职业暴露评估策略 · 情景应用 | Exposure Assessment Strategy · Scenario in Action

本课目标 | Learning objectives

1. 按三步走完一个场景，并说出每一步的依据
2. 区分「更有效」与「更先做」两类答案
3. 把结论写回自己的术语表

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场景走一遍 | Walk the scenario

审计发现你厂噪声暴露评估有三个漏洞：①「冲压车间 86 人」只测了 3 台冲床旁的定点读数（82/84/79 dBA），据此写「全车间低于行动级」；②SEG 表里只有「冲压工」一个组；③上一次监测是 4 年前。OSHA 行动级 85 dBA（8 h TWA）。

An audit finds three holes in your noise assessment: for a stamping shop of 86 people only three area readings beside presses (82, 84, 79 dBA) support a 'below action level' claim; the SEG list holds a single 'stamping operators' group; the last survey was four years ago. The OSHA action level is 85 dBA 8-hour TWA.

1. 第一步：拆 SEG——按工种×任务×设备把 86 人重分：冲压工（A 线 500t）、冲压工（B 线 200t）、上料/下料工、模具维修、行车工；材料与任务不同，暴露结构不同。定点 3 个读数只覆盖 A 线局部，不能代表 86 人 — Step 1 — rebuild SEGs: split the 86 by trade, task and machine — press operators on the 500-tonne A line, on the 200-tonne B line, feeders and unloaders, die maintenance, crane drivers. Three area readings cover a corner of line A, not 86 people
2. 第二步：补呼吸带个体采样——每组至少 3–6 人全班次个体噪声剂量计（挂肩），按 8 h TWA 计算；定点仪继续放着作源强参照。预期风险：冲压属典型 88–96 dBA 工种，个体读数大概率越行动级 — Step 2 — personal dosimetry: three to six workers per SEG wear full-shift dosimeters on the shoulder, judged as 8-hour TWA; keep area meters as source references. Expectation: stamping typically runs 88 to 96 dBA, likely over the action level
3. 第三步：判定与听力保护启动——若个体 TWA ≥ 85 dBA：一年内启动听力保护计划（基线听力图 6 个月内、年度复测、培训、发护具）；≥ 90 dBA 则工程控制（隔声罩/消声器）进预算。同步写制度：监测周期 1–2 年、变更即测，弥补 4 年空窗 — Step 3 — judge and start the program: at or above 85 dBA TWA, launch hearing conservation within a year — baseline audiograms within six months, annual tests, training, protection issued; at or above 90 dBA put engineering controls in the budget. Write the cycle into policy: survey every one to two years and on change, closing the four-year gap

走完这三步再往下答题；答案不是背出来的，是按步骤推出来的。/ Work the three steps before answering — the answer is derived, not recalled.

情景自测 | Scenario check

考点应用Exam-point application

这道题考什么：考定点替代个体的审计判定。
Tests area-for-personal audit findings.

用 3 个定点读数代表 86 人的暴露，审计上最核心的缺陷是？

What is the core audit defect in representing 86 workers with three area readings?

自编练习题，不是 BCSP 官方真题，也不能用来预测分数。 / Original practice item, not an official BCSP exam question.

动手练 | Practice

1. 给自己厂写一份「噪声评估整改三步」备忘。
Write a three-step noise assessment remediation memo.

学习打卡与笔记 | Progress & notes

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可靠来源 | Official references

BCSP — CSP Examination Blueprint (CSP11)

BCSP — Official Self-Assessments

BCSP — Certified Safety Professional (CSP)

Pearson VUE — CSP 考试预约 / Scheduling

本课为一般性学习资料，不替代现场专业评估、法规要求或组织程序。/ Educational content only.