The Shop Floor Spill Response SOP

Purpose

A spill on the shop floor is a cleanup job for the first few minutes and an environmental report after that, and the difference is usually one drain. A floor drain or a trench grate at the bay door can carry two gallons of oil or a jug of chlorine out of the building in under a minute, and once it is in a storm sewer it is in a creek. This procedure makes the first person on scene do the same six things in the same order every time: stop, protect the drains, contain, clean, bag, report. It also tells them which drains go where, which is the fact almost nobody in a small shop knows until the day it matters.

Scope

Covers spills inside the shop building and on the apron outside the bay doors: motor, hydraulic and compressor oils, refrigerant oil from a recovered system, pool chemicals (liquid chlorine, dry chlorine, acids) and pesticide concentrates.

Does not cover a spill inside or from a van, which follows 'The Chemical Spill Response SOP for a Service Van'. Does not cover a refrigerant gas release, a fire, or a spill large enough that the first person cannot reach the drains before the product does: those are an evacuation and a 911 call, under the shop's emergency action plan. What goes in each kit is owned by 'Spill Kits: What Belongs in One'; this procedure assumes the kits exist and says how to use them.

Roles and responsibilities

The floor and its drains

Post this map at each kit station. Every shop's is different; the point is that each drain is labeled with where it goes, which is found by reading the building's plumbing drawings, asking the landlord, or dye-testing once with the sewer utility's permission.

 +------------------------------------------------------+
 | CHEM ROOM   |  PARTS ROOM            |  OFFICE       |
 | curbed,     |                        |               |
 | no drain    |                        |               |
 | [S1]        |                        |               |
 +-------------+---+----------+---------+---------------+
 |                 |  WASH    |                        |
 |  SERVICE BENCH  |  AREA    |   TRUCK BAY            |
 |  [S2]           |  (D1)    |                        |
 |                 |   |      |                        |
 |                 | oil/water|                        |
 |                 | separator|                        |
 |                 |   |      |                        |
 |                 | SANITARY |                 [S3]   |
 |                 |  sewer   |                        |
 +=====(D2) trench grate across bay door=====+=========+
           |
       STORM catch basin -> creek
 [S#] spill kit station, each with 2 drain covers
 (D1) floor drain, wash area, to SANITARY via separator
 (D2) trench drain, bay door, to STORM, never anything

The trench drain at the bay door is the dangerous one. It is usually the lowest point of the floor, it is where trucks drip, and in most buildings like this it goes to the storm system with no treatment at all.

Procedure

1. Stop and identify, from where you stand. Look at the container or the label before touching anything. Acceptance: you can name the product and roughly how much is out (a cup, a gallon, a pail). If you cannot read a label, treat it as the worst thing stored in that area. Stop rule: a chlorine smell, a visible vapor, fizzing where two products meet, or anyone coughing or with stinging eyes means leave the area, pull others out with you, close the door behind you, and call 911 from outside if anyone has symptoms. Acid meeting chlorine releases chlorine gas, and no cleanup is worth breathing it.

2. Stop the source if you can do it without touching the product. Set the container upright, turn a leaking pail so the hole is on top, close a drum valve. Acceptance: nothing more is coming out. Wrong looks like a crushed container still draining or a puncture you cannot turn; drop it into the overpack drum or a larger pail from the kit instead of holding it. Hazard: put on the kit's chemical gloves and safety glasses before handling any container that is wet on the outside; pool acid and pesticide concentrate both injure on skin contact.

3. Protect the drains before you contain the spill. Find the nearest drain downhill of the spill on the posted map and seal it with a drain cover from the nearest kit, then seal the next one. Acceptance: cover lying flat with no edge lifted, and nothing flowing under it. If the kit's cover is missing, ring the drain with socks and granular absorbent and send someone to the next kit for a cover; do not leave the drain open while you go yourself. Stop rule: if product has already reached a storm drain, tell the shop manager now, not after cleanup, because a report clock may already be running. Hazard: kneeling at a drain puts your face near the spill; keep glasses on.

4. Contain the edge. Lay absorbent socks around the downhill side of the spill first, then close the ring. Acceptance: a closed ring with the spill no longer spreading, judged by watching its edge for a full minute. Wrong looks like product running under a sock on an uneven floor; add granular absorbent along that edge. Call the shop lead at this point. Hazard: do not step through the spill to reach the far side; walk around it, because oil on a sealed floor is the slip that turns a spill into an injury.

5. Clean by product, using the method that product needs. Acceptance for every type: no visible liquid or residue inside the ring, and a dry pad wiped across the floor comes up clean.

