24 HOURS · THE EAST BAY

Soot indoors with no fire anywhere?

Richmond and Martinez sit beside working plants, and houses there collect soot indoors without ever burning. That changes what a rag test shows, and what a filter has been doing. And which half of the problem a cleaning can reach. Not the other half.

An SOS technician removing the vanity under a bathroom sink in the East Bay
Two counties. One crew. No waiting.

Somebody answers and a van leaves. Looking is on us. CSLB #1131134 · IICRC #70194273

How does it get inside?

Through openings the building has always had.

Nothing about a refinery town needs a broken window.

A house exchanges air constantly: out at the top, in at the bottom, all day.

Under the entry door, along a slider, through the dryer flap, around a frame that settled.

Is refinery soot the same?

Close enough that a surface cannot tell them apart.

Both arrive as fine particles carrying oily compounds, and the oily half is what you smell.

Both settle on the coolest thing in the room and release again once it warms.

The difference is duration. One fire ends. A working plant does not.

How do I tell if I have it?

Run a clean white rag over the top of a door frame.

That ledge never gets dusted, so whatever settled out of the air is still sitting on it.

Repeat it on the intake grille and on the high shelf above the cabinets.

Black on the rag is particle. A yellowish film that moves under your thumb is the oily part.

What is my filter telling me?

Take it out and hold it flat under daylight.

Darkening on the intake face inside a week means the system moved it through the house.

A basic one-inch panel exists to protect the equipment, not to capture particles this fine.

Most of what passed through settled along the duct run and in the cabinet.

Is this a cleaning job?

Often, when the film sits on hard surfaces only.

Launder the soft things, swap the filter, then work the hard surfaces downward.

Lift before you wet. This material sits on the finish, and water welds it in.

A rubber soot sponge does the lifting, worked in one direction and turned often.

When is it not?

When warm weather hands the smell back to you.

  • Discoloration fanning out from a supply vent or across a ceiling
  • An intake grille or filter that darkened within a week
  • Film appearing in rooms nowhere near a door or window
  • Residue that drags under a thumb and wants solvent

Residue that has settled into surfaces and ducting is beyond housekeeping.

That is the work the fire and smoke crews carry.

Which towns does this describe?

Richmond and Martinez, on this list.

Both sit beside working plants, and both hold houses with no fire history at all.

Naming which cities this reaches matters as much as describing what it is.

Spreading the same warning across twenty-four cities would empty it.

Will insurance touch it?

That conversation belongs to whoever wrote the policy.

Smoke appears among the named perils on most homeowners forms.

What that means for your house, your deductible and a background source is theirs to settle.

Nobody on this crew gets a vote there, and treat anybody claiming one carefully.

What can nobody promise?

That the smell will never surface again.

Warmth pulls odor back out of whatever a cleaning missed.

So the day the crew leaves proves very little.

The week the weather turns proves everything.

A refinery town asks more than one page answers; the guides take the rest.

When should nobody clean it yet?

Before it is documented. Wiping first destroys the only evidence you have.

A refinery release is a claim, and a claim runs on photographs taken before anybody touched anything. That order is not ours to set aside.

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