The short and plain version
- A frac job pumps sand, water, and chemicals into a well at very high pressure. The spread is loud, fast, and packed with heavy equipment.
- There are two kinds of danger. The fast one is the high-pressure gear and lines. They can fail hard and hurt or kill in a second.
- The slow one is silica dust. Frac sand is mostly silica. Breathing the fine dust harms the lungs a little more each shift.
- Silica disease, like silicosis, can take years to show up. By then the harm is usually permanent.
- Federal rules limit how much silica dust a worker can breathe. They tell the company to control the dust, measure it, and warn you.
- A silica case can sometimes be filed years after the work. So a delay does not always mean the case is gone. Answers cost nothing.
1. What a frac job is, and the hazards on the spread
A frac spread hits you first as noise and motion, a wall of trucks and pumps and lines moving sand and water into the ground at pressures that can kill in an instant. But there is a second danger on that location that does not announce itself at all. It is the dust, and it works slowly, one breath at a time.
This page is about both dangers, because a frac hand lives with both, every single stage, every single day.
Let me back up and say what a frac job actually is, in plain words. After a well is drilled, the company still has to get the oil and gas to flow out of the rock. So they pump a mix of water, chemicals, and sand down the well at very high pressure. The pressure cracks the rock deep underground. The sand wedges into those cracks and holds them open so the oil and gas can come up. That is the whole idea. The industry calls it hydraulic fracturing. Everybody on location calls it fracking.
"Hydraulic fracturing," or "fracking," is pumping water, chemicals, and sand into a well under very high pressure to crack the rock and let the oil and gas flow. The sand props the cracks open. It takes a lot of sand. Each stage of a modern frac job can use hundreds of thousands of pounds of it.
To pump all that, the company brings in a small city of equipment and parks it on the pad. That whole setup is the spread.
The "frac spread" is all the equipment and crew on location for the frac job. Pump trucks lined up in a row, a blender that mixes the sand and water and chemicals, sand movers and sand trucks feeding the blender, high-pressure iron (the steel pipe and connections) running from the pumps to the wellhead, data vans, and the hands who run all of it. It is loud, it is fast, and there is no slow part of the day.
So you have got two very different kinds of danger sharing one location. One is fast and obvious. The other is slow and silent. Most of the safety talk on a pad is about the fast one, and it should be, because it can kill you before you finish a sentence. But the slow one has killed plenty of workers too. It just does it years later, long after everyone has moved on to the next pad, so nobody connects the funeral to the job.
2. The fast danger: high-pressure equipment and lines
Start with the danger you can see.
A frac job runs at pressures most people cannot picture. The pumps push fluid through steel lines at thousands of pounds per square inch. When that system holds, it does its job. When a connection fails, or a piece of iron is worn out, or something is hooked up wrong, the release is violent. A line can whip. A connection can come apart like a bullet. A worker standing in the wrong spot does not get a warning.
OSHA, the federal workplace safety agency, lists these as real and known hazards on a frac site. Its guidance for oil and gas work names being struck by high-pressure lines or an unexpected release of pressure, from things like mismatched or worn hammer unions and line failure, right alongside getting caught in pinch points like hammer union wings, hammers, and pump iron. These are not freak events. They are the predictable results of running high-pressure equipment hard, and they are the reason the work has rules.
"Iron" is the crew's word for the steel pipe, fittings, and connections that carry frac fluid from the pumps to the wellhead. "Hammer unions" are the connections that get hammered together to join two pieces of iron. When iron is worn, cross-threaded, or the wrong pressure rating for the job, it can fail under pressure. That is one of the most dangerous things that can happen on a spread.
Here is the part that matters for a case. When a high-pressure failure hurts somebody, it is almost never bad luck. Somebody was supposed to inspect that iron. Somebody was supposed to pressure-test the lines before the job. Somebody was supposed to pull worn equipment out of service and keep people out of the red zone (the danger area around pressurized lines) while the pumps were running. When one of those things did not happen, the injury traces back to a choice a company made, usually to save time or money, and usually made by someone who was nowhere near the iron when it let go.
A high-pressure equipment failure is often its own injury case, separate from anything to do with dust. If that is what happened to you, the questions are who owned and maintained the equipment, who was running the job, and what the inspection and testing records show. Those records exist. The trick is getting to them before they disappear.
3. The slow danger: respirable silica dust
Now the danger nobody talks about at the safety meeting.
Frac sand is not ordinary sand. It is mostly crystalline silica, and when you move it, dump it, and blow it around a location all day, it throws off a fine dust. Some of that dust is so small you cannot see it hanging in the air, and that is exactly the dust that hurts you, because it is small enough to ride all the way down into the deep part of your lungs and stay there.
