It appears to me that the sink drain is vented with a mechanical vent that is mounted at the top of the stub.
Guess the chief became a cop because he had trouble making it as a plumber.the boy's room also smells funny sometimes. kind of like toilet/ucky smell. but not all the time. it comes and goes. their room is directly behind the kitchen.well behind me where i was taking the pic. well, if you say this drain cannot make me sick that is relieving, but why did the chief say that to me? he said he used to be a plumber and that this was a big no no. i checked out methane gas symptoms and sure enough not kidding i feel exactly what it states, except for the hallucinations, unconsciousness, or death part. so, does it not need venting, at all? there are no vents for the bathroom toilet or sink either. only vent for the whole house is that fan/light in bathroom. and the new cobra ridge vent! something is going on in this house and i don't know what. my 4 year old complians about his head hurting and 'not working right' too. the underneath/crawlspace of the house smells wet like musty too. i know sign of a leak but when my electrician was under there he said there is a smell but he saw nothing leaking. no wet spots. odd. don't know i'm stumped.
I haven't seen any Chinese drywall as it wasn't used in my area. I checked Wikipedia and found this site. ( http://en.wikipedia.org/wiki/2009_Chinese_drywall_controversy )???!!! when did all that drywall come in and recalled? This drywall is new since july 2010 the girl moved in and then moved out in november 1 week after we went to closing on the house. does it stink when you put your nose up to it? i believe it came from home depot. how can i tell? what does it stink like? is it harmful? maybe i should research it.
also how can i tell if the mold guy i talked to is honest? i asked for him to bring along his license and certification to show me when he does come out in the future he said okay.