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HomeMy WebLinkAboutSW8891010_COMPLIANCE_20140103STORMWATER DIVISION CODING SHEET POST -CONSTRUCTION PERMITS PERMIT NO. SW8 '� q 10 [ O DOC TYPE ❑ CURRENT PERMIT ❑ APPROVED PLANS ❑ HISTORICAL FILE ® COMPLIANCE EVALUATION INSPECTION DOC DATE Ib I to 01 02 YYYYMMDD STATE OF NORTH CAROLINA Department of Environmental and Natural Resources 127 Cardinal Drive Extension Wilmington, North Carolina 28405 (910)796-7215 FILE ACCESS RECORD SECTION Le t, 1 TIME/DATE 3 h NAME C. I ( ,_.� C i 11 REPRESENTING 1 41 -- ,/ Guidelines for Access: The staff of Wilmington Regional Office is dedicated to making public records in our custody readily available to the public for review and copying. We also have the responsibility to the public to safeguard these records and to carry out our day-to-day program obligations. Please read carefully the following guidelines signing the form: 1. Due to the large public demand for file access, we request that you call at least a day in advance to schedule an appointment to review the files. Appointments will he scheduled between 9:00am and 3:001)m. Viewing time ends at 4:45pm. Anyone arriving without an appointment may view the tiles to the extent that time and staff supervision is available 2. You must specify files you want to review by facility name. The number of files that you , may review at one time will be limited to five. 3. You may make copies of a file when the copier is not in use by the staff and if time permits. Cost per copy is $.05 cents. Payment may be made by check, money order, or cash at the reception desk. Copies totaling $5.00 or more can be invoiced for your convenience. 4. FILES MUST BE KEPT IN ORDER YOU FOUND THEM. Files may not be taken from the office. To remove, alter, deface, mutilate, or destroy material in one of these files is a misdemeanor for which you can be fined up to $500.00. No briefcases, large totes, etc are permitted in the file review area. 5. In accordance with General Statue 25-3-512, a $25.00 processing fee will be charged and collected for checks on which payment has been refused. FACILITY NAME COUNTY 2. 3. 4. 1 Signature and Name of Firm/Business Date Time In Time Out Please attach a business card to this form COPIES MADE I C�' PAID INVOICE S:Admin.file access' ✓ �. STAi( o y � e�. ,sr' , � 3 ,I::. ' S State of North Carolina Department of Environment, Health, and Natural Resources Wilmington Regional Office James B. Hunt, Jr., Governor DIVISION OF ENVIRONMENTAL MANAGEMENT Bob Jamieson Jonathan B. Howes, Secretary Regional Manager June 2, 1994 Mr. Disel Hinkle Commanding General-ATTN Base Maintenance Division Bi_n 8 Marine Corps Base DSC Box 20004 Camp Lejeune, North Carolina 28542-0004 Subject: COMPLIANCE INSPECTION Camp Lejeune Marine Corps Base Onslow County Dear Mr. Hinkle: Please find attached copies of the completed fornis entitled 'Stormwater Compliance Inspection Report". The reports summarize the findings of a rec; nt inspection of the Base's stornwater control structures conducted on June 1, 1994 to determine compliance with Stormwater Certifications issued since 1988. A summary of the findings and comments are noted under Section 6 of the report. Appropriate action; if required, should be completed by July 2, 1994. Please inform this Office by letter when required action is completed. If you have any questions, please contact me at the Wilmington Regional Office; telephone number (910) 395-3900. Sincerely, Linda Lewis Environmental Engineer cc: Central Files Bradley Bennett (2) Linda Lewis 127 Cardinal Drive Extension, Wilmington, N.C. 28405-3845 • Telephone 910-395-3900 • Fax 910-350-2004 An Equal Opportunity Affirmative Action Employer 2. N C! STORMWATER COMPLIANCE INSPECTION REPORT Project Name: Electronics Communications Maintenance Shops Project Number: 891010 Control Measure: Infiltration Water Body: Codgels Creek Classification: SC Directions to site, address: Building 1/1, off Sneads Ferry Road, and Building /i2, off the Main Service Road near Daly Road. Inspection Date: June I, 1994 Weather Conditions: Sunny, warm Comparison of Approved plans vs. As -Built: Maintenance Problems: Compared well. 1. Building 1 side slopes were fairly bare. 5. PE Certification Received? YES Deed Restrictions Received? N/A 6. Comments: Please vegetate the side slopes of the pond at Building 1. 