"Crystalline silica" is a mineral found in sand and rock. "Respirable" means small enough to breathe deep into your lungs. So "respirable crystalline silica" is the fine, often invisible silica dust that gets past your body's defenses and lodges in the lungs, where it does permanent damage over time. Frac sand is largely crystalline silica, which is why moving it generates this hazard.
The federal government studied this exact problem on real frac sites, and what it found should have changed the industry overnight. The National Institute for Occupational Safety and Health, NIOSH, is the government’s research agency for worker health. Its researchers went out to eleven hydraulic fracturing sites across five states, including Texas, and collected 116 air samples off the workers actually doing the job. They called silica the most significant known health hazard to workers during hydraulic fracturing. Read that again. Not one hazard among many. The most significant one they knew of.
What the government found in the dust on frac sites. NIOSH collected 116 personal air samples at 11 hydraulic fracturing sites in 5 states, including Texas. It found:
- 47% of the samples were over the OSHA legal limit in effect at the time.
- 79% were over the stricter level NIOSH itself recommends to keep workers safe.
- 31% were more than ten times the recommended limit. One sample was more than a hundred times over.
- NIOSH warned that at those levels, even a worker wearing a common half-mask respirator would not be protected, because that kind of respirator is only rated to cut exposure by about ten times.
The same study did something else that matters. It named exactly where the dust comes from on a spread, seven specific points: the thief hatches on top of the sand movers, the side fill ports during refilling, the transfer belts, the blender hopper where the sand drops in, the dragon’s tail at the end of the sand belt, and the plain dust kicked up by truck traffic on the pad. Those are not mysteries. NIOSH found the sources, and then it published the fixes: dust collectors, enclosures, curtains, better equipment design, water on the roads, monitoring, and training.
So the industry has known where the dust is and how to control it for over a decade. When a worker is still eating that dust with no controls in place, that is not a gap in the science. It is a company that decided the fix was not worth the money.
A "sand mover" is the machine that stores frac sand on location and feeds it to the blender. A "thief hatch" is an access port on top of it. When sand gets loaded while the machine is running, called "hot loading," dust pulses up out of those hatches and fill ports right into the air the crew is breathing. NIOSH found these to be among the biggest dust sources on a spread.
4. What silica does to the lungs over time
Here is the cruel part. Silica dust does not hurt when you breathe it. There is no cough that day, no burning, no warning. The damage is quiet and it adds up, and by the time a worker feels it, it has usually been building for years.
What the dust does is scar the lungs. The body cannot clear those tiny silica particles, so it walls them off, and over time the scar tissue builds until the lungs get stiff and cannot move air the way they should. That disease has a name.
"Silicosis" is the lung disease caused by breathing respirable crystalline silica. The dust scars the lungs permanently. It is incurable, meaning there is no cure that undoes the damage, but it is preventable, meaning the exposure that causes it never had to happen. It can leave a worker short of breath doing things that used to be easy, and in bad cases it can be fatal.
Silicosis comes in three forms, and the difference between them is mostly how hard and how long you were exposed. Government health agencies describe them this way. Chronic silicosis is the most common, and it usually shows up after ten or more years of exposure to lower levels of dust. Accelerated silicosis comes on faster, often after five to ten years, when the exposure was heavier. And acute silicosis can hit after only weeks or months when the dust was extremely heavy, filling the lungs with fluid and causing severe illness or death in a short time. The frac dust levels NIOSH measured, ten and a hundred times over the safe limit, are the kind of heavy exposure that drives the faster, worse forms.
A "latent disease" is one that stays hidden for a long time before symptoms appear. Silicosis is a latent disease. A worker can breathe the dust for years, feel fine, leave the oilfield, and only later find out the damage was being done the whole time. This matters for your legal rights, because Texas law has special rules for injuries that take years to show up. More on that below.
And silicosis is not the only thing the dust can do. The federal silica rule itself, the law that sets the limits, requires companies to warn workers that respirable crystalline silica can cause cancer, lung effects, immune system effects, and kidney effects. That warning is written into the regulation. Silica is classified as a cause of lung cancer, and it is linked to other serious lung and kidney disease on top of silicosis. This is why a serious silica case is not a simple case. It usually takes real medical experts, doctors who can look at the lungs, read the imaging, and tie the disease to the dust, to prove what the exposure did.
If you spent years on frac spreads and you are now short of breath, coughing, or you have been told you have a lung problem, it may be worth a conversation, even if nobody ever handed you a diagnosis with the word "silica" on it. There is no charge and no pressure, and I will be straight with you about whether there is anything here worth looking into.
