump on Alameda Point’s southwestern corner has been the subject of environmental concern since the 1980s when the Water Board ordered the dump closed. The mid-1980s were a little more than a decade after passage of the federal Clean Water Act and the emerging environmental awareness and new regulations requiring underground waste sites to be lined. The Alameda Point dump is composed of various unlined cells, or pits, where all manner of aircraft parts and maintenance chemicals and debris were dumped, along with waste material from the luminescent dial and marker painting that used radium-226.
The Navy’s work plan includes a security fence and tall PVC pipes to vent methane gas. Golden Gate University’s Center on Urban Environmental Law (CUEL) has been following open space planning at Alameda Point and offered comments on the proposed security fence and the 10-foot tall soil gas vents. With collaboration from UCLA’s Landscape Architecture Department they created two composite drawings illustrating the stigmatizing effect that a fence would have on this wild open space with the Bay and San Francisco skyline in the background. The Navy has proposed the fence, even though the newly seeded clean soil cap will be safe to walk on. Protection of the soil, gas vents, and monitoring equipment was the reason given for the fence.
The law group also secured the help of Pangea Environmental Services to investigate the necessity of the security fence and obtrusive gas vents. Pangea interviewed city employees and other personnel responsible for oversight of four closed Bay Area landfills that have been converted to open space and recreational uses: Shoreline Park in the City of Mountain View; Sunnyvale Landfill in Sunnyvale; Oyster Point Park in San Leandro; and Cesar Chavez Park in Berkeley. Only the Sunnyvale site has a fence, but the gates are open during the day and allow free access. “The interviewees all reported that they could not recall encountering any vandalism or other damage associated with public use to either monitoring wells/vapor probes, landfill cover materials or landfill gas venting systems during the periods (generally exceeding a decade) for which they had roles in managing the landfills.”
Pangea goes on to say, “[T]he proposed post-construction installation of permanent exclusionary fencing surrounding Site 2 is considered to contradict the ‘open space and recreational use’ land use restriction proposed in the RAWP (Remedial Action Work Plan), since a closed fenced area cannot be considered open space or be used for recreation. [T]here appears to be no technical basis for installation of a permanent exclusionary fence restricting public access to Site 2.”
The City of Alameda pointed to the Record of Decision for Site 2 that specifies certain land use restrictions such as “land disturbing activities,” which would prohibit digging, disturbing monitoring equipment, or building construction. Referring to the proposed fence, the city said that these restrictions “explicitly do not prohibit recreational uses.”
Site 2 (outlined in yellow on map above), comprising 110 acres, lies within the larger 549-acre parcel commonly known as the wildlife refuge in the runway area of the former Naval Air Station. The refuge is home to a nesting site for the endangered California Least Tern, which lies a few hundred yards east of Site 2. The US Fish & Wildlife Service currently manages the refuge and the tern colony. Continuing management of the refuge to protect the terns and their nesting area will mean that a fence and gates will always be necessary around the greater refuge boundaries to limit the introduction of mammals such as raccoons, opossums, skunks, and feral cats that could pose a threat to the terns during nesting season. The perimeter fence will also serve to control human access. Thus, a secondary fence within the refuge would be redundant in controlling access.
Both the US Environmental Protection Agency (EPA) and the Regional Water Quality Control Board (Water Board) called on the Navy to look for alternatives to the fence. The Water Board stated, “Although protection of human health and the environment is our primary goal, we request that alternatives be evaluated for the fence line and methane gas venting so that public concerns and environmental health might more naturally coexist with the other beneficial uses that are planned for the area.”
Landfill gas venting
PVC piping will be installed to vent methane gas created by decay of organic matter. Thirty of the proposed vents will be 10 feet high. However, since the predominant waste is industrial and not organic, the amount of methane produced is minimal. And after more than 25 years, methane production would be expected to be near the end of its life. The Navy’s project manager recently said that the current methane out-gassing is so low that it wouldn’t keep a flame lit if there was a flaring system, calling into question the number of vents required and their height.
