I believe these were from the East Bay Electric Lines, the Seventh Street Line:

Starting at Dutton Avenue and Bancroft in San Leandro, through the neighborhoods of Eastmont (with freight service to a Chevrolet plant), Havenscourt, and Seminary, via Bancroft, Almond Street, then private right-of-way to 90th Avenue, then Blanche Street to 82nd Avenue, then private right-of-way to Ritchie Avenue, then Beck Street to 73rd Avenue, then private right-of-way to Church Street, then Beck Street to 64th Avenue, then private right-of-way to Seminary Avenue, then Bond Street to private right-of-way leading through Melrose and along the SP main line tracks through Fruitvale[9] to 7th Street, then 7th to Oakland Pier.

I got the details from Wikipedia. I am not that smart.