Call or text (210) 460-05695. The safety rules on silica and frac operations
The dust is not a legal gray area. There is a specific federal rule, and it applies to frac work.
OSHA’s respirable crystalline silica standard, 29 CFR 1910.1053, sets a hard legal ceiling on how much silica dust a worker can breathe. That ceiling is called the permissible exposure limit.
A "permissible exposure limit," or PEL, is the most of a hazardous substance the law lets a worker be exposed to, measured as an average over an 8-hour day. For respirable crystalline silica, the PEL is 50 micrograms per cubic meter of air, averaged over 8 hours. The rule also sets a lower "action level," 25 micrograms, and once a workplace hits the action level the company has to start doing something about it: measuring the air and protecting workers.
The rule does more than set a number. It tells the company what it has to actually do, and this is where most silica cases live. Under the standard, an employer has to assess the exposure, meaning actually measure the dust for workers who may be at or above the action level. It has to use engineering and work practice controls, the dust collectors and enclosures and wet methods, to bring the dust down, and it can only fall back on respirators where those controls are not enough. It has to write and follow an exposure control plan. It has to offer medical exams, at no cost to the worker, to people exposed at or above the action level for 30 or more days a year. And it has to train workers on the hazard, post warning signs, and include silica in its hazard communication program.
There is one wrinkle that matters for frac work specifically, and it is worth knowing. The silica rule set special deadlines for the oil and gas industry. Most of the rule’s duties kicked in for hydraulic fracturing back in June 2018. But the deadline to put in the engineering controls, the actual dust-control equipment on the sand movers and belts, was pushed to June 23, 2021. So for frac operations, there has been no excuse on the equipment side since the summer of 2021. The obligation to control the dust at the source is fully in force.
"Engineering controls" are fixes built into the equipment or the worksite that cut the hazard at its source, like a dust collector on a sand mover or a curtain that keeps dust from blowing into the crew. The law prefers them over respirators, because a respirator only works if it fits, it is worn every second, and the dust is not too heavy for it. NIOSH found frac dust so heavy that respirators alone were not enough. That is why the controls matter.
There is also a piece upstream of the well site, at the mines and plants where frac sand is produced and loaded. Those operations answer to a different agency, the Mine Safety and Health Administration, MSHA, which regulates mine dust. MSHA finalized its own tougher silica rule for mines, but as of mid-2026 a federal court has put a hold on parts of it while the case is litigated, and mine operators are being held to the older mine dust limits in the meantime. The short version: the sand that shows up on your location started in a dusty place too, and the rules governing that side of the supply chain are in flux right now. It is one more reason these cases can involve more than one company.
6. Who is responsible
This is the question everybody actually wants answered, and the honest answer is that it depends on who made the dangerous choices, and there is usually more than one company in the picture.
Think about how many companies touch a frac job. The operator owns the lease and hired everybody. The pressure pumping company, the frac company, runs the spread and usually employs most of the hands. There is often a separate company that supplies and hauls the sand, and another that runs the sand movers or the dust controls if anyone bothered to bring them. There are equipment makers who built the iron and the sand-handling gear. On a bad day, the choices that hurt a worker can trace back to any one of them, or several at once.
For the fast danger, the high-pressure failure, the questions are about equipment and supervision: who owned the iron, who was supposed to inspect and test it, and who was running the job when it let go. For the slow danger, the dust, the questions are about controls and monitoring: who was responsible for keeping the dust down, whether anyone ever measured it, and whether the crew was ever warned or trained the way the law requires.
Now, you may have heard that you cannot sue the oil company. There is a Texas law behind that, and it is real, but it is not the whole story.
"Chapter 95" is a Texas law that can make it harder to sue the property owner, often the operator, when a contractor's worker gets hurt doing work on the property. It is a serious obstacle, but it is not a wall. It has two specific exceptions. Its protection runs mainly to the property owner, though a contractor higher up the chain can sometimes claim the same protection against a lower-tier subcontractor's employee. It does not automatically protect every company on the spread. The sand haulers, the equipment makers, and anyone else who made a dangerous choice outside that chain are a separate question. And even where the law applies, its two exceptions can still open the door. How that law works, and the two ways past it, is covered in its own guide: the Chapter 95 guide.
So “you cannot sue the oil company” is, at most, half true, and often not true at all. Even where Chapter 95 protects the operator, it does nothing for the companies outside that protected chain whose choices put dust in your lungs or worn iron in your face. Figuring out the full chain of companies, and which law applies to which one, is one of the first jobs in any frac injury case.
