Prevention FAQ — FMCSR 173.35A: Intermediate Bulk Container Requirements

Across our 13 million inspection records, 173.35A citations are rare—only 3 all-time—making this code rank #2551 of 3,036 FMCSR codes by citation volume. When inspectors do examine intermediate bulk containers, they verify structural integrity, proper labeling and marking, secure closure mechanisms, and compliance with container specifications for the hazmat class being transported. Inspectors will physically inspect the container for dents, cracks, leaks, or corrosion that compromise safety. They also confirm the container is appropriate for the commodity and weight load. Because this violation carries no out-of-service risk in our data (0% OOS rate vs. 31.4% across all FMCSR codes), citations typically result in warnings or minor violations—but hazmat violations are costly regardless. Train your drivers to conduct a visual walk-around of all IBCs before departure, documenting condition with photos.

Your checklist must cover: (1) IBC exterior condition—no dents, cracks, or corrosion; (2) closure system operation and integrity; (3) proper placarding and labeling on all four sides; (4) secure mounting or blocking to prevent shifting; (5) drain and vent caps in place and tight; (6) gaskets and seals intact; (7) weight verification against container capacity; (8) compatibility of container with the commodity (check the manifest). Require drivers to document each item with a checkbox, signature, and timestamp. Because our data shows only 3 citations in years of operation, most fleets are not inspecting IBCs systematically—that's an advantage for you. Make this checklist mandatory and tied to the pre-trip report. Non-compliance with the checklist should trigger equipment removal from service until corrected.

Drivers must carry a complete shipping paper that includes the proper shipping name, hazard class, identification number (UN/NA), packing group, and emergency response information for the commodity. The shipper must also provide a certificate of analysis or test report proving the IBC meets DOT specifications for that hazmat class. Carriers must retain shipping papers, shipper certifications, IBC inspection records, maintenance logs, and any damage reports for at least one year. Keep digital copies indexed by vehicle, date, and commodity. Our data shows 3 citations involved HYDRO PLUS LLC, IMPERATIVE CHEMICAL PARTNERS INC, and CHEMSTATION PHILADELPHIA LTD—all chemical transporters—suggesting documentation gaps are more common in bulk liquid operations. Establish a centralized document management system so inspectors can immediately produce proof of IBC certification and condition verification.

While 173.35A itself has only 3 citations, our co-occurring violation analysis reveals systemic patterns: the most frequently paired codes involve general loading/unloading hazmat violations (177.834A-HMC and 177.834(a), with 3,954 and 3,839 citations respectively), suggesting improper IBC placement or securing during loading is the primary failure mode. The second pattern involves placarding issues (177.817(a) at 2,274 citations, 75.1% OOS rate), indicating drivers fail to mark containers correctly or placards deteriorate in transit. The third pattern is movement of damaged hazmat packages (177.823(a), 1,829 citations)—often paired with IBC issues when containers arrive at inspection already compromised. Root causes: (1) inadequate load-securing procedure; (2) lack of hazmat training on container-specific handling; (3) no pre-trip damage inspection protocol; (4) shipper packing defects not caught by carrier. Audit loading procedures and require hazmat-certified loaders.

After any damage—even minor dents or corrosion—follow this verification protocol: (1) Have a qualified technician conduct a full structural and pressure-test inspection per DOT specifications for the hazmat class; (2) Obtain a written repair report signed by the technician, including before/after photos and the test results; (3) Re-verify labeling and placarding is correct and legible; (4) Confirm the IBC re-certification (some repairs require factory re-certification); (5) Have a supervisor physically re-inspect before vehicle returns to dispatch; (6) File the repair documentation in your carrier maintenance records for at least one year. Do not allow a repaired IBC to carry hazmat until this process is complete. Because our data shows 0 out-of-service citations for 173.35A (indicating most citations are informational), taking repair seriously now prevents escalation to more severe hazmat violations with 75%+ OOS rates.

