Raw water quality testing report in the field

Contexts in source publication

Context 1

... quality testing was conducte for nine days. Quality test results of raw water, clarifier, filter, and water production samples are listed in Table 1, Table 2, Table 3, and Table 4, respectively. ...

Context 2

... results of calculation of the value of risk can be seen in severity criteria in Table 11 and Table 12. Causes a decrease in the performance of the functions of the unit , and the effect on the presence of total coliform in water production 3 61-80% ...

Context 3

... residual chlorine risk with 60 % risk value fits into 3 rd rank with the criteria of the seriousness impact can cause a decreasing performance of unit functions and affect the presence of total coliform in water production as well as the criteria of the seriousness of the environmental conditions, water produced still meet the standards set, but influencing disinfection unit performance. Severity assessment results can be seen in Table 13. ...

Context 4

... is the calculated frequency or the cumulative number of failures that can occur (Amada, 2014). Scale occurance determination criteria can be seen in Table 14. Examples Chlorine Residual risk severity ratings as follows: Residual Chlorine range value = 0,19 mg/l Range Value = 0,11-0,34 Frequency = 9 events The calculation result of the risk value seen in the Table 14 are Chlorine Residual risk is at 5 th rank with a risk events probability often occur. ...

Context 5

... occurance determination criteria can be seen in Table 14. Examples Chlorine Residual risk severity ratings as follows: Residual Chlorine range value = 0,19 mg/l Range Value = 0,11-0,34 Frequency = 9 events The calculation result of the risk value seen in the Table 14 are Chlorine Residual risk is at 5 th rank with a risk events probability often occur. Occurance assessment results can be seen in Table 15 ...

Context 6

... Chlorine Residual risk severity ratings as follows: Residual Chlorine range value = 0,19 mg/l Range Value = 0,11-0,34 Frequency = 9 events The calculation result of the risk value seen in the Table 14 are Chlorine Residual risk is at 5 th rank with a risk events probability often occur. Occurance assessment results can be seen in Table 15 ...

Context 7

... is measuring the ability to control failure that probably occur (Amada, 2014). Scale detection determination criteria can be seen in Table 16. A Higher risk level means the control method has lower ability to detect a failure risk, causing a very high probability of very high frequency of failure risk event. ...

Context 8

... average value of chlorine residue = 0,19 mg/l The range value = 0,11-0,34 Frequency = 9 events Then the calculation result of risk value is seen in the value range of detection scale criteria based on the risk occurance in the Table 16, then we get the risk of chlorine residue in the 5 th level with a ineffective control or prevention method to detect failure risk event. It caused the probability of a risk to occur is very high and the potential cause of failure happened recurring. ...

Context 9

... caused the probability of a risk to occur is very high and the potential cause of failure happened recurring. The complete result of detection assessment for another failure risk factor can be seen in Table 17. ...

Context 10

... is an analysis of failure potentials in scores, where scores were set by the expert team agreement (Fitria, 2009). Based on the calculation result of RPN number using the Equation 1, failure risks of total Copyright © 2017, TEKNIK, p-ISSN 0852-1697, e-ISSN: 2460-9919 coliform in the water production can be seen in the Table 18. The RPN number in Table 18 is read in the determined scale of risk level in Table 19, to make it easier do the prority of recommended action. ...

Context 11

... on the calculation result of RPN number using the Equation 1, failure risks of total Copyright © 2017, TEKNIK, p-ISSN 0852-1697, e-ISSN: 2460-9919 coliform in the water production can be seen in the Table 18. The RPN number in Table 18 is read in the determined scale of risk level in Table 19, to make it easier do the prority of recommended action. Based on Table 19, it was known that the category of high risk level are the stipulation of chlorine dose and organic substance; the category of medium risk level is residual chlorine; the category of very low risk level are turbidity and pH. ...

Context 12

... on the calculation result of RPN number using the Equation 1, failure risks of total Copyright © 2017, TEKNIK, p-ISSN 0852-1697, e-ISSN: 2460-9919 coliform in the water production can be seen in the Table 18. The RPN number in Table 18 is read in the determined scale of risk level in Table 19, to make it easier do the prority of recommended action. Based on Table 19, it was known that the category of high risk level are the stipulation of chlorine dose and organic substance; the category of medium risk level is residual chlorine; the category of very low risk level are turbidity and pH. ...

Context 13

... RPN number in Table 18 is read in the determined scale of risk level in Table 19, to make it easier do the prority of recommended action. Based on Table 19, it was known that the category of high risk level are the stipulation of chlorine dose and organic substance; the category of medium risk level is residual chlorine; the category of very low risk level are turbidity and pH. Many number of risks happened can not be fixed at once, so determining the highest risk factor is necessary and required an immediate refinement. ...