Frac silica cases are expert-heavy cases. Proving what the dust level was, what it did to a set of lungs, and which safety rules got broken usually takes industrial hygienists (air-exposure scientists), safety engineers, and medical specialists like pulmonologists (lung doctors) and sometimes oncologists. A high-pressure equipment case can also need a mechanical or metallurgical expert to show why the iron failed. What each of these experts does, and why the right ones matter, is covered in the guide to experts in oilfield injury cases (coming soon).
If you worked frac and you are worried about your lungs, or you were hurt when a line or a piece of iron let go, you do not have to figure out who is responsible on your own. That is my job, not yours. Call me and I will walk through it with you, plainly and at your pace, and tell you straight what I see. The conversation is free and private.
Call or text (210) 460-05697. What this means for you and your family
Here is the plain version of everything above.
If you worked frac in Texas, you lived with two dangers. One could hurt you in a second. The other has been working on your lungs quietly, and it may not have shown itself yet. Both of them are things the companies were supposed to control, and both of them are covered by real safety rules.
If a high-pressure line or a piece of iron hurt you, that is often its own case, and the records that prove what went wrong start disappearing fast. If your lungs are the problem, silica disease can take years to appear, so a diagnosis today can trace back to dust you breathed a long time ago.
And here is the part that surprises people. Because silica disease is a latent disease, Texas law does not always start your legal clock on the day you left the oilfield. In these kinds of cases, the clock can start later, when a reasonable person would have known both that they were sick and that the sickness was likely tied to the work. So a delay does not automatically mean your case is gone. It also does not mean you can wait. It means the timing is its own question, and it needs a careful look, early.
You do not have to decide anything today. But answers cost nothing, and waiting quietly only ever helps one side, and it is never the worker.
A short, plain summary of how Texas courts and Texas law treat these claims. This is legal background, not a prediction about any specific case.
- The clock on a hidden disease. Childs v. Haussecker (Tex. 1998) was a silicosis and asbestos case, and it set the rule for a hidden disease. The two-year clock does not start until the symptoms are bad enough, or last long enough, that a reasonable person would know he is hurt. He also has to know, or with reasonable effort should know, that the work likely caused it. Knowing the exact name of the disease is not required. Neither is a final diagnosis. A mere hunch, on its own, usually is not enough to start the clock. The flip side is real too. A worker who ignores clear signs and never looks into them can lose the delay.
- Two years, and where it starts. Texas Civil Practice and Remedies Code section 16.003 sets the general deadline at two years for a personal injury claim, and two years from the date of death in a death case. The discovery rule above is what decides when that two-year clock actually begins in a latent disease case.
- A second, different disease can get its own clock. In Pustejovsky v. Rapid-American Corp. (Tex. 2000), the Court held, in the asbestos context, that a worker who earlier had a claim for one disease can still bring a later claim against a different company when a separate, distinct disease later develops from the same exposure. The later disease can start its own limitations clock when it shows up. Worth knowing: the Texas Supreme Court limited this rule to asbestos-related diseases. It has not yet decided whether the same rule applies to silica.
- You have to prove the dust did it. Borg-Warner Corp. v. Flores (Tex. 2007) and Bostic v. Georgia-Pacific Corp. (Tex. 2014) set the causation bar in Texas asbestos cases. They require evidence of the dose and proof that the dose was a substantial factor, not just "some exposure." Texas courts have applied that same framework by analogy in other toxic-dust cases, including silica cases. But the Texas Supreme Court has not yet issued a silica-specific causation ruling. Either way, the worker has to show, with real evidence, roughly how much dust he breathed and that the dose was a big factor in the disease. The science has to be reliable. That is a real hurdle, and it is why these cases need the right experts and the exposure records.
- Texas has a special rule just for silica claims. Chapter 90 of the Civil Practice and Remedies Code requires a person bringing a silica injury claim to serve a detailed medical report from a qualified, board-certified physician, based on a real exam and a full history, before the case moves forward. For a silicosis claim, that report also has to show at least a Class 2 level of lung impairment. For a silica-related lung cancer claim, it has to show at least fifteen years between the first exposure and the diagnosis. It is a gatekeeping rule meant to sort serious claims from paperwork. The practical takeaway: you will need a good doctor's workup, and a lawyer who knows this rule exists.
The plain takeaway: silica cases turn on the medicine and the exposure records, and they run on deadlines that work differently than a car wreck. Both the medicine and the records take time to build, and both start slipping away early.
