Semiconductor & Advanced Manufacturing in Johor: EIA, Fluoride Effluent & High-Voltage Power Compliance Guide

As the global semiconductor value chain is restructured, Senai, Kulai and Iskandar Puteri have been positioned as Johor’s strategic core for advanced semiconductor packaging, precision wafer test and high-tech component manufacturing. The sector falls within the manufacturing and green-economy priorities that the JS-SEZ actively promotes. Semiconductor manufacturing carries an exceptionally high electrical load, and its etching, cleaning and photolithography steps consume large volumes of strong acids, strong alkalis and fluoride-bearing chemicals — placing it under some of the most stringent compliance and entry standards in Malaysia.

Because of their heavy chemical use and higher potential environmental risk, semiconductor wafer fabs, large-scale advanced chip packaging and high-precision substrate plants are typically classified under the Second Schedule of the Environmental Quality (Prescribed Activities) (Environmental Impact Assessment) Order 2015, made under section 34A of the Environmental Quality Act 1974 (Act 127). The project proponent must appoint a highly qualified environmental consultant to prepare a detailed EIA report and submit it to the Department of Environment (DOE) headquarters for review by a panel of experts. Such projects require a 30-day public display to gather feedback from surrounding communities, and construction may begin only after the DOE issues a written EIA Approval.

Semiconductor process effluent is rich in fluoride, mixed acids (such as hydrofluoric, sulphuric and nitric acid) and trace heavy metals like nickel and chromium, and is governed by the Environmental Quality (Industrial Effluent) Regulations 2009 [P.U.(A) 434/2009]. The plant must run a highly engineered industrial effluent treatment system (IETS) with segregated neutralisation and staged precipitation; fluoride is typically removed as calcium fluoride. Standard A applies where the discharge point lies upstream of a gazetted water catchment; Standard B applies otherwise. Where two or more of the listed heavy metals are present, regulation 11 also limits their combined concentration, raising the bar for multi-metal co-precipitation.

Semiconductor plants generate highly acidic or alkaline, toxic and complex waste liquids and treatment sludges, regulated by the Environmental Quality (Scheduled Wastes) Regulations 2005 [P.U.(A) 294/2005]. These must be held in corrosion- and leak-resistant dedicated containers, stored in a purpose-built store with a double bund wall and explosion-proof ventilation. On-site storage is limited to 180 days or less, and accumulation must not exceed 20 metric tonnes without prior written DOE approval. All transfers run through the DOE electronic consignment (e-Consignment) system to a contractor and disposal facility holding the relevant DOE prescribed-premises licence.

Wafer fabrication and packaging are ultra-large electrical-load projects, and under the Electricity Supply Act 1990 (Act 447) the single-line diagram signed by a registered Professional Engineer is submitted to the Energy Commission (Suruhanjaya Tenaga, ST). Following TNB’s Electricity Supply Application Handbook (ESAH), high-load sites are introduced onto the high-voltage distribution network — Johor is one of the few states offering 22 kV distribution. High-tech manufacturers entering the JS-SEZ may also use the Invest Malaysia Facilitation Centre–Johor (IMFC-J) fast track, under which a manufacturing licence for non-sensitive activities can be approved in as little as seven working days.