I just wanted to comment on the post about this location~ The Bayview Dist in San Francisco does not have Ocean Access~ It is on the East side of the city and if there are any "Beaches" it would be the Bay. This area is a known toxic wasteland where back in the day, the slaughterhouses, tanneries, and glue factories set up shop and used the bay as a dumping ground. This area of SF is also well known for high crime. There is however an area where people hike or walk their dogs~ Candlestick Point State Recreation Area that if you look at a map has beach access (bay) but there is No shore~ the water goes right up to a little cliff that has been planted with erosion control grasses. I would disregard this location without more specific info as to where exactly it is located because nobody should go wandering around the Bayview district where stray bullets are a part of everyday living! I am an SF native and just thought it was worth mentioning!
I have not found any glass on SF Beaches since I was a kid although havent looked much in the past 5 or 10 years. I am only referring to Beaches within San Francisco city limits. If anyone else knows or has found sea Glass in SF, please email me at miss415x@gmail.com if you'd share with a native!