Everybody relieves themselves of feces and urine. What to do in San Francisco and no bathroom?
When work crews pulled open a broken BART escalator at San Francisco’s Civic Center Station last month, they found so much human excrement in its works they had to call a hazardous-materials team.
While the sheer volume of human waste was surprising, its presence was not.
Once the stations close, the bottom of BART station stairwells in downtown San Francisco are often a prime location for homeless people to camp for the night or find a private place to relieve themselves. Five of nine BART escalators shut down are in downtown San Francisco. Person in charge is BART Chief of Police Rainey (510) 464-7022 krainey@bart.gov  Solutions to human feces in BART stations?
 http://www.sfgate.com/bayarea/article/Human-waste-shuts-down-BART-escalators-3735981.phpÂ
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Perhaps a lock on the doors after hours. JAJ48@aol.com