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Home My WebLink AboutSW1080104_Inspection Report_20100922Beverly Eaves Perdue Governor October 20, 2010 Q�A NCDENR North Carolina Department ofsEnvironment and Natural Division of Water Quality Coleen H. Sullins Director Mr. Bill Parker, Assistant Superintendent for Administrative Services Henderson County Schools 414 Fourth Avenue West Hendersonville, NC 28739 SUBJECT: Mills River Elementary School Stormwater BMP Inspection DWQ Permit Number: SW1080104 Henderson County Dear Mr. Parker: 71LE COPY Resources Dee Freeman Secretary On September 22, 2010, Susan A. Wilson and Chuck Cranford, from the Asheville Regional Office of the Division of Water Quality (DWQ), conducted a site inspection for the stormwater controls at Mills River Elementary School. Some issues were noted during the inspection and file review and are outlined in the attached inspection report. Please contact this office in writing after the issues have been reviewed and/or resolved (this should be done by December 10, 2010). The original Operation and Maintenance agreement was signed by Mr. Bo Caldwell and has been attached for your review. DWQ reminds you that the stormwater controls are to be inspected, at minimum, once a month and within 24 hours after every storm event greater than 1.0 inches. Records for inspection and maintenance should be kept in a known/set location and must be available upon request, The School's original consulting engineer/consulting firm has also been copied with this letter. The Engineer's Certification for the subject permit has not been received and should be submitted to this office. As noted in the inspection report, a level spreader appears on the approved plans but was not found during the site inspection. SURFACE WATER PROTECTION SECTION —ASHEVILLE REGIONAL OFFICE One Location: 2090 U.S. Highway 70, Swannanoa, North Carolina 28778 NorthCarolina Phone: 828-296-45001 FAX: 828-299-70431 Customer Service: 1-877.623-6748 I Internet: www.nceraterquality.org Naturally An Equal Opportunity 4 AfrmaM Action Employer Mr. Parker October 20, 2010 Page 2 of 2 Should you have any questions regarding these matters, please contact me at (828) 296-4500. Sincerely, Susan A. Wilson, P.E., Environmental Engineer Surface Water Protection Section Enc: Inspection Report cc: ARO File Copy DWQ Central Files Brian J, Dey, P.E. c/o McKim and Creed 8020 Tower Point Drive Charlotte, NC 28277 Henderson County Planning SASWP\flcnderson\Stormwaterl5-State StormwaterWills River EIemICELLTTR.Mills River Elem SSw.10 2010.doc P Compliance Inspection Report Permit: SW1080104 Effective: 03/21/08 Expiration: 03/20/18 Owner: Henderson County Schools Project: Mills River Elementary County: Henderson 96 School House Rd Region: Asheville Horse Shoe NC 28742 Contact Person: Brian 3 Dey Title: Phone: 704-841-2588 Directions to Project: Project is on the intersection of School House Road and Banner Farm Road. Type of Project: State Stormwater - General Permit Drain Areas: 01 - On -Site Representative(s): Related Permits: Inspection Date: 09/22/2010 Entry Time: 09:03 AM Primary Inspector: Susan A Wilson Secondary Inspector(s): Chuck Cranford Reason for Inspection: Routine Permit Inspection Type: State Stormwater Facility Status: ❑ Compliant ■ Not Compliant Question Areas: 0 State Stormwater (See attachment summary) Exit Time: 09:45 AM Phone: 828-294-4500 Phone: Inspection Type: Compliance Evaluation Page: 1 Permit: SW1080104 Owner - Project: Henderson County Schools Inspection Date: 09/22/2010 Inspection Type: Compliance Evaluation Reason for Visit: Routine Inspection Summary: ' Susan Wilson and Chuck Cranford of the Surface Water Protection Section, in the Asheville Regional Office, conducted a site inspection at Mills River Elementary (Henderson County Public School) on September 22, 2010. The forebay and basin appeared to be inundated (it appears that the basin may not be draining properly or that the Seasonal High Water Table was higher than predicted). The School should ensure that the outlet orifice is not clogged (and/or have the design engineering firm ensure the basin was properly cleaned out prior to operation, etc.). At the time of the inspection, the County had not received a significant rainfall event in over 7 days - so the very full forebay and basin were surprising. A level spreader was shown on the approved plans - but was not found during the inspection. Please review this situation with your design engineers. At this time, there does not appear to be any resultant water quality problems at the site. However, if the stormwater BMP is not properly maitained, problems may occur in the future. Page: 2 c I Permit: SW1080104 owner - Project: Henderson County Schools Inspection Date: 09/22/2010 inspection Type: Compliance Evaluation Reason for Visit: Routine File Review Yes No NA NE Is the permit active? Signed copy of the Engineers certification is in the file? Signed copy of the Operation & Maintenance Agreement is in the file? Copy of the recorded deed restrictions is in the file? Comment: A copy of the Engineer's Certification of Completion was not found on file. Mr. Bo Caldwell signed the O&M agreement. Built Upon Area Is the site BUA constructed as per the permit and approval plans? Is the drainage area as per the permit and approved plans? Is the BUA (as permitted) graded such that the runoff drains to the system? Comment: From appearance of the site and comparison to the plans - this appears accurate. Are the SW measures constructed as per the approved plans? Are the inlets located per the approved plans? Are the outlet structures located per the approved plans? Comment: No level spreader/vegetated strip was noted at the outlet (as was indicated on the plans). The inlet could not be observed due to plant growth. ■ L ❑ ❑ ■ ❑ ❑ ❑ ■ ❑ ❑ ❑ Yes No NA NE ❑ ■ ❑ ❑ ❑ ❑ ❑ ■ ■ ❑ ❑ ❑ The wet detention pond may not be draining properly - it appeared to be too full during the time of inspection (and since there had been no rain in several days). It would be beneficial to have a sediment indicator in the forebay and basin. Operation and Maintenance Yes No NA NE Are the SW measures being maintained and operated as per the permit requirements? ■ ❑ ❑ Cl Are the SW BMP inspection and maintenance records complete and available for review or provided to DWQ ❑ ❑ ❑ ■ upon request? Comment: The facility appears to be new (within the past year). Maintenance did not appear to be a problem at this time. The School will be reminded of the O&M requirement to ensure proper record keeping. Other Permit Conditions Yes No NA NE Is the site compliant with other conditions of the permit? 0 ❑ ❑ ❑ Comment: The site appeared compliant with other conditions of the permit. Page: 3 Permit: SW1080104 Owner - Project: Henderson County Schools Inspection Date: 09/22/2010 Inspection Type: Compliance Evaluation Reason for Visit: Routine Other WQ Issues Ypa No NA NE Is the site compliant with other water quality issues as noted during the inspection? ■ ❑ ❑ ❑ Comment: There were no visible water quality problems from the stormwater system at the time of inspection. Page: 4