8. Questions to ask any lawyer you are considering
You do not have to take anybody’s word, including mine. A frac injury case, especially a lung case, is too important to hand to the first billboard you see. Test any lawyer you talk to.
- Ask whether they have handled toxic-exposure or occupational lung cases, not just car wrecks, and whether they work with experienced co-counsel on the heavy ones.
- Ask how the deadline works for a disease that took years to show up, and what the discovery rule means for your situation specifically.
- Ask what they know about the OSHA silica rule and Chapter 90's medical report requirement, because a lawyer who has never heard of either is not ready for this case.
- Ask which companies besides the operator might be responsible, and how Chapter 95 affects each of them.
- Ask what experts a case like yours needs, and whether the firm can bring in the right industrial hygienist and the right doctors.
- Ask what they will do this month to preserve the exposure records and the equipment before it is repaired, scrapped, or lost.
- Ask how the fee works, what expenses the firm covers up front, and who at the firm you will actually talk to.
A lawyer who knows this work will not be bothered by any of those questions. A lawyer who gets weird and defensive about them just answered the most important one.
If you want help, here is how to get it.
The consultation is free, and there is no fee unless your case recovers. We can talk by phone, or in person by appointment in San Antonio. The conversation is confidential, there is no obligation, and nobody will rush you.
Call or text (210) 460-0569Or use the contact form on this page.
For the ones who keep going.
Common questions
What is silica, and why is frac sand dangerous? +
Silica is a mineral found in ordinary sand and rock. Frac sand is mostly silica. Moving huge amounts of it on a spread throws off a fine dust. The dangerous part is the dust too small to see, called respirable crystalline silica. It goes deep into the lungs and stays there. Over time it scars the lungs and can cause serious, lasting disease.
What is silicosis? +
Silicosis is the lung disease you get from breathing silica dust. The dust scars the lungs and makes them stiff. The worker gets short of breath, first during hard work, then during everyday things. There is no cure that undoes the scarring. But it is fully preventable, because the exposure never had to happen. In bad cases it can be fatal. Silica is also tied to lung cancer and kidney disease.
How long does silica disease take to appear? +
It depends on how heavy the dust was. The most common form, chronic silicosis, usually shows up after ten or more years. Heavier exposure can bring it on in five to ten years. Very heavy exposure can cause a fast, severe form in just weeks or months. Because it is often slow, a lot of workers do not tie the disease to the job until years later.
What are the OSHA limits on silica? +
OSHA's silica rule, 29 CFR 1910.1053, caps how much dust a worker can breathe. The limit is 50 micrograms per cubic meter of air, averaged over an 8-hour day. There is a lower action level of 25. Above that level, the company has to measure the dust, control it with real equipment, offer medical exams, and train and warn workers. For frac work, the deadline to install that dust-control equipment was June 23, 2021. There is no excuse on that front now.
Can I still bring a claim years after the exposure? +
Sometimes, yes. Texas has a two-year deadline. But for a disease that takes years to appear, the clock does not always start on your last day in the oilfield. In a silicosis case, the Texas Supreme Court said the clock can start later. It starts when a reasonable person would know both that he is sick and that the work likely caused it. So a delay does not automatically kill the case. It also does not mean waiting is safe. The timing is its own question, and the proof fades. Get it looked at early.
Who is responsible for a silica injury? +
It depends on who made the dangerous choices. It is often more than one company. It could be the frac company that ran the spread with no dust controls. It could be the operator, a sand supplier, the company in charge of monitoring, or an equipment maker. A Texas law called Chapter 95 can make a claim against the property owner, or sometimes a higher-tier contractor, harder. It does not reach every company on the spread, and it has two exceptions. Sorting out the full chain is one of the first jobs in the case.
What about a high-pressure equipment failure? +
That is usually its own case, apart from any dust issue. When a high-pressure line or a piece of iron fails and hurts someone, the questions are simple. Who owned and maintained the equipment? Who was supposed to inspect and pressure-test it? Who was running the job? The inspection and testing records usually tell the story. But they start disappearing fast, so saving them early matters a lot.
Keep reading
Hydrogen Sulfide (H2S): The Invisible Danger on Texas Oilfields
H2S is the invisible oilfield poison that can kill in two breaths. Here is what exposure does and what your rights are after it.
Part 12Struck-By and Caught-Between Injuries: The OSHA Fatal Four on Texas Oilfields
Struck-by and caught-between incidents are the leading on-site oilfield killer. Here is how they happen and who can be held responsible.
Part 18Statute of Limitations and Notice Requirements in Texas Oilfield Cases
Miss a deadline and a good case is over before it starts. Here are the Texas filing and notice deadlines for oilfield injury claims.