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1972 clean water act - Answer✅✅Administered by the US environmental protection
agency (EPA) Created the NPDES
1987 - Answer✅✅Amendment to CWA CALLED WATER QUALITY ACT
NPDES in south carolina - Answer✅✅South Carolina is NPDES delegated state.
NPDES regulations are administered by - Answer✅✅SCDHEC
CGP authorizes - Answer✅✅stormwater discharges from construction sites
Who must obtain NPDES coverage - Answer✅✅land disturbing activities greater
than or equal to 1 acre
-land disturbance less than 1 ac within 1/2 miles of water body in SC costal zone
NPDES permits are issued to - Answer✅✅operator-person or company for a
particular discharge
, primary permittee - Answer✅✅-has day to day operational control to ensure
compliance with SWPP
-typically the owner or developer
primary permittee responsibilites - Answer✅✅submit NOI, Preparation of the
C_SWPPP
Secondary permittee - Answer✅✅individual lot owner or residential builder that
conducts land disturbing activity limited to an individual lot or group of lots as part of
approved LCP of development
contractors - Answer✅✅must on Contractor Certification- D-0437
On-Site SWPPP - Answer✅✅SCDHEC CGP, NOI, NPDES coverage approval letter,
Contractor Certifications, Local Approvals, USACE approvals, Critical area
permit(coast)
OS_SWPPP - Answer✅✅a copy of signed and certified SWPPP, NOI, and CGP
coverage letter from DHEC must be retained at site or electronically accessible
minor modification to ON-SWPPP - Answer✅✅minor modifications made directly
in the field,do not need approval by DHEC- additional BMP's, removal of disturbed
areas
major modifications to OS-SWPPP - Answer✅✅must be made by qualified
individual and submitted to DHEC or appropriate delegated entity for approval
Phased plan requirement > 5 - Answer✅✅include a phased stormwater
management plan which identifies all BMP's and grading work conducted during a
specific portion of the sites construction sequence. Each phase identified on at least
one separate plan sheet.
Phased plan requirement < 10 but > 5 acres - Answer✅✅at least two separate plan
phases are required - initial land disturbance phase - stabilization phase
Phased plan requirement ≥ 10 acres - Answer✅✅at least 3 separate plan phases
are required - initial land disturbance phase - construction phase - stabilization phase
All compliance inspection must include invesg. of, at a minimum of 5 of the
following - Answer✅✅1. areas of site disturbed by construction activity and areas
used for storage of materials exposed to precipitation
2. stormwater conveyance systems for evidence of sediment
3. BMP's identified in OS-SWPPP
4. Discharge location to investigate if sediment leaving site, or if such locations are
inaccessible, nearby downstream location if possible.
5. Where vehicles enter or exit site for evidence of off-site sediment tracking.