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Point Isabel is a
TopoQuest, retrieved July 5, 2008
Point Isabel is a hilltop in the ancient range of hills that also includes Albany Hill, Brooks Island, and the Potrero San Pablo. Rising sea levels following the last Ice Age formed San Francisco Bay and left the point as a rocky promontory joined to the mainland by a salt marsh that flooded at high tides. A large shell midden showed that Native Americans used the site, specifically the Huchiun Indians.Archived El Cerrito Historical Society
Vol. 24, No. 3. 2008, El Cerrito Historical Society, retrieved October 23, 2021 In the 19th Century, Point Isabel was part of the Rancho San Pablo owned by Don Victór Castro whose father received it in a land grant from the Mexican Republic. 2006 at the
Friends of Five Creeks After the United States took control of California, Castro was forced to sell much of his land. Minna Quilfeldt purchased 500 acres around this land in the 1850s. Her husband, Richard Stege, used the land to raise bullfrogs and develop a resort. In later years, the land was acquired by the Du Pont subsidiary Vigoret Powder Works of San Francisco, which used it primarily to store explosives. A wharf and railroad spur served the Vigoret site. In the early 20th century, "training walls" were built in this area in order to keep channels open, which resulted in a marsh developing behind these walls. This provided habitats for shorebirds and waterbirds. Around the same time, Stauffer Chemical began making sulfuric acid in the area. This site continued its manufacturing until 1997. Chemicals exposed in this area include arsenic, lead, mercury, benzene, acetone, PCBs, mercury, and many others. In the 1930s, the San Pablo Avenue Sportsmen’s Club used Point Isabel for fishing and duck hunting. During World War II, the Navy used Point Isabel as a shooting range. The original hilltop, significantly higher than the present elevation, was dynamited for development in the 1950s. The rubble was used to fill marshlands, widening the point and connecting it to the mainland. A dump for industrial waste filled tidelands north of the original point, separated from it by a tidal channel draining Hoffmann Marsh. This area became known as "Battery Point" because of the large number of batteries buried there. Industrial uses from pesticide manufacturing to waste oil recycling, as well as a pistol range, left the land north and east of Point Isabel among the most polluted brownfield sites along San Francisco Bay, although some of these have been remediated. In recent years, part of the original point, Hoffman Marsh to the east, and later Battery Point were acquired by the East Bay Regional Parks District for its Point Isabel Regional Shoreline, and also by the State of California for its Eastshore State Park. .
by Grant Marek
SF Gate
Dec 30, 2020, access date October 23, 2021 The Technical Porcelain and Chinaware Company (TEPCO) was founded in 1918 and grew substantially until the death of its founder, John Pagliero, in 1968. During the span of these fifty years, TEPCO discarded their broken dishware along the banks of Point Isabel. Point Isabel served as a dumping ground for lead-filled battery casings, thus creating toxic emissions from within the soil.Silva, Spencer. “Leaking Lead Found at Point Isabel.” ''Www.Oaklandmagazine.Com'', 3 Oct. 2018, https://www.oaklandmagazine.com/leaking-lead-found-at-point-isabel/ . Accessed 6 Nov. 2021. Thousands of tons of soil was removed from this site in the 1970s and 1980s, which was supposed to have resolved the issue. However, in 2018, lead leaks have proved that the job was not entirely completed in the 1970s and 1980s. The source of the recent lead leaks has not been discovered.
promontory
A promontory is a raised mass of land that projects into a lowland or a body of water (in which case it is a peninsula). Most promontories either are formed from a hard ridge of rock that has resisted the erosive forces that have removed the s ...
on the eastern shore of San Francisco Bay
San Francisco Bay (Chochenyo language, Chochenyo: 'ommu) is a large tidal estuary in the United States, U.S. state of California, and gives its name to the San Francisco Bay Area. It is dominated by the cities of San Francisco, California, San ...
