"UC Regents strike plea deal in chemistry lab death at UCLA"
July 27th, 2012
Los Angeles Times
Felony charges against the University of California Regents stemming from the 2009 death of UCLA research assistant Sheharbano “Sheri” Sangji were dropped Friday in return for a pledge of comprehensive safety measures and the endowment of a $500,000 scholarship in her name.
“The Regents acknowledge and accept responsibility for the conditions under which the laboratory operated on December 29, 2008,” the agreement read in part, referring to the date that Sangji, 23, suffered fatal burns.
She was transferring about 1.8 ounces of t-butyl lithium from one sealed container to another when a plastic syringe came apart in her hands, spewing a chemical compound that ignites when exposed to air. The synthetic sweater she wore caught fire and melted onto her skin. She died 18 days later.
From the outset, UCLA and chemistry professor Patrick Harran, who is still charged in the case, have cast her death as a tragic accident and said she was a seasoned chemist who was trained in the experiment and chose not to wear a protective lab coat.
In late December, however, the Los Angeles County district attorney’s office charged Harran and the UC Regents with three counts each of willfully violating occupational health and safety standards.
Friday’s agreement, announced at a hearing in Los Angeles County Superior Court, does not affect Harran’s charges. University of California officials said Friday they stood by him and would continue to pay his legal expenses.
Harran was to be arraigned Friday, but that was postponed until Sept. 5 to allow the judge to weigh defense motions, including one this week that alleges the state’s chief investigator on the case, Brian Baudendistel, committed murder as a teenager.
Baudendistel, a senior special investigator for the California Division of Occupational Safety and Health, has denied that he is the person of the same name who pleaded no contest to first degree murder when he was 16.
But Harran’s lawyers said in court papers this week that the district attorney’s office had matched Baudendistel’s fingerprints to the killer’s and that the two share the same birth date. Prosecutors have declined to comment on the allegation or the defense’s motion to quash Harran’s arrest because of it.
The motion contends that the Cal-OSHA investigator is the same Brian A. Baudendistel who, in January 1985 with two accomplices, lured Michael Myer from a bar in the Northern California town of El Dorado to a remote area to rob him of $3,000 worth of methamphetamine. As he rolled up on his motorcycle, Myer, 26, was killed by a shotgun blast. Another teenager admitted to being the shooter, but said Baudendistel had supplied the weapon.
And here is an interesting report from Chemical & Engineering News...
"Sheri Sangji case: The limits of oral transfer of knowledge"
by
Jyllian Kemsley
January 25th, 2012
Chemical & Engineering News
As others have also reported, a second Cal/OSHA report has surfaced on the circumstances surrounding the death of University of California, Los Angeles, researcher Sheharbano (Sheri) Sangji from a laboratory fire. The first report, which I covered extensively back in 2009, was the one that led to civil sanctions against UCLA. As is standard in a California workplace fatality, once the civil case was completed, it was turned over to Cal/OSHA’s Bureau of Investigations (BOI) to determine whether it might warrant criminal prosecution. The newly-available report is the one that the BOI sent to the Los Angeles County District Attorney, who filed criminal charges against UCLA and chemistry professor Patrick Harran.
The report paints a pretty damning picture of overall UCLA safety culture at the time of the incident. To quote from the report’s conclusions (report page 90):
Based upon the investigation, it is apparent that the laboratory safety policies and practices utilized by UCLA prior to Victim Sangji’s death, were so defective as to render the University’s required Chemical Hygiene Plan and Injury and Illness Prevention Program essentially non-existent. The lack of adequate lab safety training and documentation, lack of effective hazard communication practices, and repeated failure to correct persistent and repeated safety violations within University labs, were all causal deficiencies that led to a systemic breakdown of overall laboratory safety practices at UCLA.
Much of the report just gives added detail to what was already known about the case or documents conventional wisdom about poor lab safety culture in academia. In one interview, postdoctoral researcher Paul Hurley noted that lab coats were seen as optional rather than required in every academic lab he’d worked in. “That’s how my experience has been pretty much everywhere I’ve been, apart from my current job actually,” the report quotes Hurley. Where does he work now? In industry.
The report does reveal, however, a bit more of how Sangji was supervised and trained. To recap the incident, Sangji was using a syringe to transfer about 53 mL of tert-butyllithium (tBuLi), a pyrophoric substance that ignites spontaneously in air, when the barrel came out of the syringe. The chemical splashed on Sangji, who was wearing neither a regular nor a flame-resistant lab coat, and set her clothes on fire. She was burned on more than 40% of her body and died of her injuries.
