The Valley’s Contaminated Ground
Any Santa Clarita Valley employer sending a crew onto contaminated ground this fall should be able to prove ten things before the truck doors open, whether the job sits at Castaic’s burning landfill or on the old munitions tract off Soledad Canyon Road. State law already demands most of these checks. Too many companies seem to treat them as paperwork for an inspector, and the inspector often arrives only after someone has been carried out.
The work here isn’t winding down. When Chiquita Canyon’s operator walked reporters through the landfill last year, it had installed hundreds of gas and liquid wells over trash smoldering at roughly 245 degrees, and leachate was pouring out at about ten times the normal rate. Crews will be maintaining that system for years.
The list below runs from the check that shapes everything else down to the records that mostly matter in hindsight. Nothing on it is exotic, which is part of the problem, since familiar steps are the easiest ones to wave through.
1. A Safety Plan Written for This Ground
The site-specific plan comes first, because nearly everything else on this list hangs on it. California’s hazardous waste rule requires a written safety and health plan for each site, kept on the property, with a separate hazard analysis for every task in the work plan. Excavation gets one analysis and drum handling gets another.
A lot of plans flunk a simple test. Swap the site name on the cover for another job’s and ask whether anything else would need changing. If the answer is no, the document was probably written for a filing cabinet, which leaves the crew to discover whatever the boilerplate missed.
The documents a better plan needs are often already on file. A 2024 hazardous materials memo prepared for a proposed housing project on the old Saugus Speedway, next to Whittaker-Bermite, warned that PCE vapor in the soil could reach workers’ breathing zone during excavation. It also found removal records for only three of the property’s five former underground tanks. A plan drafted without that kind of reading is half blind.
Subcontractors should ask for a copy of the plan before they bid. The rule makes the host employer share every hazard it has identified with its contractors, but each contractor still answers for its own people, so a sub that never reads the plan will struggle to blame anyone else.
For hazardous substance removal work, the rule also calls for a pre-job health and safety conference that puts the property owner or contracting agency in the room with the contractor and the crew. When an owner can’t spare an hour for that meeting, crews have reason to wonder what else will get skipped.
2. Training Cards Deserve Suspicion
A wallet card proves someone finished a course. It doesn’t show whether that person ever worked a live site under a supervisor, or whether the certificate lapsed in the spring.
Check each card against the 40-hour HAZWOPER training requirements and then look for the rest of the file. General site workers need the classroom hours plus three days of field experience under a trained supervisor, and an eight-hour refresher every year keeps them current. Supervisors owe at least eight more hours of management training on top of that.
A simple roster makes the checking routine. When it lists each worker’s completion date, field sign-off and refresher due date, a supervisor can catch a lapse before mobilization instead of during an inspection.
Even a spotless file leaves a gap. Under California’s version of the rule, a certified worker who is new to a site still gets site-specific training and supervised field time there before going in. Seasoned hands sometimes grumble about repeating it, but experience can be exactly what convinces people this dig looks like the last one.
Watch the 24-hour cards, too. That shorter course fits workers who visit a site now and then for a limited task and are unlikely to be exposed above legal limits. Anyone who later becomes a general site worker, or has to wear a respirator, needs 16 more hours and two more days in the field.
3. Bump-Test the Gas Monitors Daily
A direct-reading gas monitor is only as trustworthy as its last test. The instrument makers’ trade group revised its guidance in 2010 to call for a bump test or calibration check before each day’s use, and it dropped an older provision that had allowed month-long gaps between checks. A meter nobody tested this morning is closer to a guess than a measurement.
The same guidance recommends another check when a monitor changes hands between workers heading into different conditions, and after one is dropped on a hard surface or submerged. A dated log kept at the charging station lets the next shift see those checks happened. Someone on site should also be able to explain the alarm set points without opening the manual.
Monitoring has to follow the work, too. The rule calls for fresh readings when crews move to a different part of the site or start a different kind of operation, so the numbers from Monday’s survey don’t clear Thursday’s trench. Once soil or containers start moving, the rule adds personal sampling on the workers likely to take the heaviest exposures.
A 2019 case from West Texas shows the cost in detail. A pumper at a waterflood station in Odessa went into a pump house without his personal hydrogen sulfide detector. Federal investigators later found that the station’s own alarm panel wasn’t receiving signals from its sensors either, and they turned up no evidence that his employer required the personal monitor.
He died on the pump house floor. His wife, who drove out looking for him a couple of hours later, died there too.
4. Isolate Every Line Before Anyone Opens a Valve
That same pumper never locked out the pump he was working on, and investigators found it had started automatically while he was nearby. Every line and pump a crew will touch should be isolated and locked out. Before anybody opens a valve, someone should also walk the system and confirm what connects to what.
Chiquita Canyon’s own crew showed how this goes wrong last November. A worker released a valve that wasn’t connected, and more than 7,900 gallons of untreated leachate ran into an unlined ravine. The landfill blamed operator error and, when cleanup trucks couldn’t reach the spill in its steep east basin, planned to let the liquid evaporate. Labels like that often turn out to describe a check nobody was assigned to make.
Verification works best when it’s physical. Each worker should hang a personal lock at the isolation point. After lockout, someone should try to start the equipment, a test that takes seconds and shows whether the isolation actually holds before anyone reaches in.
5. Heat Inside the Suit
Heat climbs this list every summer. Cal/OSHA’s late-August heat advisory warned of temperatures up to 112 degrees in parts of Los Angeles, Ventura and Santa Barbara counties, and it reminded employers that outdoor crews need shade once temperatures pass 80 degrees. For a worker sealed into a chemical suit and a respirator, that threshold starts to look generous.