The Water Board questioned the gas vents saying, “[I]t is unclear why the methane vents need to be so high.” The EPA, Pangea, and the City of Alameda echoed this concern suggesting that the methane gas venting system could be reengineered into a lower profile system.
The Bay Conservation and Development Commission (BCDC) had similar concerns about shoreline access and the visual experience of future trail users. They also called for more specifics on the overall design, including how the shoreline is suited to withstand sea level rise impacts, and specifics about drainage and other impacts on the wetlands from the new soil cover.
Wetlands connection to Bay
When the Navy extended the size of the base over 50 years ago to create the landfill site, they installed an underground 36” metal culvert that connects the North Pond on Site 2 to San Francisco Bay. Because the aging culvert does not enter the landfill portion of the site, the Navy is not addressing the soundness of the culvert, even though they are addressing wetlands issues at the site. The Navy’s presumed argument is that culvert improvements would be a “land improvement” that is outside the scope of environmental remediation requirements.
Both the Water Board and the EPA are arguing for the Navy to address the culvert issue. The Water Board stated, “We are very concerned about the age and integrity of the culvert that is the sole source of Bay water to the tidal wetlands. It is our understanding that the aged culvert is in very poor shape and may collapse any time. The value of this culvert became painfully apparent a year ago when some driftwood or other material clogged it up and impeded all tidal flow of brackish water to the wetland. In a matter of days the tidal wetland started drying up. Should that culvert collapse, the delays in rebuilding, from getting contracts to actual physical work, could be devastating and even fatal to the wetland flora and fauna.”
The EPA said, “[T]here is no evaluation of the culvert to demonstrate that the culvert is appropriately sized or constructed to minimize the potential for future blockages, nor is there any provision for the periodic inspection and maintenance.” EPA went on to say, “Either the connection to the Bay needs to be reconstructed to reduce the potential for blockage or an obligation to periodically inspect the culvert and clear blockages needs to be included in the Operations and Maintenance plan. The details for the inspection and maintenance should be reviewed with BCDC as part of the Navy’s compliance with the substantive provisions of Bay Plan.”
Further addressing wetlands issues, the Water Board questioned, “Will there be an adequate number of wells effectively placed to monitor landfill leachate concentrations that might adversely affect the adjacent wetland species?”
The hazardous waste pits on the south end of the site come within a few dozen yards of the Bay. The two longstanding concerns about proximity to the Bay have been chemical leaching into the water table, and failure of the seawall during an earthquake along the Hayward Fault. Well monitoring over the past 16 years shows that toxic chemical leaching is not a problem. However, the EPA is questioning the stability of the seawall and the earthen berm that surrounds the landfill containment area.
The EPA said, “It should be noted that based on the presented analyses the seawall along the southern coastal margin which is founded on liquefiable hydraulic fill and coarse-grained Young Bay Mud is prone to edge failure and lateral spreading.” They go on to say, “No remedial actions are proposed in the [Work Plan] to address these issues,” and they continue by saying, “[I]f the seawall is prone to failure and lateral spreading, it is unclear how further lateral spreading will be localized and will not distort the cover and result in depressions, drainage reversals or similar effects. Please address potential edge failure on spreading on southern coastal margin.” They also point out that the soil make-up of the berm around the landfill has not been characterized, leaving another question mark about seismic stability.
The EPA mentions reinforcement options such as “cement deep soil mixing and jet-grouting,” and calls on the Navy to clarify whether they think perimeter slope failure in an earthquake is an acceptable long term risk, in lieu of underground seismic reinforcements. They also point out that the work plan does not analyze consequences of future expected sea level rise.
