LABORATORY REPORT
ENVIRONMENTAL TESTING LABORATORY
Jl. Laboratorium Lingkungan No. 123, Jakarta
Phone: (021) 555-1234, Email: info@env-lab.co.id
ACCREDITED KAN: LP-001-IDN
INDEKS SUHU BASAH DAN BOLA (ISBB) MEASUREMENT REPORT
REPORT NUMBER: LHU/ISBB/05/2024/001
Based on Permenaker No.5 Tahun 2018
1. CLIENT INFORMATION
| Client Name | PT. Indonesia Steel Manufacturing |
| Address | Jl. Industri Baja No. 75, Cikarang, Bekasi |
| Contact Person | Ir. Adi Nugroho (HSE Manager) |
| Request Number | REQ/2024/05/002 |
2. MEASUREMENT INFORMATION
| Measurement Date | May 12, 2024 |
| Measurement Time | 10:00 - 14:30 WIB |
| Measurement Officers | Ahmad Kusuma (Sampling Officer), Budi Santoso (Technical Analyst) |
| Weather Condition | Sunny, 33°C (outdoor temperature) |
3. EXPLANATION OF WORK LOAD CATEGORIES
According to Permenaker No.5 Tahun 2018, work loads are categorized as follows:
- Light Work: Activities that require 100-200 Kcal/hour energy expenditure, such as office work, control room operation, light assembly work.
- Moderate Work: Activities that require 200-350 Kcal/hour energy expenditure, such as moderate lifting, pushing, or pulling tasks, walking at moderate pace.
- Heavy Work: Activities that require 350-500 Kcal/hour energy expenditure, such as intensive manual labor, heavy lifting, shoveling, digging, etc.
| Work Allocation | Light Work (°C) | Moderate Work (°C) | Heavy Work (°C) |
|---|---|---|---|
| 75% - 100% Work | 31.0 | 28.0 | -- |
| 50% - 75% Work | 31.0 | 29.0 | 27.5 |
| 25% - 50% Work | 32.0 | 30.0 | 29.0 |
| 0% - 25% Work | 32.2 | 31.1 | 30.0 |
4. MEASUREMENT RESULTS
| No. | Location | Work Type | Work Category | Work-Rest Allocation | Temperature (°C) | ISBB Value (°C) | ISBB Standard (°C) | Compliance Status | ||
|---|---|---|---|---|---|---|---|---|---|---|
| Dry (Ta) | Wet (Tnw) | Globe (Tg) | ||||||||
| 1 | Furnace Operation Area | Furnace monitoring and control | Moderate | 75% work, 25% rest | 32.5 | 27.8 | 35.6 | 29.7 | 28.0 | NOT COMPLY |
| 2 | Cold Rolling Mill | Machine operation and material handling | Moderate | 75% work, 25% rest | 30.1 | 25.2 | 31.5 | 26.8 | 28.0 | COMPLY |
| 3 | Steel Casting Section | Heavy manual casting tasks | Heavy | 50% work, 50% rest | 33.2 | 28.4 | 36.8 | 30.2 | 29.0 | NOT COMPLY |
| 4 | Welding Section | Manual welding tasks | Moderate | 50% work, 50% rest | 29.5 | 24.6 | 31.0 | 26.1 | 29.0 | COMPLY |
| 5 | Production Control Room | Monitoring and administrative tasks | Light | 75% work, 25% rest | 28.6 | 23.8 | 29.2 | 25.2 | 31.0 | COMPLY |
Notes:
- ISBB (WBGT indoors) = 0.7 Tnw + 0.3 Tg
- Ta = Dry bulb temperature, Tnw = Natural wet bulb temperature, Tg = Globe temperature
- Measurement conducted at 1.1m height (standing worker's breathing zone)
5. MEASUREMENT METHOD
| Parameter | Method | Equipment | Calibration Status |
|---|---|---|---|
| ISBB (WBGT) Index | SNI 7062: 2019 | WBGT Meter Extech HT30 SN:EX55667788 | Valid until June 5, 2024 |
| Dry Bulb Temperature | SNI 7062: 2019 | WBGT Meter Extech HT30 SN:EX55667788 | Valid until June 5, 2024 |
| Wet Bulb Temperature | SNI 7062: 2019 | WBGT Meter Extech HT30 SN:EX55667788 | Valid until June 5, 2024 |
| Globe Temperature | SNI 7062: 2019 | WBGT Meter Extech HT30 SN:EX55667788 | Valid until June 5, 2024 |
6. NOTES AND RECOMMENDATIONS
Based on the measurement results, the following findings and recommendations are provided:
- Two areas (Furnace Operation Area and Steel Casting Section) exceed the ISBB threshold limits according to Permenaker No.5 Tahun 2018.
- For the Furnace Operation Area with ISBB of 29.7°C (exceeding the 28.0°C limit for moderate work with 75% work allocation), it is recommended to:
- Adjust work-rest allocation to 50% work, 50% rest to comply with the 29.0°C threshold for moderate work
- Improve ventilation and heat controls in the area
- Provide personal cooling garments for workers
- Increase frequency of breaks in cool rest areas
- For the Steel Casting Section with ISBB of 30.2°C (exceeding the 29.0°C limit for heavy work with 50% work allocation), it is recommended to:
- Reduce work allocation to 25% work, 75% rest or implement job rotation
- Install additional heat shields near heat sources
- Install additional local exhaust ventilation or spot cooling
- Provide adequate cool drinking water and electrolyte replacement
- Implement a heat acclimatization program for new workers
- Cold Rolling Mill, Welding Section and Production Control Room have ISBB values below the threshold limits and are in compliance.
- General recommendations for all areas:
- Ensure regular maintenance of ventilation systems
- Provide training for workers on heat stress recognition and first aid
- Conduct regular medical surveillance for workers in hot environments
- Monitor ISBB values during peak hot season
7. REGULATION REFERENCES
This measurement report refers to:
- Peraturan Menteri Ketenagakerjaan Republik Indonesia Nomor 5 Tahun 2018 tentang Keselamatan dan Kesehatan Kerja Lingkungan Kerja
- SNI 7062: 2019 regarding Work Climate Measurement Methods
- ACGIH (American Conference of Governmental Industrial Hygienists) Threshold Limit Values for Heat Stress
*END OF REPORT*
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