Authors - Ida Bagus Dwipayana , Naniek Utami Handayani, Singgih Saptadi Abstract - The global construction sector is under increasing pressure to shift towards sustainable operational models, particularly in heavy materials processing like asphalt production. This study provides empirical, case-studybased insights regarding sustainable procurement practices at the Asphalt Mixing Plant (AMP), run by PT. Jasamarga Tollroad Maintenance in Karawang, West Java, Indonesia. Utilizing six semesters of the Environmental Management Monitoring Effort (UKL-UPL) data from Semester 1 (S1) 2021 to S1 2025, this research assesses the environmental performance of three integrated innovations: (1) a gas-fired burner system substituting for fuel oil, (2) multi-layered noise reduction technologies, and (3) collection and water vapor-based treatment of stone dust to optimize novelty soil fertility systems. Stack emissions analysis found significantly lower levels of CO at 184 mg/m3 and NOx at 212 mg/m3 than Indonesian regulation enables KEP-13/MENLH/3/1995, while ambient air was consistently compliant during monitoring over nine periods. Outdoor sound levels in the upwind and downwind locations were 65.6 dB (A) and 56.8 dB (A), respectively, both below the exposure limit of 70dB(A) specified by SK Men LH KEP-48/MenLH/11/1996, Sensitivity analysis between four fuel-technology scenarios shows a combination approach achieving a 61.9% CO emission index reduction, 55.4% NOX index reduction, and SO2 index is reduced by 78%, relative to diesel fuel basis. This study finds a significant research gap with respect to operationalizable sustainable procurement criteria combining air quality, noise, and waste valorization in an integrated framework at the AMP operational level. The results offer theoretically underpinned and empirically verified procurement criteria, which are directly applicable to the international construction industry, thus advancing green supply chain management, principles of circular economy as well as pathways towards net-zero construction.
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