The Navy has until August 24 to respond to comments and incorporate changes or additions to the plan in their final draft. The regulators and the Navy will meet periodically prior to the August 24 deadline. A 30-day final review by the Navy and regulatory agencies will follow. Work on the site is scheduled to begin on October 1 and be completed by summer of 2013. Completion could be delayed if the seeding of the soil cover cannot be accomplished during the rainy season.
Below is a photo gallery of Palo Alto’s Byxbee Park, which is built over a landfill waste site at the edge of San Francisco Bay. No exclusionary fencing.
“The Navy provided a more current explanation of the future redevelopment of IR Site 2, indicating that even under Department of Veterans Affairs (VA) ownership that IR Site 2 would be a wildlife refuge.”
“[T]he purpose of the multilayer soil cover is to control specific site risk through the prevention of direct contact by either humans or ecological receptors (e.g., burrowing animals).”
January 15, 2008, Minutes from regulatory agency and Navy “Resolution Meeting” on the Feasibility Study for Site 2
Parent osprey landing with fish as fledgling waits on right, with parent looking on.
This is the third year that a pair of ospreys has nested on the old light stand at the entrance to the Seaplane Lagoon. This year’s mating effort produced one fledgling.
As June draws to a close, the fledgling can been seen standing on the nest and going through a series of wing calisthenics as one of the parents looks on. Occasionally a parent will fly in a circle around the nest as if to say, “Look, this is how it’s done. It’s easy.” Spending most of its time hunkered down in the nest, often with brisk winds coming in across the Bay, the fledgling waits patiently for the high points of the day – its parents returning to the nest with a fish. It won’t be long before this osprey family will be winging their way back to the wild.
Fledgling osprey watching and waiting for its turn as parent eats fish.
Fledgling osprey exercising its wings above, while parent looks on.
Above and below – parent osprey appears to be giving flight demo as it circles nest with fledgling looking on.
Parent osprey lifting off from nest as fledgling sits, with other parent looking on. Note juvenile colors and wing spots.
In the southwestern corner of Alameda Point – on the wildlife refuge – are 30 acres of wetlands. They lie within the cleanup area known as Site 2. The wetlands themselves are not contaminated, but due to protracted cleanup efforts and studies elsewhere on the site, the entire area has been off limits since the base was closed in 1997.
In May 2012, the Navy released a draft plan for covering the old underground waste disposal area on Site 2 with clean soil and seeding it with native grasses.The plan also includes a study of the wetlands on the site. Here are some highlights from the wetlands report, and also some photos taken by a Navy contractor a few years ago during investigative work.
The wetland delineation report prepared for the Navy identified three distinct wetland and water features:
Open Water/Mudflat – Open water/mudflat is found in two large ponds, the North Pond and the South Pond.
The North Pond is connected to San Francisco Bay by a 36-inch-diameter culvert that penetrates the perimeter berm and seawall. “The culvert appears to be appropriately sized to allow full tidal exchange on a diurnal basis, as the tidal wetland drains and fills completely twice a day,” according to the report.
Of the South Pond, the report said, “Most of this pond is either shallow standing water or mudflats, with a fringe of pickleweed (Salicornia virginica) forming the transitional plant community between the mudflats and nearby uplands. Freshwater seasonal pond and transitional mudflat habitats such as this have been identified in theBaylands Ecosystem Habitat Goals Project(SFEI 2001) as rare and important habitat components.”
The Navy’s summary of the wetlands report goes on to say, “The South Pond and mudflat matrix is high-value habitat in that it offers high tide refugia for wading shorebirds, and low tide refugia for ducks and geese. Because pond water surface elevations in this area are maintained by groundwater and precipitation, they do not fluctuate on a diurnal basis as they do in the northern (tidal) pond. Since this area normally has both mudflats and open water, it is available as foraging habitat year-round. At the time of the reconnaissance survey in late October , an estimated 500 birds representing at least eight species were observed foraging in this pond and mudflat.”
