Asbestos Abatement (C-22) · Lesson 4 of 5

Regulated Area Set-Up: Barriers, Signs, and the 25 Linear / 10 Square Foot Decon Trigger

"Regulated Area Set-Up: Barriers, Signs, and the 25 Linear / 10 Square Foot Decon Trigger" is lesson 4 of 5 in the Asbestos Abatement (C-22) Learning Hub. It opens with "Class I Work Happens Inside a Regulated Area" and works through 5 short steps, then a worked example you can check yourself against.

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Steps in this lesson

  1. Class I Work Happens Inside a Regulated Area
  2. Count the Quantity, Then Apply the 25 / 10 Trigger
  3. Build the Containment
  4. Build the Decon Chain and Run It in Order
  5. Post the Sign Exactly

The worked example in the course applies this lesson to a realistic job in 7 steps, from "Classify the work" through "Compare a smaller job".

What you'll be able to do

  • Explain the main idea of "Regulated Area Set-Up: Barriers, Signs, and the 25 Linear / 10 Square Foot Decon Trigger" in plain language you can use on the exam.
  • Apply this step with confidence: "Build the Containment".
  • Apply this step with confidence: "Build the Decon Chain and Run It in Order".
  • Apply this step with confidence: "Post the Sign Exactly".
  • Test yourself on the worked example and the quick-check quiz inside the classroom.
Regulated Area: 46 Linear Feet Is Over the 25 Linear Foot TriggerDECON CHAIN INTO A CLASS I REGULATED AREACleanroomShowerEquipmentroomREGULATEDAREAENTER: clean room, suit and respirator on, through equipment roomEXIT: wipe off debris, suit off in equipment room (respirator ON),shower, then clean roomWarning sign posted where it can be read before enteringJOB CHECKTSI runs: 18+12+9+7= 46 linear ft46 > 25 lin ft triggerBarriers, 3-stage decon,protective clothingRoom 20 x 15 x 9 ftSurface = 300+300+630= 1,230 sq ft per layer2 layers = 2,460 sq ft(before overlaps)46 linear ft is over 25 linear ft: full decon chain is requiredCRITICAL BARRIERS + HVAC SEALED + CLEAN / SHOWER / EQUIPMENT ROOMSA 22 ft job would use the equipment room or area of 1529(j)(2) insteadSource: 8 CCR 1529(g)(4), (i)(1), (j)(1), (k)(7); Appendix F (two layers of 6 mil recommended)CC
The diagram for this lesson, exactly as it appears in the Learning Hub.

The first steps of this lesson

Step 1: Class I Work Happens Inside a Regulated Area

Title 8 section 1529(b) defines Class I work as removal of TSI and surfacing ACM and PACM. Section 1529(e)(1) requires all Class I, II and III work to be done inside a regulated area. The area must be demarcated so it keeps people out and protects those outside (e)(2), access is limited to authorized persons (e)(3), eating, drinking, smoking and applying cosmetics are prohibited (e)(5), and a competent person must supervise all the work (e)(6) and all Class I work, including installing and operating the control system (g)(4)(A).

Step 2: Count the Quantity, Then Apply the 25 / 10 Trigger

Add up the thermal system insulation in linear feet and the surfacing material in square feet. Section 1529(g)(4)(B) requires barriers on Class I jobs removing more than 25 linear or 10 square feet of TSI or surfacing material, and also on other Class I jobs where you cannot produce a negative exposure assessment or where employees work in adjacent areas. Section 1529(j)(1) uses the same 25 linear or 10 square foot line to require the full decontamination area, and 1529(i)(1) requires protective clothing for Class I removal over that amount.

The remaining 3 steps, the worked example and the quiz are in the course. This is a preview. The full lesson, with the step-by-step explanations, a worked example and a quick-check quiz, is inside the classroom.

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