In the meantime, the tenants had merrily moved on and probably are polluting yet another house - making it unliveable in these times when rental homes are needed so desperately.
My friend sent this letter to her former tenant. I think her words sum up the frustration and powerlessness of so many decent landlords out there:
"Hello Richard*, I thought you would be keen to hear an update on what happened over on the North Shore at the little cottage we entrusted to your care for a short time.
"My daughter, who was to move in, never could and had to make other arrangements with one day's notice after we got the dreaded results that it was contaminated with P.
"We have lost $400 per week rent since that time (March). Got a calculator?
"We have incurred testing costs of around $3500.
"I had to spend a lot of time chasing up the clean-up which was meant to happen while I was away on leave, but of course, did not.
"I missed my June window to have the cottage shifted to Waihi, and God knows when that will happen now as the ground is wet and further decontamination is required.
"We incurred a $15,000 clean-up cost. And there is more expense still to come.
"I spent countless hours organising the tests and clean-up (where do you go when prices vary so wildly and there is so much controversy about cowboys out there)? Then when the tests were done I had to chase up the results as of course, they had the wrong contact details.
"Following the decontamination, I've been informed that the main bedroom has failed the clean-up and looks like all the gib (redone only six years ago) has to be removed and replaced.
"Out went the stove, fridge, switchboard, carpets, curtains, light fittings and all internal doors. Pantry doors also. I have to replace!
"Now, I may be considered rather dense as to why I need to ask this, but what makes anybody think it's okay to do this to someone else's property? Your indulgent, illegal activity of smoking P should surely be put off until one has one's own house to contaminate? I didn't have children until I had a house to put them in. I feel guilty if I return a magazine to the library with a crumpled cover.
"Can you please enlighten me?"
My friend doesn't expect a reply, but I thought it was important to share her part in the cycle of misery P generates.
* Not his real name, although it should be to warn prospective landlords.