The conditions of the sampling may not have been representative of actual conditions, vapor intrusion is highly irregular by time and within a property, can be influenced by weather/temperature, and the source may have been removed or the contamination may have degraded.  

Warmer temperatures, but slight rain or drizzles every day, made it sprout.Won't bet the actual drainage tube for about 4 weeks, to install the permanent water outlet.The first picture shows two islands with concrete around the sides. 

I get to know of problems at times before the tenant notifies me, e.g. an alert saying "The systems has been calling for heat, but the temperature has dropped by 5 degrees", or summer time, "The system has been calling for cool in the last hr but temperature has risen by 3 degrees", or "High humidity detected" is often a sign of a non-cooling system.

Investment Info:

Single-family residence buy & hold investment in Yuma.

Purchase price: $149,000

Cash invested: $20,000

this house is a 3/2 with an office and laundry room on a corner lot.

...

The HVAC unit is working no more or less by conditioning that space, so long as it's a) not pulling return air from the common space, b) is not reading a thermostat temperature from the common space, and c) not dumping an incredible amount of air into the space (all of which should not be happening regardless).

Hot temperatures inside as well as humidity can also do damage 

The box did state that the product was only good in the temperature range from 50 to 70 degrees but I still felt like I got ripped off.

If its a big cast iron boiler, id consider swapping out for a couple condensing boilers with a 10:1 turn down ratio and install outdoor temperature reset.

.- Tenant agrees to keep the property at a reasonable temperature, leave water connected and leave refrigerator on / cooling.- Tenant pays 1 months rent as a releasing fee.

Turn washer spin speed up to the highest setting because they're unlikely to change it..5 GPM aerator on bathroom faucets1.25 GPM aerator on kitchen faucet1.25 GPM showerhead1.28 gp-flush toilets--I'm only replacing them because they're the horrific 90s toilets that clog CONSTANTLY, as the water savings will literally never pay offNew tub spout diverters because the current ones leak around the edges badlyY-splitter on top load washing machine to connect the washer only to the cold supply (it's not a high-efficiency, so it cleans well at any temperature) Smart thermostat with 74 degrees minimum cooling temp and 71 degrees maximum heating temp until 10 pm, dropping to 68 degrees until 6am Alarms on doors and windows that alert me if either is left open while the heat or AC is onNew windows, because the current ones are single panes in need of heavy maintenance and are already causing problemsPossibly solar screens on two of the windows that get the most light, particularly a west-facing one