The same advisory noted that construction and a handful of other industries owe extra protections at 95 degrees, including regular observation for signs of heat illness and effective ways to communicate. Crews in protective suits arguably deserve that treatment whatever their industry code says.
Heat stroke is only part of the damage. Research built on 11 million California workers’ compensation claims found injury risk running 6% to 9% higher on days above 90 degrees than on days in the 50s or 60s, and 10% to 15% higher once it topped 100. Falls and machinery accidents rose along with heat illness.
The lead researcher tied that pattern to what heat does to cognition. On a contaminated site, a heat-addled mistake rarely stays with the person who made it.
Ask for the work-rest schedule written for suit days, then ask who is watching for symptoms when faces are hidden behind masks. The state’s hazardous waste rule treats temperature extremes as a health hazard and expects the protective gear program to account for heat stress. Moving the heaviest suited work to the early morning is one of the cheaper fixes available.
6. Respirators and the Faces Behind Them
California requires a medical evaluation of whether each worker can safely wear a respirator before any fit test happens. The state’s respirator guide for employers spells out that the examining clinician must be told the respirator’s weight and the temperature extremes the worker will face.
The fit test then has to use the same make, model, style and size the worker will wear. It’s repeated at least annually, or sooner after changes such as dental work or an obvious shift in weight.
A crew pulling masks out of a shared bin is a red flag. So is the operator who grew a beard since his last test, because the guide bars facial hair that interferes with the seal whenever a tight-fitting respirator is required.
Cartridges deserve their own line in the plan. Few chemical cartridges carry an end-of-service-life indicator, and the state guide cautions that workers can’t always rely on their senses to detect breakthrough, so most employers need a written change-out schedule. Supplied-air respirators can also ease the heat load, which helps with the suit-day problem above.
7. Who Can Stop the Excavator?
Every job eventually stops matching its plan. When Chiquita began shoring up the landfill’s west toe this summer, its own notice to neighbors rated the chance of excavating into waste as low but possible, and it pointed to an EPA work order covering mitigation if that happened. The risk was at least named ahead of time.
Residents said the effects reached well past the fence line. The west-end buttress excavation drew a joint letter from Assemblywoman Pilar Schiavo and Supervisor Kathryn Barger demanding more protection for nearby residents while the digging went on.
Naming a risk is the easy part. Somebody on the crew needs the authority to stop the excavator when the bucket turns up something nobody listed. That authority probably means little unless a laborer three weeks into the job trusts that a false alarm won’t cost them shifts. Trust like that tends to come from watching a foreman back someone up, not from a policy binder.
Name the person with stop authority at the morning briefing, and agree on a stop signal that works over engine noise and through a respirator. Then write down the first call to make after work halts, so nobody has to improvise it while standing over a strange drum.
8. The Drive to the Emergency Room
The emergency plan should name the nearest medical help and get rehearsed on a regular basis, as the state rule expects. Someone should have driven the route at the hour the crew will be working. It also helps to call the emergency department before the job starts, because a hospital that learns about a contaminated patient when the ambulance pulls in has already lost time.
Before anyone enters, the rule expects employers to know how the site can be reached by road and what outside emergency teams can actually do. A crew working at the back of a canyon may be a long way from the nearest ambulance, and the plan should say how long.
A one-page sheet listing the site’s chemicals should ride along with any injured worker. Emergency staff can usually treat an exposure faster when they know what it was.
9. Decon Comes Before Entry
The decontamination line has to be standing before the first worker crosses into the work zone. The rule is blunt about timing. Decon procedures must be set up and explained to employees before anyone enters an area where exposure is possible. Jobs expected to run six months or longer owe the crew showers and change rooms as well, with the clean side kept apart from the dirty one.
The people hurt by a missing decon line aren’t always on the payroll. When federal researchers sampled 27 cars belonging to workers on a lead-paint bridge job in Connecticut in the 1990s, they found lead in every one. Almost half of the drivers said young children rode with them at least once a week.
The most useful lesson in that study was a surprise. Some of the most contaminated cars belonged to low-exposure staff, including industrial hygienists and security personnel, who often skipped changing or showering before driving off. Decon rules should cover the inspector who ducks in for ten minutes as firmly as the laborer who spends the whole day there.
10. Medical Baselines That Outlast the Job
The baseline medical exam matters longest. Anyone exposed at or above legal limits for 30 days or more a year, or wearing a respirator that often, is supposed to be examined before assignment and, in most cases, every year after, at no cost to the worker. Without a starting point, it becomes much harder to show later what the job did to a body.
The employer also has to give the examining doctor each worker’s duties and expected exposures, which is one more reason the site plan at the top of this list has to be real. Afterward, the employer must obtain the physician’s written opinion on any work limitations and give the worker a copy. It’s worth having that document in hand before the first shift.
Where the Next Crews Will Dig
Contamination around here has a long memory. Soil cleanup at Whittaker-Bermite was declared finished in 2019, yet water officials warned last year that the perchlorate plume under the old munitions site was still growing while a developer planned more than 6,500 homes on the land.
For employers, the next step is small. Before the next mobilization, put these ten items on one page with a name and a date beside each. If a line is still blank on the morning of the job, the trucks should probably wait. Employers who want a second opinion can call Cal/OSHA’s consultation service, which offers free help.
For residents, the same list works as a set of questions. When projects on contaminated land come before the city, it’s fair to ask who will verify worker protection once the grading starts.
Crews will dig those foundations eventually, into ground whose contamination hadn’t been fully mapped as of the last public reports. When they do, how many of these ten answers will anyone be able to put on the table?