   • Oils, including refrigerant oil: pads and granular absorbent, swept up. Oil from a compressor burnout can be acidic; keep gloves and glasses on and keep it out of contact with skin.
   • Liquid chlorine: an absorbent the SDS lists as compatible with oxidizers, never sawdust, paper or rags, which can heat and ignite once soaked with an oxidizer.
   • Dry chlorine (granular or tablets): sweep with a clean dry broom and dustpan used for nothing else into a clean, dry, closed container. No water, no absorbent, nothing organic, and never into the trash.
   • Pool acid: neutralize with the agent the SDS names (commonly soda ash or sodium bicarbonate), added slowly from the edge in, until fizzing stops, then absorb.
   • Pesticide concentrate: follow the label's spill directions first, then the SDS; inert absorbent, no washing down. The label is the legal document for that product. Stop rule: any product the shop lead cannot identify, or any amount beyond what one kit absorbs, gets a call to the hazardous waste contractor before more is done. Hazard: wear the respirator the SDS names when it names one, under the shop's respirator program; if the SDS calls for one and nobody present is fitted, stop at containment.

6. Bag and label each product separately. Used absorbent, pads and gloves go into heavy bags or the kit's pail, one product per bag, labeled with the product name, date and "spill debris". Acceptance: every bag is closed and labeled before it leaves the ring. Never put oxidizer debris in the same bag or drum as oily absorbent; that combination is a fire in the waste drum overnight. Hazard: lift a full pail with your legs or with two people; wet absorbent is heavier than it looks.

7. Decontaminate the floor and tools. Wipe the area with the cleaner the SDS allows, collecting the rinse with pads rather than flushing it to a drain. Acceptance: no odor, sheen or residue. Remove the drain covers only now, wipe them, and check under each one for product. Wrong looks like sheen under a cover; that drain was reached, and you go back to step 3's stop rule. Hazard: removing gloves inside out is the last chance to keep residue off your hands; wash before touching your face or phone.

8. Restock the kit before the end of the shift. Replace every item used, from the shop's spare stock, and initial the kit's tag. Acceptance: kit contents match its posted list. A kit that cannot be restocked from spares is logged as a finding for the shop manager with a 1 working day due date, and the posted map is marked "S3 short" until it is.

9. Decide on any outside report the same day. The shop manager reads the record and asks three questions: did anything reach a storm drain, the ground or water; did anything reach the sanitary sewer; and does the product's SDS (section 15) or the state's rules require a report for this amount. Acceptance: each answer is written down with who decided it. Oil reaching water, or leaving a sheen on it, is reported to the National Response Center under federal rules; a discharge to the sanitary sewer is reported to the sewer utility under its own ordinance; pesticide spills can carry a separate report to the state pesticide agency in some states. Reporting thresholds and agencies vary by state and product, so the shop keeps its own list of numbers on the map. This is not legal advice; when in doubt, the manager calls the state environmental agency's spill line and asks.

The record this produces

One spill record per event: date, time, location on the map, product and estimated quantity, which drains were covered and whether any was reached, who responded, what was used, how the waste was bagged and where it is stored, the step 9 answers, and the kit restock initials. The shop manager files it with the waste manifests. An inspector or the landlord reads it after a complaint; the shop manager reads a year of them to see where spills keep happening, which is usually one spot with one cause.

Worked pass

Tuesday, 3:40 pm. A tech backing a hand truck catches a 5 gallon pail of hydraulic oil by the bay door; it tips and about 2 gallons spread toward the trench grate, roughly 4 feet away.

• Step 1: label reads hydraulic oil, about 2 gallons out, no odor or vapor. Pass.
• Step 2: pail set upright, nothing more draining. Pass.
• Step 3: kit S3's drain cover bag is empty. Fails. The tech rings the trench grate's upstream edge with two socks and a line of granular, sends the parts runner to S2 for covers, and stays at the grate. Covers arrive in under 2 minutes and are laid over the grate; edge flat, no flow. Oil stopped about 10 inches short of the grate.
• Step 4: ring closed, edge watched for a minute, holding. Shop lead called.
• Step 5: pads and granular, swept; dry pad comes up clean on the third pass.
• Step 6: two bags labeled "hydraulic oil spill debris", into the oily waste drum.
• Step 7: floor wiped, covers lifted, no sheen under either; grate dry.
• Step 8: S3 restocked except drain covers, none in spares. Finding logged, shop manager, due next working day; map marked "S3 short".
• Step 9: nothing reached either drain, nothing outside; no outside report, decided by the shop manager at 4:30 pm. Outside catch basin checked anyway: no sheen.

Read back against the drain rule, the pass held only because the tech stayed at the grate and sent someone else, which is what step 3 says. Had the tech gone for the cover, 2 gallons on a 4 foot run to a storm grate would not have waited.

References

• See related: Spill Kits: What Belongs in One; The Chemical Spill Response SOP for a Service Van.
• See related: Pool and Cleaning Chemical Incompatibility in Storage; How to Write a One-Page Emergency Action Plan.
• The product's safety data sheet (sections 6, 8 and 15) and, for pesticides, the label's spill directions.
• US EPA and the National Response Center for oil discharges reaching water; your state environmental agency and sewer utility for local reporting.