4 Surface water or GWUDI treatment issues CT not met at all times Y N Spikes in raw or filtered water turbidity Y N Alarms and auto shutdowns are not properly set or Y N functioning. 5 Tank(s) storage, clearwell, backwash return: Proceed to section 6 if there are no tanks. Openings in tank roof that rain water can enter Y N Rodents, birds, insects or other unexpected Y N materials inside tank Tank air vents are not properly screened to Y N prevent insects from entering. Hatches or access ladders left unlocked Y N For redwood tanks, signs of birds/animals Y N burrowing or nesting into the tank root intrusion, for underground tanks Y N 6 Distribution system Low pressure transmission lines Y N Dead end lines Y N Interties with non-potable water systems or Y N sources (even if valved off) Any certified backflow prevention devices not Y N tested in the previous calendar year. 7 Sample site and sampling procedures Is there a written sampling procedure and was it Y N followed? Sample sites are not the ones identified in the Y N approved bacteriological sample siting plan. Sample taps are wet, leaking or dirty Y N The sample collector was not properly trained Y N Were sample bottles delivered to the lab in a Y N cooler and within allowable holding time? Is there a seasonal pattern in positive samples Y N when reviewing historical monitoring? 8 Other Y N
4 Surface water or GWUDI treatment issues CT not met at all times Y N Spikes in raw or filtered water turbidity Y N Alarms and auto shutdowns are not properly set or functioning. Y N 5 Tank(s) storage, clearwell, backwash return: Proceed to section 6 if there are no tanks. Openings in tank roof that rain water can enter Y N Rodents, birds, insects or other unexpected materials inside tank Y N Tank air vents are not properly screened to prevent insects from entering. Y N Hatches or access ladders left unlocked Y N For redwood tanks, signs of birds/animals burrowing or nesting into the tank Y N root intrusion, for underground tanks Y N 6 Distribution system Low pressure transmission lines Y N Dead end lines Y N Interties with non-potable water systems or sources (even if valved off) Y N Any certified backflow prevention devices not tested in the previous calendar year. Y N 7 Sample site and sampling procedures Is there a written sampling procedure and was it followed? Y N Sample sites are not the ones identified in the approved bacteriological sample siting plan. Y N Sample taps are wet, leaking or dirty Y N The sample collector was not properly trained Y N Were sample bottles delivered to the lab in a cooler and within allowable holding time? Y N Is there a seasonal pattern in positive samples when reviewing historical monitoring? Y N 8 Other Y N