2. Boil, ponds had standing water. A review of the original stornwater files indicates that a hydraulic conductivity of .6 in/hr was used by J.N. Pease and Associates. Building 1 pond storage depth is 3', and it was calculated to take 2.5 days to draw down. Building 2 pond ti , storage depth is 1', and it was calculated to take less than 1 day to;draw down. In order ' to remain in compliance with the Certification, the ponds must draw down within 5 days (June 6, 1994). If drawdown does not occur within 5 days, you may elect to dredge the ponds to remove sediment build-up. If this does not improve the conductivity, the infiltration ponds may need to be redesigned as wet detention ponds. Inspector: Linda Lewis 1" 1 Water Quality/Wilmington Regional Office/(910) 395-3900 DA/arl: S:\WQS\STORMWAT\INSPECT\891010.JUN 7 3. 4. 5. 6. STORMWATER COMPLIANCE INSPECTION REPORT Project Name: Main Exchange, Credit Union, and Commisary Project Number: 920705, 911010, and 891101 Control Measure: 90 Detention Water Body: Beaverdarn Creek Classification: SB. Directions to site, address: Camp Lejeune, Holcomb Boulevard at Birch Street. Inspection Date: June 1, 1994 Weather Conditions: Sunny, warm Comparison of Approved plans vs. As -Built: Maintenance Problems: None PE Certification Received? YES Comments: Compared well. Deed Restrictions Received? N/A The orifice was running in response to a very light rain event of approximately 0.22". The high rate of discharge observed indicated that perhaps the groundwater table had been breached and is entering the pond. While this may not be a problem, you may wish to verify that the water level is 10.35 MSL. A note on the plans I have on file verify that the groundwater elevation prior to construction was within 3 feet of existing grade. This equates to a groundwater elevation of between 17.0 and 19.0, prior to construction. In order to remain in compliance with the Certification, the pond must provide enough storage volume, based on overflowelevations, to store the runoff associated with 1" of water. Adjustments in the elevations of the orifice, spillway, and outlet structure may be needed. Inspector: Linda Lewis �;- ' Water Quality/Wilmington Regional Office/(910) 395-3900 DA/arl: S:\WQS\STORMWAT\INSPECT\920705.JUN STORMWATER COMPLIANCE INSPECTION REPORT 1. Project Name: P-969 Building 909 Replacement Project Number: 920810 Control Measure: 85 Detention Water Body: Codgels Creek Classification: SC NSW Directions to site, address: Camp Lejeune, off Sneads Ferry Road 2. Inspection Date: June 1, 1994 - Weather Conditions: Sunny, warm 3. Comparison of Approved plans vs. As -Built: Compared well. 4. Maintenance Problems: None 5. PE Certification Received? YES Deed Restrictions Received? N/A 6. Comments: 1. I had the original infiltration pond plans with me. A review of the most recent approved plans for a detention pond show construction in compliance with the approved plans. Inspector: Linda Lewis Water Quality/Wilmington Regional Office/(910) 395-3900 DA/arl: S:\WQS\STORMWAT\INSPECT\920810.JUN STORMWATER COMPLIANCE INSPECTION REPORT 1. Project Name: P-229 Electronic Communications Maintenance Shop 2. 3 4 5 0 Project Number: 890201 Control Measure: 85 Detention Water Body: UT New River Classification: SC NSW Directions to site, address: Camp Lejeune, Louis and Dogwood Streets. Inspection Date: June 1, 1994 Weather Conditions: Sunny, warns Comparison of Approved plans vs. As -Built Maintenance Problems: Compared well. 1. An area of the side slope has eroded away. Please repair and stabilize. PE Certification Received? YES Continents: Deed Restrictions Received? N/A 1. The orifice was designed to lay at a 45 degree angle, with the higher end at the invert of 6.5 (the permanent pool elevation). Two feet of storage are provided, with the wier elevation at 8.5. During the inspection, it was noted that the orifice is submerged, however, no significant rainfall had occurred in the past 5 days. The pond must return to the permanent pool elevation no faster than 2 days, and no longer than 5 days. As before, there may be groundwater causing a continuous flow in the pond. Please ascertain that the required volume is not affected. Adjustments in the elevations of the orifice and wier may be necessary. Inspector: Linda Lewis Water Quality/Wilmington Regional Office/(910) 395-3900 DA/arl: S:\WQS\STORMWAT\INSPECT\890201.JUN 2 3. 4. 5. 