Sorry to hear about all that harassment by local authorities. Who could have guessed that blix is deadlier than farm fertilizers and Drano (it might well be as bad, but laws and regulations should be consistent if the environmental impact is the same). As for my issues here, my chemist friend suggests that I simply dilute and dispose via a non-septic tank system since my quantities are too small (about 1L in total per month, on average) to justify getting a contract with a waste disposal firm (which she says is a scam in any case)