The purpose of this study is to determine the risks and hazards in the laboratory, it is necessary to identify hazards, risk assessment and risk control. Laboratories are often found in research and development institutions, service companies, industry and universities. The material laboratory is a place to carry out student practicum activities and conduct research which has a source of danger that can cause work accidents such as chemical explosion, fire, poisoning and ext. Work accidents can be avoided by improving the quality of Occupational Safety and Health (OSH) which is related to the process of doing work safely and working conditions that are safe and comfortable. One effort that can help is to identify hazards and risk assessments so that effective control efforts can be made to increase work productivity and reduce work accidents. Hazard identification is a process that can be carried out to identify all situations or events that have the potential to cause work-related accidents and diseases that may arise in the workplace [1]. Carry out hazard identification to answer the question of what potential hazards can occur or befall the company organization and how it can occur. Hazard identification is the first step in developing OSH risk management and a systematic effort to understand the existence of organizational hazards and is the foundation of an accident prevention and risk control program [2].

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The contribution of construction to natural damage is derived from material retrieval, material processing, material distribution, construction process, land acquisition for buildings and energy consumption in building operations. In addition to causing natural damage at the time of collection, construction activities also generate considerable waste. One of the most discussed agenda to overcome the problem of global warming and construction waste is to promote sustainable construction or often referred to as sustainable construction. In the concept of green construction one of the things to note is the management of waste or waste management. The purpose of this research is to know the type and quantity of the remaining dominant construction materials that arise in the construction project and to examine the impact of the remaining dominant construction materials on the environment. The research sample is consumable material of building construction project in Badung Regency. The methods used for data collection are field observation, interview and questionnaire distribution. Data analysis using quantitative analysis to determine the type and quantity of waste material construction by calculating the waste index and wastage level. Furthermore, the remaining construction material is calculated waste cost to know the amount of cost losses incurred. The result of the research on the variable of waste and the cause of the waste material that occurred in the building project is the addition of work type and structure work is the most dominant variable on the occurrence of waste and the work of rework and repair, slow image revision and distribution and design changes are factors that have impact / the highest influence on the occurrence of waste. As for the type of project material that has the largest percentage as waste is iron screw concrete, plain concrete iron, bricks and ceramics.

Assessment in the learning process in formal education in terms of assessing student competence does not only cover cognitive aspects and affective aspects, but also psychomotor aspects of students. The purpose of this study is to improve student competency and performance based on the development of a performance-based assessment rubric in the practicum conducted at Kupang State Polytechnic. This study involved a large group of students in the wooden practicum at the civil engineering workshop in Kupang State Polytechnic, and carried out in several stages, namely needs analysis, material development, instrument development, drafting of models, instrument testing, and calculation of learning effects. Performance-based assessment in this study uses rubric in assessing student competencies in the civil engineering workshop in terms of cognitive aspects, affective aspects and psychomotor aspects, and then tested the validity of the assessment rubric.Based on the validity test, 35 valid statement items from the 35 items in the performance-based assessment rubric were produced, this was indicated by the Cronbach alpha value equal to 0.981. In the expert trial involving 8 experts in providing assessment, the CVI value = 0.80, which means that the assessment instrument can be used in the trial group. After learning the practicum students have a treatment effect, the results show that there are significant differences in student test results for untreated (using old method) with those treated (using a new assessment tool). The score generally increases by 20.4%. It was concluded that assessment methods that were improved using new instruments could improve students' competence during the workshop. Therefore, it is recommended that this new instrument for assessment be used in future workshops.

Construction projects contribute to the damage to nature, among others, from material extraction, material processing, material distribution, construction processes, land acquisition for buildings and energy consumption in building operations. Besides that, construction activities also produce high enough waste. One of the discussions to overcome the problem of global warming and construction waste is to promote sustainable construction or what is often referred to as sustainable construction. In the green construction concept, one of the things that needs to be considered is waste management. The purpose of this study is to determine construction activities that have the potential to cause the construction material residuals that arise in construction projects and analyze mitigation actions to minimize the occurrence of material waste. The methods used for data collection are field observations, interviews and questionnaires. Data analysis uses qualitative analysis to determine dominant activities as a cause of waste material and mitigation actions that can be done. The results of the study stated that the activity as a potential factor causing potential waste material in building construction projects in Badung regency which most often occurred was "lack of skilled labor" with a mean value of 4.22 while the activity as the causative factor that had the greatest impact on influence was "quality material does not match specifications "with a mean value of 1.51. From the waste risk matrix, it is found that "lack of skilled labor" is included in the category of very high waste risk due to the frequency that often occurs so that it is a very serious disruption to project implementation and corporate finance.