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All Journal Jurnal Penelitian Rumpun Ilmu Teknik Jurnal Sipil Terapan
Olivia Moningka
Politeknik Negeri Manado
Civil Engineering, Building, Construction & Architecture Computer Science & IT Engineering

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Perencanaan Sistem Utilitas Air Kotor pada Proyek (SMP Negeri 4 Tagulandang) Ayulia Taareluan; Sherley Runtunuwu; Olivia Moningka
Jurnal Sipil Terapan Vol. 4 No. 2 (2026): November: Jurnal Sipil Terapan
Publisher : Fakultas Teknik Universitas Cenderawasih

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.58169/jusit.v4i2.1222

Abstract

This study aims to design the wastewater utility system (blackwater and greywater) for SMP Negeri 4 Tagulandang building, which is part of the permanent housing relocation project following the Mount Ruang eruption in Modisi Village, South Bolaang Mongondow Regency. A descriptive quantitative case study method was employed with technical calculations based on SNI 8153:2015, SNI 03-7065:2005, and SNI 2398:2017. User data of 32 people (23 students, 8 teachers, and 1 principal) served as the basis for clean water demand and wastewater generation calculations. Results show blackwater discharge of 960 L/day (0.0444 L/s) and greywater of 320 L/day (0.0148 L/s) with a total peak discharge of 0.145 L/s. Piping network design using the Plumbing Fixture Unit (UBAP) method resulted in Ø4" (110 mm) pipes with 1% slope for blackwater and Ø3" (75 mm) pipes with 2% slope for greywater. The designed separate septic tank capacity is 7.68 m³ with dimensions of 2.77 m × 1.87 m × 1.79 m. The system meets hydraulic requirements and applicable technical standards, ensuring safe and sustainable operation.
Kerangka Analisis Life Cycle Cost Berbasis Kondisi, Umur Layan, dan Nilai Konservasi untuk Perawatan Gereja Cagar Budaya di Tomohon Trivena Agata Ngantung; Debby Willar; Olivia Moningka
Jurnal Penelitian Rumpun Ilmu Teknik Vol. 5 No. 2 (2026): Jurnal Penelitian Rumpun Ilmu Teknik
Publisher : Lembaga Pengembangan Kinerja Dosen

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.55606/juprit.v5i2.7276

Abstract

Heritage churches in Indonesia are usually repaired only after damage becomes visible, and their funding rarely looks beyond one budget year. Indonesian life cycle cost (LCC) studies mostly cover new buildings and investment feasibility, so they say little about how conservation value should shape the timing and type of intervention. This article develops an LCC framework for comparing reactive and preventive maintenance of a heritage church, with Gereja GMIM Sion Tomohon as the reference case. The framework was synthesised from ISO 15686-5, Indonesian heritage regulations, the Burra Charter, and earlier heritage maintenance studies. It links four component assessments (physical condition, remaining service life, conservation value, damage risk) to scheduling rules, two cost scenarios evaluated by net present value over 30 years, a sensitivity test, and a conservation screen. A parametric break-even model shows that, at a 6% real discount rate and a ten-year deferral of major repair, preventive work stays cheaper while its annual cost is below about 1.8% of the major repair cost without damage escalation, and below about 3.8% when waiting raises that cost by half. Damage escalation moved the threshold more than the discount rate did, so field records of damage spread deserve priority.
Co-Authors Ayulia Taareluan Debby Willar, Debby runtunuwu, sherley Trivena Agata Ngantung