Standards
CSLB #1136510
OSHA Compliant
Fully Insured
Everything outside the building, one contractor
Contained, recovered, disposed of properly, and documented
Contained
Drain inlets are covered and sealed before any water touches the surface, so nothing enters the system while we work.
Recovered
Runoff is vacuumed back and held on site rather than allowed to run to the curb line.
Disposed of
Water goes to sanitary sewer or is hauled off, decided by what the surface carries and what the local water board requires.
Documented
You receive the disposal record with the job photographs, which is what an inspector asks to see.
You will know what
Protecting the properties that keep Southern California running

Licensed California contractor #1136510
Licensed, insured, OSHA-compliant crews working to documented stormwater practice on every visit.
Consistent Service Across Southern California
Commercial pressure washing, window cleaning, concrete cleaning, and storm-drain maintenance across Southern California’s commercial and multi-site environments.
Clean is an outcome.
Control is a system.
One agreement across every property, a written record of where the water went, and the paperwork your approval process asks for.
Client experiences from real sites
“I reached out to PowerWashCo last minute for drain cleaning services, and I couldn’t be happier with the outcome… Not only did they efficiently vacuum the hazardous oil residue and clear the flooded storm drain, they also pressure wash our gas station that night.”
“We needed our 7-11 gas station’s gas island and canopy cleaned, and we came across PowerWashCo on Google. After reading the reviews, I decided to take a chance on them, and I’m glad I did… I highly recommend PowerWashCo for your cleaning needs.”
“We had an issue with water draining in the trench drain and a clogged pipe preventing water to drain to the street at our dealership… Responsive, attended a last minute call, convenient to work with and makes sure you are satisfied.”
Common questions
What property managers ask before the first visit
What does a site evaluation cover?
A usable scope names every surface, the square footage, and the method to be used on each one, because concrete, painted stucco, glass and roofing cannot take the same pressure. It should also state the working hours, how wash water will be contained and disposed of, who supervises the crew, and what you receive afterwards as a record. If a quote does not name the method per surface, it is a price, not a scope.
On top of that, it should offer clear, actionable advice and steps to turn your goals into reality. To guide you toward the best decisions, a good plan will also lay out a variety of potential scenarios—plus some alternative ones—for you to consider.
Can you work while the property is open?
Yes, and for most commercial sites it is the only workable option. Retail centers, restaurants and medical buildings are cleaned outside trading hours, and distribution sites are cleaned between shifts. We agree the access window during the walkthrough, confirm gate and key arrangements in writing, and schedule the crew against it. Where a site cannot close at all, we phase the work section by section so the property stays open throughout.
How do you handle wash water?
Wash water from a commercial site is not allowed to enter the storm drain. We block the drains before work starts, recover the runoff, and dispose of it to sanitary sewer or by haul-off depending on what the site produces and what the local Regional Water Quality Control Board requires.
Surfaces carrying oil, grease or heavy metals are treated as contaminated runoff and handled separately from general rinse water.
Reclaim equipment is standard on our trucks, not an extra line on the quote.
You receive the disposal record with the job photographs, which is what an inspector will ask for.
Who is on site, and are they employees?
Yes. One supervisor owns your account, walks the site, writes the scope and is on site with the crew. For multi-site portfolios the same supervisor covers every location, so the standard does not drift between properties.
Recent work
Dated photographs and a disposal record close every visit. A sample of recent jobs is in the gallery.
See recent work