Proper Venting for Washer in Bathroom Group (repost correct forum)

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N. Calif
Slab floor, single story, Northern Calif. If I vent the toilet through a 2" vent on the shower arm, am I then free to vent the vanity and washing machine through a combined 3" stack (3 " drain stack, 3x3x2" santee for washer trap arm, 3x3x1.5" santee for vanity trap arm, 3x3x3 cleanout (not shown), reduce to 1.5" vent, 1.5x1.5x1.5" santee for washer revent. Is setup below good with UPC? (Note - due to a large footing on the 2x6 wall I don't just want to do the washer separate from the Bathroom Group). Thanks.
Bath Drains.jpg
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