Otherwise, if furnace flue is being abandoned because no longer needed, I would require the top be removed and replaced with a domed galvanized metal cap to keep insects and maybe rodents from taking up residence or using it as a nut cache - cost probably about $50-75 additional.
The creatinine levels in both urine and blood are determined and compared. Normal creatinine clearance for healthy women is 88-128 mL/min. and 97 to 137 mL/min. in males (normal levels may vary slightly between labs). Blood urea nitrogen (BUN) level is another indicator of kidney function.
Creatine and Creatinine. Both are found naturally in our body. Itâs the creatinine youâll be interested in if you want to pass a drug test. The level of creatinine in your urine is an indicator of how well your kidneys are functioning. When you drink copious amounts of water in an attempt to flush controlled substances from your system, the sample will have reduced amounts of creatinine.