6. STORMWATER COMPLIANCE INSPECTION REPORT Project Name: P-804 Field Maintenance Complex Project Number: 920215 Control Measure: 90 Detention Water Body: Codgels Creek Classification: Sc Directions to site, address: Camp Lejeune, unsure of street name. Inspection Date: June 1, 1994 Weather Conditions: Sunny, warm Comparison of Approved plans vs. As -Built: Maintenance Problems: PE Certification Received? YES Comments: Compared well. Deed Restrictions Received? N/A It was noted during the inspection that the orifice was submerged and no flow was observed leaving the site. Upon review of the files, the entire outlet control system was raised 2'. Based on the comment by Mr. Hinkle that a survey shot taken recently indicated that the elevation of one corner of the concrete spillway was at 10.10, the structure may not have been raised by the full 2'. The centerline of the 5" orifice was approved at invert 8.5, approximately 2.5' below the lowest part of the spillway. I would judge that to be the case at this pond, and it would appear that the pond is in conformance with the approved plans. You may wish to consider the possibility of providing positive drainage from the point the orifice becomes level with the concrete spillway down to the edge of the spillway. Inspector: Linda Lewis , �✓1 Water Quality/Wilmington Regional Office/(910) 395-3900 DA/arl: S:\WQS\STORMWAT\INSPECT\920215.JUN eSTAII:� State of North Carolina Department of Environment, Health, and Natural Resources Wilmington Regional Office James B. Hunt, Jr., Governor DIVISION OF ENVIRONMENTAL MANAGEMENT Bob Jamieson Jonathan B. Howes, Secretary Regional Manager June 2, 1994 Mr. Disel Hinkle Commanding General-ATTN Base Maintenance Division Bi_n 8 Marine Corps Base DSC Box 20004 Camp Lejeune, North Carolina 28542-0004 Subject: COMPLIANCE INSPECTION Camp Lejeure Marine Corps Base Onslow County Dear Mr. Hinkle: Please find attached copies of the completed forms entitled "Stormwater Compliance Inspection Report". The reports summarize the findings of a -:cent inspection of the Base's stormwater control structures conducted on June 1, 1994 to detennine compliance with Stonmwater Certifications issued since 1988. A summary of the findings and comments are noted under Section 6 of the report. Appropriate action, if required, should be completed by July 2, 1994. Please inform this Office by letter when required action is completed. If you have any questions please contact me at the Wilmington Regional Office, telephone number (910) 395-3900. Sincerely, r Linda Lewis Environmental Engineer cc: Central Files Bradley Bennett (2) Linda Lewis 127 Cardinal Drive Extension, Wilmington, N.C. 28405-3845 • Telephone 910-395-3900 • Fax 910-350-2004 An Equal Opportunity Affirmative Action Employer s STORMWATER COMPLIANCE INSPECTION REPORT 1. Project Name: Project Number: Water Body: Fla 3 4 R 0 Electronics Communications Maintenance Shops 891010 Codgels Creek Directions to site, address: Inspection Date: June 1, 1994 Weather Conditions: Sunny, warm Control Measure: Infiltration Classification: SC Building 1/1, off Sneads Ferry Road, and Building #2, off the Main Service Road near Daly Road. Comparison of Approved plans vs. As -Built: Maintenance Problems: Building I side slopes were fairly bare. PE Certification Received? YES Comments: Compared well. Deed Restrictions Received? N/A Please vegetate the side slopes of the pond at Building 1. Z. Both ponds had standing water. A review of the original stonnwater tiles indicates that a hydraulic conductivity of .6 in/hr was used by J.N. Pease and Associates. Building 1 pond 3-^storage depth is 3', and it was calculated to take 2.5 days to draw down. Building 2 pond storage depth is 1', and it was calculated to take less than 1 day to draw :;down. In order aVto;remam in compliance with the Certification, -the ponds must drawAown within 5 days (June 6, 1994). If drawdown does not occur within 5 days, you may elect to dredge the ponds to remove sediment build-up. If this does not improve the conductivity, the infiltration ponds may need to be redesigned as wet detention ponds. Inspector: Linda Lewis i 1 "_ Water Quality/Wilmington Regional Office/(910) 395-3900 DA/arl: S:\WQS\STORMWAT\INSPECT\891010.JLTN 2. 3. 4. 5. 