Seasonal wetlands – One area on the north side of the site is considered low quality and will be covered by the soil cap. The lost wetland acreage will be replaced at other locations on the site. At the south end of the site is another seasonal wetland.
Tidal wetlands are found surrounding the North Pond that is connected to San Francisco Bay.
Even after all the cleanup work is completed, the Navy proposes to put a permanent chainlink fence topped with barbared wire around a scenic shoreline section of the wildlife refuge at Alameda Point.
“Good grief! If a fence is needed, will Site 2 be clean enough for our community?” Leora Feeney, co-chair of the Audubon Society’s Friends of the Alameda Wildlife Refuge, said upon first learning about the fence.
The Navy used the site for underground waste disposal from 1956 to 1978. According to representatives at the U.S. Environmental Protection Agency, the California Department of Toxic Substances Control, and the Regional Water Quality Control Board, the permanent fence has nothing to do with human health risks at the site.
According to the answer that the regulatory agencies provided collectively, “Potential human health exposure is unlikely to occur during recreational use on top of the soil cover such as walking or sitting.” The soil cover will be seeded with native grasses.
The fencing is aimed at reducing maintenance costs for the new landowner, the U.S. Department of Veterans Affairs (VA). “While the fence is not mandatory and recreational use without soil cover disturbance will not pose a risk to human health or the environment, the ongoing management of the protective cover in an area with public use without more direct supervision will increase risks and costs,” representatives from the agencies jointly stated.
The VA’s annual expense for operating, maintaining, monitoring, and compliance reporting for the cleanup site, without added supervision, is pegged at $101,715, according to an advisory paragraph in the work plan. ”There are numerous groundwater monitoring wellheads and landfill gas probes that require security to maintain monitoring integrity,” regulators stated.
The Navy’s plans indicate that access to the shoreline trail will remain open. But according to the regulators, “The perimeter road should have gates. This concern will be clarified with the Navy.”
The security fence, which will be inside the fenced off refuge area, departs from longstanding expectations for the refuge. Ironically, the off-limits wetlands area at this site is showcased on an Audubon Society brochure about the refuge. Docent and ranger-led bird watching and nature walks have been part of the expected uses at the wildlife refuge since the mid-1990s.
By 1998, the US Fish & Wildlife Service had drafted its guiding document for creating the Alameda National Wildlife Refuge. It envisioned supervised activity. It was to be run in the same manner as other refuges, with controlled and monitored use, two law enforcement officers, and a cooperative agreement with the East Bay Regional Park District “to augment [Fish & Wildlife] Service efforts.” Talks between the Fish & Wildlife Service and the Navy collapsed around 2004 over cleanup issues.
The shoreline restrictions imposed by the fence and gates are also at odds with the San Francisco Bay Plan, which is administered by the San Francisco Bay Conservation and Development Commission. While permits are not required for federal projects, the official “Record of Decision” for this cleanup site states that plans will be in accord “with substantive provisions of the San Francisco Bay Plan.” One of the keystones of the Bay Plan is maximum feasible shoreline public access. “The city is discussing the provisions of remedial design for Site 2 with the Navy to support a future perimeter trail around the shoreline of the fed-to-fed parcel, which the city is strongly committed to,” said Jennifer Ott, Chief Operating Officer for Alameda Point.
Another of the Bay Plan’s guidelines avoids undesirable visual impacts on the shoreline. One of the details in the work plan calls for 30 ten-foot tall, four-inch diameter, white PVC soil gas vent pipes for methane gas. This array of pipes will be visible from the outside seating areas behind beverage purveyors on Monarch Street such as St. George Spirits. “The city and Navy will discuss ways to minimize the visual impact of any new and/or replacement pipes, including the possibility of reducing their height,” Ott said.
Releasing methane into the environment has 21 times the greenhouse gas impact as burning it and turning it into carbon dioxide. The city currently burns off the methane gas produced at the city’s old municipal dump, Mt. Trashmore.
