Laboratory Results Interpretation

An accredited laboratory reads your sample under a microscope, identifies each spore by type, counts them, and converts the count to spores per cubic meter of air. It reports the detection limit for the volume sampled, a debris rating that describes how much non spore material was on the trace, and the presence of hyphal fragments. For each indoor sample it assigns a conclusion category relative to the outdoor control. That is the whole product, and the laboratory says so on the sheet: interpretation is the assessor's responsibility.

So what you receive from most testing services is a table. Cladosporium, four hundred and twenty. Aspergillus and Penicillium group, two thousand one hundred. Ascospores, one hundred and ten. One line is highlighted. Nobody tells you that the highlighted group is the most common indoor amplifier in Florida homes, that it was low outdoors that day, that the air handler you asked about reads elevated on the same group in every zone, or that the closet wall with the stain read wet at the meter while the surface looked dry. The table has no story. The interpretation is the story.

It goes organism by organism. For each type the laboratory found, it says what that organism is, where it commonly grows, whether it is one of the types laboratories associate with materials that have been wet for a long time, and whether its presence indoors at that level looks like outdoor air that came inside, which is the normal condition, or like something the building is producing.

It compares indoors to outdoors, type by type, because that comparison is the entire meaning of an air sample. Outdoor spore counts on this coast swing enormously with the season, the weather, and the last rain, and an indoor number is only interpretable against the outdoor number from the same property on the same day. The interpretation says whether your indoor air matches the outdoor profile at similar or lower levels, or whether one type is far above outdoors, or whether a water damage indicator type appeared indoors at all.

It explains why. This is the part no laboratory can write, because the laboratory was never in your building. The interpretation ties the result to the readings taken during the inspection: the indoor humidity and dew point, the moisture meter readings against the dry reference, the thermal pattern on the wall, the condition of the air handler and its drain line, the closet on the exterior wall, the fan that did not move air. If the result points to an indoor source, the interpretation says which source the evidence supports and what to do about it first.

And it states the limits plainly. A spore trap is a few minutes in one location. It counts spores whether they are alive or dead. It does not measure the compounds that make a musty smell. It can miss growth sealed inside a wall that is not releasing spores into the room at that moment. A not elevated result in a house with a wet wall is a favorable data point about the air, not proof the wall is clean, and the interpretation says exactly that when it applies.

It is written for the reader who was not in the building. A buyer's agent who has to explain it to a seller. A landlord who has to decide whether to fix something. A physician who has asked what is in the air of the bedroom. A desk adjuster in another state who has to decide whether the moisture was sudden or gradual. An attorney who will hand it to the other side. Each of those readers needs cause, comparison, and limits stated in plain sentences with the evidence beside them, and each of them will discount a report that overstates what a sample proves.

That is also why Sterling does not use the phrase black mold in an interpretation, does not describe a result as safe or unsafe against a standard that does not exist, and does not connect a finding to any person's condition. The document describes organisms and conditions. What they mean for a person is a physician's call, and the interpretation is written so the physician can make it.

Because a sample without an interpretation is a number with no meaning, and selling the number and then charging to explain it would be the kind of thing this price sheet exists to rule out. The interpretation is the deliverable. The cassette and the lab fee are how it gets produced.

Florida licenses mold assessors and mold remediators separately and prohibits referral fees between them. That independence is what allows the interpretation to say the air is fine, the closet is a humidity problem, and no remediation is needed, when that is what the evidence shows. A document that is allowed to say that is the only kind worth paying for.