If your fleet receives a 173.35A citation: (1) Immediately pull the vehicle from hazmat service; (2) Conduct a full condition re-inspection of the cited IBC and all others on that vehicle; (3) Review the driver's pre-trip report and loading documents from the citation date; (4) Interview the driver and shipper to understand how the defect occurred; (5) Audit your last 10 shipments by that driver for similar issues; (6) Review loading procedures with the shipper or loading partner; (7) Update your pre-trip checklist if gaps are identified; (8) Require refresher hazmat training for the driver; (9) Document all corrective actions and file with the citation record. Because only 3 citations exist in our database all-time, this is a rare event—treat it as a critical learning moment. Share findings with your entire safety team so other drivers learn from the mistake.

A 173.35A citation does not result in an out-of-service violation (0% OOS rate in our data), so it will not directly impact your CSA Vehicle Maintenance BASIC score in the way that mechanical failures do. However, hazmat violations are weighted heavily in CSA's Hazardous Materials BASIC, and they trigger FMCSA attention regardless of OOS status. Because 173.35A ranks #2551 of 3,036 codes by citation volume, it is extremely rare—you have a competitive safety advantage if you avoid it. Contrast this with peer hazmat codes: 177.834A-HMC has 3,954 citations with 99.2% OOS rate, and 177.817(a) has 2,274 citations with 75.1% OOS rate. A single 173.35A citation is less damaging than those, but hazmat citations compound quickly if not addressed. Focus your CSA strategy on preventing the high-frequency peer violations by strengthening loading and placarding procedures.

Mandatory training should cover: (1) IBC anatomy—structure, closure types, drain/vent systems, and pressure relief; (2) DOT specifications for the hazmat classes your fleet carries; (3) proper loading and securing to prevent shifting or puncture; (4) pre-trip inspection checklist and required documentation; (5) identifying damage—dents, corrosion, leaks, seal failure—and when to refuse the load; (6) emergency response procedures if a container is compromised in transit; (7) placarding requirements and verification; (8) shipper coordination and what to do if a shipper-packed container looks defective. Require annual refresher training and documented competency checks. Our data shows carriers like HYDRO PLUS LLC, IMPERATIVE CHEMICAL PARTNERS INC, and CHEMSTATION PHILADELPHIA LTD have citations, suggesting specialized chemical-handling training is lacking in some fleets. If your fleet carries any specialty hazmat (liquids, acids, oxidizers, etc.), hire external hazmat trainers to certify your team.

DataQs challenges should be considered only if: (1) the inspector's citation is factually incorrect—e.g., the IBC was not actually damaged, or the damage was pre-existing and documented; (2) the IBC met all DOT specifications and was loaded correctly, and the inspector misinterpreted the regulation; (3) you have objective evidence (photos, shipper certification, inspection reports) that the alleged defect did not exist at the time of inspection. Before filing, consult with your hazmat compliance advisor or legal counsel. However, because 173.35A violations are so rare (3 all-time citations), most citations are legitimate. Focus energy on prevention rather than challenging. Use the citation as proof your system needs strengthening, not as a target for dispute. If you genuinely believe an inspector error occurred, document it thoroughly and file within 90 days of the violation date.

Conduct self-audits quarterly (every 90 days) for any vehicle that carries IBCs or has carried them in the past 12 months. Here's why: our data shows 0 citations in the last 90 days and 0 in the last 12 months—a complete absence of enforcement activity. This indicates either universal compliance or extremely low inspection focus on this code. If your fleet operates hazmat vehicles, the safest assumption is that inspectors could focus on you at any time. A quarterly audit should include: (1) physical condition inspection of all IBCs on each vehicle; (2) review of last 10 shipping papers for completeness and accuracy; (3) driver pre-trip checklist compliance spot-check; (4) review of any damage reports or near-misses; (5) verification of training currency for all hazmat drivers. Document every audit and file results. This creates a demonstrable compliance record if you are ever cited, and helps you identify systemic gaps before an inspection does.