6. STORMWATER COMPLIANCE INSPECTION REPORT Project Name: Main Exchange, Credit Union, and Commisary Project Number: 920705, 911010, and 891101 Control Measure: 90 Detention Water Body: Beaverdatn Creek Classification: SB Directions to site, address: Camp Lejetme, Holcomb Boulevard at Birch Street. Inspection Date: June 1, 1994 Weather Conditions: Sunny, warni Comparison of Approved plans vs. As -Built: Maintenance Problems: None PE Certification Received? YES Continents: Compared well. Deed Restrictions Received? N/A The orifice was running in response to a very light rain event of approximately 0.22". The high rate of discharge observed indicated that perhaps the groundwater table had been breached and is entering the pond. While this may not be a problem, you may wish to verify that the water level is 10.35 MSL. A note on the plans I have on file verify that the groundwater elevation prior to construction was within 3 feet of existing grade. This equates to a groundwater elevation of between 17.0 and 19.0, prior to construction. In order to remain in compliance with the Certification, the pond must provide enough storage volume. based on overflow elevations, to store the nntoff associated with 1" of water. Adjustments in the elevations of the orifice, spillway, and outlet structure may be needed. Inspector: Linda Lewis ' l Water Quality/Wilmington Regional Office/(910) 395-3900 DA/arl: S:\WQS\STORMWAT\INSPECT\920705.JUN STORMWATER COMPLIANCE INSPECTION REPORT 1. Project Name: P-969 Building 909 Replacement Project Number: 920810 Control Measure: 85 Detention Water Body: Codgels Creek Classification: SC NSW Directions to site, address: Camp Lejeune, off Sneads Ferry Road 2. Inspection Date: June 1, 1994 Weather Conditions: Sunny, wann 3. Comparison of Approved plans vs. As -Built: Compared well. 4. Maintenance Problems: None 5. PE Certification Received? YES Deed Restrictions Received? N/A 6. Comments: 1. I had the original infiltration pond plans with me. A review of the most recent approved plans for a detention pond show construction in compliance with the approved plans. Inspector: Linda Lewis c'= Water Quality/Wilmington Regional Office/(910) 395-3900 DA/arl: S:\WQS\STORMWAT\INSPECT\920810.JLTN 2. 3 M STORMWATER COMPLIANCE INSPECTION REPORT Project Name: P-229 Electronic Communications Maintenance Shop Project Number: 890201 Control Measure: 85 Detention Water Body: UT New River Classification: SC NSW Directions to site, address: Camp Lejeune, Louis and Dogwood Streets. Inspection Date: June 1, 1994 - Weather Conditions: Sunny, warn Comparison of Approved plans vs. As -Built: Compared well. Maintenance Problems: 1. An area of the side slope has eroded away. Please repair and stabilize. 5. PE Certification Received? YES Deed Restrictions Received? N/A 6. Comments: 1. The orifice was designed to lay at a 45 degree angle, with the higher end at the invert of 6.5 (the permanent pool, elevation). Two feet of storage are provided, with the wier elevation at 8.5. During the inspection, it was noted that the orifice is submerged, however, no significant rainfall had occurred in the past 5 days. The pond must return to the penmanent pool elevation no faster than 2 days, and no longer than 5 days. As before, there may be groundwater causing a continuous flow in the pond. Please ascertain that the required volume is not affected. Adjustments in the elevations of the orifice and wier may be necessary. Inspector: Linda Lewis Pj� Water Quality/Wilmington Regional Office/(910) 395-3900 DA/arl: S:\WQS\STORMWAT\INSPECT\890201.JUN 7 3. 4. 5. 6. STORMWATER COMPLIANCE INSPECTION REPORT Project Name: P-804 Field Maintenance Complex Project Number: 920215 Control Measure: 90 Detention Water Body: Codgels Creek Classification: Sc Directions to site, address: Camp Lejeune, unsure of street name. Inspection Date: June 1, 1994 Weather Conditions: Sunny, warm Comparison of Approved plans vs. As -Built Maintenance Problems: PE Certification Received? YES Comments: Compared well. Deed Restrictions Received? N/A It was noted during the inspection that the orifice was submerged and no flow was observed leaving the site. Upon review of the files. the entire outlet control system was raised 2'. Based on the comment by Mr. Hinkle that a survey shot taken recently indicated that the elevation of one corner of the concrete spillway was at 10.10, the structure may not have been raised by the full 2'. The centerline of the 5" orifice was approved at invert 8.5, approximately 2.5' below the lowest part of the spillway. I would judge that to be the case at this pond, and it would appear that the pond is in conformance with the approved plans. You may wish to consider the possibility: of providing positive drainage from the point the orifice becomes level with the concrete spillway down to the edge of the spillway. n; Inspector: Linda Lewis cA1P L_., Water Quality/Wilmington Regional Office/(910) 395-3900 DA/arl: S:\WQS\STORMWAT\INSPECT\920215.JUN