deugirtni, BS's septic tank was pumped due to a tip-off to police from a plumber who had previously done work at the property and had found a t-shirt during the course of his work. This was at least three months after William disappeared. The police had to obtain a search warrant to actually have BS's septic tank pumped.
I get what you're saying about the possibility that William may have ended up in a septic tank and it is a thought that we've all considered but IMO that is not the case. The police have stated that the 21 septic tanks in Benaroon Drive were searched to no avail.
You've asked us to supply photos of septic tanks being pumped in Benaroon Drive. You've asked for MSM reports of the same. We can't supply what you ask for and you know that but that doesn't mean to say that this didn't take place. Photos of poo trucks pumping 21 septic tanks in Benaroon Drive is not going to sell newspapers here in Oz, so don't hold your breath for any photos of such. We are heavily reliant on MSM, SM and what the police tell us in regard to William's disappearance and that is all we have to go on. We're not privy to everything the police know in this case and nor are the media. Similarly the police are not obligated to tell the public or MSM what they know or the finer details of their investigation and that includes the full details of pumping septic tanks complete with photos.
If you feel so strongly that the pumping of septic tanks in Benaroon Drive has not been done to support your theory, I suggest you contact Crime Stoppers
https://nsw.crimestoppers.com.au/ and ask the relevant questions you're posing here. It's pointless to continue the debate about the septic tanks on this thread. We don't have the information you require and if and when you do get that information I'm hopeful that you'll share it with us.