Why Mesothelioma Cases Occur in San Leandro
San Leandro's most significant asbestos exposure site was International Harvester Company, which operated a major West Coast manufacturing and distribution facility in San Leandro for agricultural machinery, trucks, and construction equipment. International Harvester's products used asbestos extensively — in tractor gaskets, brake linings, clutch facings, and exhaust insulation — and the San Leandro facility's buildings were constructed with asbestos insulation, fireproofing, and building materials throughout.
Caterpillar maintained West Coast distribution and service operations in the San Leandro area that handled construction equipment containing asbestos in gaskets, engine components, brakes, and thermal insulation. Workers who serviced, repaired, or rebuilt Caterpillar equipment were exposed to asbestos components as a routine part of their work. Equipment mechanics who replaced asbestos-containing gaskets and brake components without respiratory protection faced particularly heavy exposure.
The 20-to-50-Year Latency Period
Mesothelioma has a latency period of 20 to 50 years. A worker exposed to asbestos at San Leandro facilities in the 1970s may only receive a mesothelioma diagnosis in 2025 or later. This is why San Leandro continues to produce new mesothelioma cases decades after asbestos use was restricted.
San Leandro's industrial character was reinforced by dozens of metalworking, fabrication, and food processing operations along the Davis Street and Doolittle Drive corridors. Ghirardelli Chocolate operated production facilities using asbestos-insulated steam systems and industrial heating equipment. Metal fabricators and machine shops throughout the city used asbestos gaskets and insulation materials as standard components in their manufacturing operations.
San Leandro's dense residential neighborhoods and commercial district, built largely between 1940 and 1975, incorporated asbestos products throughout. Construction tradespeople who built the city's housing stock, the Bayfair Center area commercial developments, and the industrial facilities along the Alameda County waterfront installed asbestos-containing materials in virtually every structure built during these decades.
San Leandro's Asbestos Legacy by the Numbers
International Harvester's San Leandro facility served the entire West Coast agricultural and construction equipment market. Caterpillar's regional operations handled equipment containing asbestos in multiple component systems. San Leandro's industrial corridor concentrated heavy manufacturing employers throughout the postwar era. California allows only 2 years from diagnosis to file a mesothelioma claim — one of the shortest deadlines in the nation. Documenting your asbestos exposure history is a critical first step.

