HomeMy WebLinkAboutNC0021229_Pretreatment - STMP_20210301TOWN OF OLD FORT WWTP
PRETREATMENT PROGRAM (MODIFIED)
SHORT TERM MONITORING PLAN
ACTIVATED SLUDGE/ AEROBIC DIGESTER WITH
CLASS A BIORESIDUAL MANAGEMENT FACILITY
SAMPLING FREQUENCY
SAMPLING POINT Within one year before HWA:
1-- INFLUENT QUARTERLY
2--EFFLUENT QUARTERLY
3--ACTIVATED ONCE
SLUDGE TANK
4--SLUDGE TO PER SLUDGE PERMIT AND
DISPOSAL 503 REGULATIONS (ONCE)
5 --SIU PER SIU PERMIT AND ONCE
PER YEAR FOR POC's
Influent and effluent will be sampled in March, June, September and
December .
Influent will be composite sampled on Monday and effluent will be
composite sampled on Thursday to allow for detention time through
the WWTP.
TOWN OF OLD FORT WWTP
PRETREATMENT PROGRAM (MODIFIED)
SHORT TERM MONITORING PLAN
ACTIVATED SLUDGE/ AEROBIC DIGESTER WITH
CLASS A BIORESIDUAL MANAGEMENT FACILITY
SAMPLING PLAN:
P.O.C.PT. 1 PT. 2 PT. 3 PT. 4 PT.5
As X X X X X
Cd X X X X X
Cr X X X X X
Cu X X X X X
Pb X X X X X
Hg X X X X X
Mo X X X X X
Ni X X X X X
Se X X X X X
Zn X X X X X
FLOW X X
% SOLIDS X
BOD X X X
TSS X X X X
NH3 X X X X
1= influent
2 = effluent
3 = aeration
4 = sludge
5 = SIU (Hillman)
TOWN OF OLD FORT WWTP
PRETREATMENT PROGRAM (MODIFIED)
SHORT TERM MONITORING PLAN
ACTIVATED SLUDGE/ AEROBIC DIGESTER WITH
CLASS A BIORESIDUAL MANAGEMENT FACILITY
DETECTION LEVEL AND SAMPLING METHOD
P.O.C.DETECTION LEVEL, MG/L SAMPLING METHOD
As 0.01 24 HOUR COMPOSITE
Cd 0.002 24 HOUR COMPOSITE
Cr 0.005 24 HOUR COMPOSITE
Cu 0.002 24 HOUR COMPOSITE
Pb 0.01 24 HOUR COMPOSITE
Hg *0.0002 GRAB
Mo 0.1 24 HOUR COMPOSITE
Ni 0.01 24 HOUR COMPOSITE
Se 0.01 24 HOUR COMPOSITE
Zn 0.01 24 HOUR COMPOSITE
FLOW N/A N/A
% SOLIDS N/A N/A
BOD 2 24 HOUR COMPOSITE
TSS 2.5 24 HOUR COMPOSITE
NH3 0.1 24 HOUR COMPOSITE
* Effluent (sampling point 2) mercury samples require EPA method 1631
with a detection limit of 0.000001 mg/L ( 1 ng/L).
TOWN OF OLD FORT WWTP
PRETREATMENT PROGRAM (MODIFIED)
SHORT TERM MONITORING PLAN
ACTIVATED SLUDGE/ AEROBIC DIGESTER WITH
CLASS A BIORESIDUAL MANAGEMENT FACILITY
DIAGRAM:
5 - SIU
pump station
influent
1
bar screen
return
sludge
4
sludge to disposal
2
receiving stream- Curtis Creek
equalization
tank
0.8 MG
aeration tank
1.2 MG
3
clarifiers 1, 2, & 4
aerobic
digester
belt press &
lime
pasteurization
Cl2 contact
chamber