A
- Air Sampling
- Collection of airborne mold spores with a calibrated pump and spore-trap cassette, analyzed by a laboratory to quantify spore types and concentrations per cubic meter of air. Indoor results are compared against an outdoor baseline sample.
- AIHA-LAP
- American Industrial Hygiene Association Laboratory Accreditation Programs — the accreditation that qualifies an environmental laboratory to analyze mold samples to recognized standards. Mold X uses AIHA-LAP accredited laboratories exclusively.
- Aspergillus
- A common indoor mold genus with hundreds of species, several allergenic. Aspergillus and Penicillium spores are small, easily airborne, and frequently elevated in water-damaged buildings.
B
- Bulk Sample
- A physical piece of material — drywall, carpet, insulation — removed from a property and sent to a laboratory to identify mold growing within or on it.
C
- Chaetomium
- A cellulose-digesting mold genus strongly associated with long-term water damage. Its presence typically indicates chronic moisture rather than a recent event.
- CIRS
- Chronic Inflammatory Response Syndrome — a term used in some clinical settings. Health questions require evaluation by a qualified clinician; environmental inspection and sampling do not diagnose the condition, exposure, or causation.
- Cladosporium
- The most common outdoor mold genus worldwide and a frequent indoor find. Usually benign at outdoor-comparable levels; elevated indoor concentrations suggest an indoor moisture source.
- Clearance Testing
- Another name for post-remediation verification: inspection-time documentation of accessible conditions, moisture status, agreed criteria, and any selected samples after remediation. It does not certify safety, guarantee success, or authorize occupancy.
- Condition 1, 2, 3
- The ANSI/IICRC S520 classification of indoor environments. Condition 1 is normal fungal ecology; Condition 2 is settled spores without growth; Condition 3 is actual mold growth. Remediation aims to return affected areas to Condition 1.
- Containment
- Physical isolation of a remediation work area — plastic sheeting, negative air pressure, HEPA filtration — that prevents disturbed spores from spreading to clean parts of the building.
D–H
- Dew Point
- The temperature at which air becomes saturated and water vapor condenses on surfaces. Surfaces below dew point stay chronically damp — a common cause of closet and exterior-wall mold in Los Angeles buildings.
- ERMI
- Environmental Relative Moldiness Index — a research-derived qPCR analysis of settled dust that quantifies 36 mold species and produces an environmental index. It does not diagnose illness, exposure, toxicity, or causation.
- HERTSMI-2
- A five-species scoring method based on a submitted settled-dust sample. It is an environmental result, not a safety certification, occupancy decision, or medical diagnosis.
- HEPA Filtration
- High-Efficiency Particulate Air filtration capturing 99.97% of particles at 0.3 microns — the standard for air scrubbers and vacuums used during mold remediation.
I–M
- IEP
- Indoor Environmental Professional — an independent, credentialed assessor who inspects, tests, and writes remediation protocols but performs no remediation. Mold X operates strictly as an IEP.
- IICRC S520
- The ANSI/IICRC S520 Standard for Professional Mold Remediation, currently the 2024 fourth edition. The industry-consensus standard governing assessment, containment, remediation, and verification. Mold X works to S520:2024 on every engagement.
- Moisture Mapping
- Systematic measurement of moisture across walls, floors, and ceilings using pin and pinless meters, documented so contractors know exactly which materials are wet and how far moisture traveled.
- MVOC
- Microbial Volatile Organic Compounds — gases produced by actively growing mold, responsible for the characteristic musty odor. A musty smell with no visible mold is a classic sign of hidden growth.
- Mycotoxin
- A toxic secondary metabolite produced by some mold species under certain conditions. Stachybotrys, certain Aspergillus, and Chaetomium species are documented mycotoxin producers.
P–S
- Penicillium
- A widespread mold genus that thrives on water-damaged materials. Often grouped with Aspergillus on air sample reports as 'Pen/Asp' because their spores look alike under a microscope.
- Post-Remediation Verification (PRV)
- Inspection after remediation that documents accessible visual conditions, moisture status, agreed criteria, and any selected samples at that time. PRV does not prove every concealed condition, certify safety, or guarantee future conditions.
- Relative Humidity
- The amount of moisture in air relative to what it can hold at that temperature. Sustained indoor relative humidity above 60% supports mold growth even without a leak.
- Spore Trap
- The standard air-sampling cassette that captures airborne particles on an adhesive slide for microscopic counting and identification of spore types.
- Stachybotrys chartarum
- The greenish-black toxigenic mold commonly called 'black mold.' Grows on cellulose materials kept wet for extended periods. Its spores are heavy and sticky, so air sampling alone can miss it — visual inspection and surface sampling matter.
T–W
- Tape Lift
- A surface sample collected by pressing clear adhesive tape against suspected growth, letting a laboratory confirm whether a stain is mold and identify the genus.
- Thermal Imaging
- Infrared camera scanning that reveals temperature patterns consistent with hidden moisture inside walls, ceilings, and floors. A screening tool always verified with moisture meters.
- Water Activity
- A measure of the moisture available in a material for microbial growth. Materials held above roughly 0.80 water activity can support mold colonization.
- Water Intrusion
- Any unwanted water entering a building — roof leaks, plumbing failures, irrigation, flooding, or condensation. Finding and stopping the intrusion is the first step of every mold investigation.