Public comments on the draft Remedial Action Work Plan for Site 2 will be accepted by the Navy until Monday, July 9. Responses to comments and a finalized plan will be announced in August. A copy of the plan is available in the information repository in City Hall West, 950 West Mall Square at Alameda Point. A rare opportunity to visit the site will take place on Saturday, June 23, when the Navy hosts the annual site tour. To comment, or to sign up for the tour, contact the Navy’s Environmental Coordinator Derek Robinson at email@example.com.
Site 2 details
The 110-acre cleanup site lies on the southwestern corner of Alameda Point within the 549-acre wildlife refuge, and includes 30 acres of wetlands and the 60-acre disposal area.
Remedial work at the site is expected to commence in the fall of 2012 and be completed by summer 2013. As a base layer for the soil cap, the Navy will use some 75,000 cubic yards of soil that it dredged from the Seaplane Lagoon and deemed clean enough for reuse. The Navy will then barge between 400,000 and 600,00 cubic yards of clean soil from Decker Island in the Sacramento River near the town of Rio Vista. The Navy says this will save at least 22,000 semi-truck trips.
The work plan document allays longstanding fears about underground toxic chemicals leaching into the Bay. According to groundwater monitoring results in 2011, and comparing them to 16 years of data, all chemicals of concern are below risk levels and either stable or trending downward. The plan includes the option of eliminating the groundwater monitoring wells in five years.
“Overall, the Navy believes that the soil cover remedy for IR Site 2 is directly compatible with the anticipated future reuse of the site.”
The California Least Terns are arriving back at Alameda Point’s wildlife refuge to lay their eggs and raise their young. The volunteers, who help maintain the site, and the US Fish & Wildlife Service (USFWS) biologist responsible for the tern colony, have never left. They carry out maintenance tasks during the non-nesting season – September to early April – as well as help monitor bird behavior during the nesting season.
The California Least Terns return to California every April from Central America. The old Navy runway area at Alameda Point is among the limited number of sites where these endangered birds come to nest. Driven to adapt to a loss of undisturbed beach habitat, they began nesting at Alameda Point decades before the Naval Air Station closed in 1997.
While Navy jets would be disturbing for humans to live next to, for the terns the movement of the jets was predictable and easy to avoid. That’s not the case on an increasing number of beach areas where people and pets can easily trample eggs in the sand and frighten the adult birds.
The Alameda Point colony is considered the most successful for this bird. It is believed that the success at Alameda Point has led to new colonies elsewhere in California.
Volunteers are recruited by the Friends of the Alameda Wildlife Refuge, a committee of the Golden Gate Audubon Society. Activity at the Least Tern nesting site started ramping up in January this year as it always does, with guidance from the USFWS biologist. Volunteers perform tasks such as removing weeds, repairing the mesh barrier that keeps chicks from wandering off or getting injured in the chain link fence around the nesting site, and distributing oyster shells to confuse hawks and other flying predators that often circle overhead during the nesting season.
Every year the US Fish & Wildlife Service re-positions all of the numbered cinder blocks that establish a grid pattern for recording bird behavior. The blocks, along with all the other “tern furniture” – wooden A frames and clay tile that chicks shelter under and in, oyster shells, driftwood – are gathered up and set to the side after the nesting season. This allows for easier weed control and for the sand and gravel surface to be graded.
The grid blocks are placed into position using a global positioning system for complete accuracy. When Tern Watch volunteers or the Fish & Wildlife biologist observe activity, they record the data according to a grid letter/number. Without a grid system, it would be difficult to record accurate data for hundreds of eggs and chicks, i.e., did a predator steal an egg last night, or is that the nest that had only one egg?
The public is invited to take a bus tour to the site on June 16th. The annual event is hosted jointly by USFWS and the East Bay Regional Park District. The bus tours leave from the Crab Cove Visitors Center in Alameda. Advance registration is required and is handled through the park district. (See comment below.)