SLIDE 1
Pollutant Minimization Plan for Polychlorinated Biphenyls (PCBs) in the Delaware River Estuary
Robert Hindt Delaware County Regional Water Quality Control Authority 100 East Fifth St Chester, PA 19016 & John Botts Aquatic Sciences Consulting 2130 Glencourse Ln Reston, VA 20191 Delaware Estuary Science & Environmental Summit The Grand Hotel Cape May NJ The Grand Hotel, Cape May, NJ January 13, 2009
SLIDE 2 Delaware River Basin
Fish tissue concentrations of polychlorinated biphenyls (PCBs) often exceed human h lth it i [i f d l health criteria [i.e., federal criteria of 0.17 ng/L and Delaware River Basin Commission (DRBC) criteria ( )
- f 0.0079 – 0.064 ng/L as total
PCBs (later revised to 0.016 ng/L for all zones)] DRBC set total maximum daily loads (TMDLs) for PCBs for zones 1 – 6 TMDLs allocated to point and non-point discharges
SLIDE 3 Existing Loadings Versus Stage 1 TMDLs Delaware Estuary
Taken from DRBC’s TMDL Report – September 2003
SLIDE 4
Pollutant Minimization Plan
PCBs have been banned since the late 1970s and municipal pretreatment ordinances prohibit PCB discharge to sewer pretreatment ordinances prohibit PCB discharge to sewer systems. Residual PCBs are contributed from unknown and diffuse sources (e g atmosphere recycling); however treatment to sources (e.g., atmosphere, recycling); however, treatment to criteria levels is impractical DRBC chose a pollution prevention approach: Section 4 30 9 of the 2005 Water Quality Regulation Section 4.30.9 of the 2005 Water Quality Regulation Amendments require dischargers to prepare and implement Pollutant Minimization Plans (PMP) to identify and control PCB sources in their service areas/facilities Goal is to achieve a 50 percent reduction of the aggregate point and nonpoint loads of total PCBs within the next five years y
SLIDE 5
PCB Sources
Known Sources (i.e., contribute PCB levels in excess of the ( water quality criteria and have defined pathway of release); Examples: atmospheric deposition, CSO tide gate infiltration, intake water, water supply Potential Sources (i.e., PCBs present, but no pathway of release); E l l ki l t i l i t h Examples: non-leaking electrical equipment such as transformers, current and former waste sites, commercial and household materials Unknown Sources - to be identified through “trackdown”
SLIDE 6
Pollution Prevention Efforts for Known and Potential Sources for Known and Potential Sources
Education Programs g
Presentations at public meetings (EAC, LEPC) Handout PCB Brochure to interested groups Education of DELCORA personnel
Industrial User Awareness
Requested data on PCBs removed and stored at permitted Industrial Users; Documented survey results in data base Industrial Users; Documented survey results in data base Inspections now include review of site for potential PCB containing equipment and issues
Assess Waste and Abandoned Sites Assess Waste and Abandoned Sites
Visited several sites within our sewer system Reviewing DelTriP reports and coordinating site visits with agencies
SLIDE 7
PCB Reduction Since 1990s
(Documented by Internal Review and (Documented by Internal Review and Industrial User Survey) Project PCB Fluids Removed DELCORA - Transformers 2960 K DELCORA Transformers and Capacitors 2960 Kg Other Facility Projects 2025 lbs / 920 Kg Other Facility Projects 2025 lbs / 920 Kg Other Industrial Users 80,000+ Kg Other Industrial Users 80,000 Kg Total Over 83,000 Kg
SLIDE 8
Pollution Prevention Efforts for Known and Potential Sources for Known and Potential Sources
(continued)
Upgrade CSO and Stormwater Infrastructure
Rebuilt 24 storm inlets in 2006 and 30 in 2007 Rebuilt 3 CSO Regulator Chambers Installed remote monitoring systems at all CSOs
Clean and Rehabilitate Sewers
Cleaned sediment from over 225,000 ft of sewer in 2006 and 380 000 ft in 2007 380,000 ft in 2007 Cleaned 300 ft of on-site storm sewer Replaced 160 ft of collapsed brick sewer and 3700 ft of pipe
SLIDE 9 Ph 1 T kd T t l PCB b S li L ti
Central Delaware County Authority
Phase 1 Trackdown: Total PCBs by Sampling Location
Authority
Central Delaware PS ND 69 ND 2 ND
WRTP Service Area
Industry B 95 Legend 33 255 Chester PS EPS-1 PS g 1 2
Pump Station
Water (ng/L) PISCES (ng/L)*
I d t i l U /WRTP I fl t
NM 23** 7 255 ND 19 ND 27 WRTP Influent Marcus Hook PS Naamans Creek PS 23 7
Industrial User/WRTP Influent
Water (ng/L) PISCES (ng/L)* ND – not detected by HRGC/LRMS NM = not measurable due to matrix interferences
NM Marcus Hook PS Industry A
interferences * PISCES – passive in-situ continuous extraction sampler ** 2006 sample
SLIDE 10 Phase 2 Trackdown – EPS-1 Sewershed Sampling Locations
95 95 Legend
Stony Creek Interceptor Booth St Interceptor West End Interceptor Delaware Ave Interceptor
Trainer Sewer Line
DE BN BE
Sampling Location
291 95
Highway
291
WE BE SI
WES WEN WEW
322 291
T
DEM BSW
WE
DES EPS
DE C
WRTP INF
SLIDE 11 Phase 2 Trackdown – EPS-1 Sewershed Results
CDE
291
BSW
10
WE
18
Actual location (further east)
CDE
16
T
17 10
DEM
18
DE
37
Legend
Stony Creek Interceptor Booth St Interceptor West End Interceptor
EPS
WRTP
C
<1
INF
23
West End Interceptor Delaware Ave Interceptor Trainer Sewer Line
CDE
16
Sampling Location and Total PCB Result (ng/L)
EPS
67 WRTP 23
SLIDE 12
Question & Answer