The report confirms that Sangji did not handle pyrophoric reagents as an undergraduate or during a few months of work at Norac Pharma. At UCLA, Sangji worked in Harran’s lab. Harran told the Cal/OSHA investigator that he observed Sangji do an initial experiment to gauge her experience and competency... Assuming that the experiment Harran referred to is the first entry in Sangji’s lab notebook–the second is her first tBuLi reaction–the procedure involved working in a glove bag and syringing no more than a few milliliters of air-sensitive, non-pyrophoric material. Although some of the fundamental techniques might have been the same, I think many people would argue that in scale and hazard that first reaction was a far cry from Sangji’s tBuLi experiments....
As for handling tBuLi, Harran reportedly told Sangji to ask Hurley for help. Hurley told the Cal/OSHA investigator that he didn’t follow standard operating procedures or other written protocols; rather, he was trained and in turn trained others by word of mouth.... Hurley also couldn’t recall the specifics of his interactions with Sangji. The way Hurley described handling pyrophoric reagents, however, echos some of what contributed to the lab fire that ultimately killed Sangji:
Hurley said in the interview that “most people…more often than not did not clamp the bottle” and instead held it with one hand while syringing with the other. Aldrich recommends (pdf) clamping the bottle, which leaves both hands free to manipulate the syringe. (Sangji compounded this by using a 60-mL syringe with a short needle, so would have had to tip the bottle up to get the needle into the liquid while trying to handle a large syringe with one hand.)
Hurley said that he always used plastic syringes. Aldrich does not specifically prohibit using plastic syringes, but it does recommend drying syringes in an oven, which effectively means that glass must be used. (Sangji used a plastic syringe. Another postdoc in the lab, Hui Ding, commented that plastic syringes can swell, making them difficult to operate.)
Hurley said that he would use a syringe size as close to the reagent volume as possible. Aldrich recommends using a syringe at least twice the volume of the reagent volume, precisely to guard against taking the plunger out to the end of the barrel. (Sangji used a 60-mL syringe for 50 mL or more of material. Ding knew about the twice-the-volume rule.)
Hurley said that he would physically pull on the plunger to pull up the reagent. Aldrich recommends using low-pressure, inert gas to push the material into the plunger rather than risk pulling too hard on the plunger and drawing in air. (It’s not clear which approach Sangji used. When Harran was interviewed by Cal/OSHA investigators in the civil investigation, he also said that he’d pull on the syringe. Aldrich scientist Mark Potyen has previously told me that plastic syringe plungers can’t be pushed up by low-pressure gas.)
(What’s not addressed in the report is the issue of transferring material by syringe versus a double-tipped needle, or cannula. On the day of the incident, Sangji was supposed to transfer a total of about 160 mL. For that amount, a cannula is the accepted practice rather than multiple smaller transfers. It’s not clear that anyone ever said that to Sangji. Certainly no one told her to read the Aldrich protocol.)
The Hurley interview clearly illustrates the limit of oral transfer of knowledge. As in a game of telephone, what gets passed on can change over time. Written protocols help guard against that. And making lab workers (re-)write protocols that faculty then review helps to ensure that everyone does, in fact, know what they’re supposed to do.
Other points of note: Sangji started in the lab in October, 2008. Hurley left the lab in November. According to the report, on the day of the incident in December, Harran knew that Sangji was planning to scale up the tBuLi reaction but told the investigator that he didn’t know by how much. Harran seems never to have discussed the hazards or use of tBuLi with Sangji.
Around the web today, I’ve seen a couple of people ask why the DA didn’t file charges against Hurley. My guess is that it comes down to the legal statute, California Labor Code Section 6425, which specifies “Any employer and any employee having direction, management, control, or custody of … any other employee.” Harran clearly fits that description–he hired Sangji, directed her work, and was ultimately in charge of his lab. I don’t see that it applies to Hurley, who was not explicitly assigned to supervise Sangji’s work and who was gone from UCLA by the time of the incident.
Last but not least, one caveat about the report: It is basically a summary of what the investigator found. The full package appears to involve five binders of information, which I do not have (nor, as far as I know, does anyone else outside of Cal/OSHA or the DA’s office). When reading the report, I think it’s important to remember that you’re not getting the full interview transcripts and we don’t know what the investigator may have left out. (I tried to get everything back in 2010, but was told that because the report was part of an ongoing criminal investigation, it was exempt from disclosure under California’s Public Records Act....
No comments:
Post a Comment