in the Richmond Annex neighborhood of Richmond, United States.Topographic mapTopoQuest, retrieved July 5, 2008
History
Point Isabel is a hilltop in the ancient range of hills that also includes Albany Hill, Brooks Island, and the Potrero San Pablo. Rising sea levels following the last Ice Age formed San Francisco Bay and left the point as a rocky promontory joined to the mainland by a salt marsh that flooded at high tides. A large shell midden showed that Native Americans used the site, specifically the Huchiun Indians.Archived El Cerrito Historical SocietyVol. 24, No. 3. 2008, El Cerrito Historical Society, retrieved October 23, 2021 In the 19th Century, Point Isabel was part of the Rancho San Pablo owned by Don Victór Castro whose father received it in a land grant from the Mexican Republic. 2006 at the
Wayback Machine
The Wayback Machine is a digital archive of the World Wide Web founded by Internet Archive, an American nonprofit organization based in San Francisco, California. Launched for public access in 2001, the service allows users to go "back in ...
, El Cerrito Historical Society, retrieved October 23, 2021 Victor Castro named the point for his daughter Isabel. He used it as a landing for boats shipping grain and other articles across the Bay. Castro also built a landing, slaughterhouse, and a hotel on this site.Five Creeks Tales of the Bay ShoreFriends of Five Creeks After the United States took control of California, Castro was forced to sell much of his land. Minna Quilfeldt purchased 500 acres around this land in the 1850s. Her husband, Richard Stege, used the land to raise bullfrogs and develop a resort. In later years, the land was acquired by the Du Pont subsidiary Vigoret Powder Works of San Francisco, which used it primarily to store explosives. A wharf and railroad spur served the Vigoret site. In the early 20th century, "training walls" were built in this area in order to keep channels open, which resulted in a marsh developing behind these walls. This provided habitats for shorebirds and waterbirds. Around the same time, Stauffer Chemical began making sulfuric acid in the area. This site continued its manufacturing until 1997. Chemicals exposed in this area include arsenic, lead, mercury, benzene, acetone, PCBs, mercury, and many others. In the 1930s, the San Pablo Avenue Sportsmen’s Club used Point Isabel for fishing and duck hunting. During World War II, the Navy used Point Isabel as a shooting range. The original hilltop, significantly higher than the present elevation, was dynamited for development in the 1950s. The rubble was used to fill marshlands, widening the point and connecting it to the mainland. A dump for industrial waste filled tidelands north of the original point, separated from it by a tidal channel draining Hoffmann Marsh. This area became known as "Battery Point" because of the large number of batteries buried there. Industrial uses from pesticide manufacturing to waste oil recycling, as well as a pistol range, left the land north and east of Point Isabel among the most polluted brownfield sites along San Francisco Bay, although some of these have been remediated. In recent years, part of the original point, Hoffman Marsh to the east, and later Battery Point were acquired by the East Bay Regional Parks District for its Point Isabel Regional Shoreline, and also by the State of California for its Eastshore State Park. .
Environmental concerns
A portion of Point Isabel, locally known as TEPCO beach, is covered in thousands of pieces of broken ceramic dishware.Why this mysterious Bay Area beach is covered in thousands of broken ceramicsby Grant Marek
SF Gate
Dec 30, 2020, access date October 23, 2021 The Technical Porcelain and Chinaware Company (TEPCO) was founded in 1918 and grew substantially until the death of its founder, John Pagliero, in 1968. During the span of these fifty years, TEPCO discarded their broken dishware along the banks of Point Isabel. Point Isabel served as a dumping ground for lead-filled battery casings, thus creating toxic emissions from within the soil.Silva, Spencer. “Leaking Lead Found at Point Isabel.” ''Www.Oaklandmagazine.Com'', 3 Oct. 2018, https://www.oaklandmagazine.com/leaking-lead-found-at-point-isabel/ . Accessed 6 Nov. 2021. Thousands of tons of soil was removed from this site in the 1970s and 1980s, which was supposed to have resolved the issue. However, in 2018, lead leaks have proved that the job was not entirely completed in the 1970s and 1980s. The source of the recent lead leaks has not been discovered.
Notes
External links
* {{San Francisco Bay watershed Landforms of Contra Costa County, California Landforms of the San Francisco Bay Area Geography of Richmond, California San Francisco Bay