In order to Overflow correct screening this on significant finished water deficiency you storage tank must improvement provide EPA with the has a needed. (see #24 following photo #) mesh documentation: screen Overflow must OR a A be completed fitted with a copy of the #24-mesh non Unknown corrodible valve Integrity screen, or OR a properly Checklist. sealed flapper or duckbill to A copy of the sealed prevent inspection contamination report. The (including inspection valve contamination report must with carried by describe the screen insects, rodents, condition of inside and birds) from each specified (EPA entering the tank component water and include system. The screen photographs. a #24 should mesh preferably be The date that installed within any corrective the pipe at a actions needed location least to address susceptible to deficiencies vandalism. with the tank When a flapper components will valve is used, a be completed. screen must be EPA will placed inside review the the valve (EPA inspection Region 8 report and may recommends require #24-mesh additional mesh corrective be used). In actions. cold climates, use of a flapper or duckbill valve should be considered to minimize air movement and hence ice
In order to correct this significant deficiency you must provide EPA with the following documentation: A completed copy of the Unknown Integrity Checklist. A copy of the inspection report. The inspection report must describe the condition of each specified tank component and include photographs. The date that any corrective actions needed to address deficiencies with the tank components will be completed. EPA will review the inspection report and may require additional corrective actions. has a #24 mesh screen OR a valve OR a sealed valve with screen inside (EPA a #24 mesh Overflow screening on finished water storage tank improvement needed. (see photo #) Overflow must be fitted with a #24-mesh non corrodible screen, or properly sealed flapper or duckbill to prevent contamination (including contamination carried by insects, rodents, and birds) from entering the water system. The screen should preferably be installed within the pipe at a location least susceptible to vandalism. When a flapper valve is used, a screen must be placed inside the valve (EPA Region 8 recommends #24-mesh mesh be used). In cold climates, use of a flapper or duckbill valve should be considered to minimize air movement and hence ice
ss_tribal_form.docx