Year

Activity

1952

Anthrquinone dye manufacturing started; wastewater discharged to Toms River.

1959

Azo dye and epoxy resin manufacturing started.

1960

First wastewater treatment plant replaced; wastewater continues to be discharged to river.

1966

Treated wastewater discharged to Atlantic Ocean through outfall pipeline.

1977

Second wastewater treatment plant replaced

1983

Site added to National Priorities List.

1984

Pipeline break at Bay Avenue and Vaughn Avenue.

1985

Pipeline break at Bay Avenue and Vaughn Avenue.

Ciba-Geigy installed purge-well system to intercept and treat groundwater contamination.

59 monitoring wells installed at CGC site

1986

Pipeline break at Oak Ridge Parkway.

Treatment of wastewater with PACT

1987

USEPA residential well sampling begins (58 wells)

1988

ATSDR Public Health Assessment and two Health Consultations published

Operable Unit I (groundwater) Remedial Investigation published

Coulter Street and Whitesville Road well sampling

Pipeline break Bay Avenue and Hooper Avenue

Dye manufacturing ceased.

Ground water baseline risk assessment (11 indicator chemicals) published

1989

Pipeline break at Mapletree Avenue and Old Freehold Road

USEPA issues Record of Decision for Operable Unit 1 (groundwater)

Occupational epidemiology study published

1991

Wastewater discharge to Atlantic Ocean terminated

ATSDR Health Assessment Addenda published - marsh sediments and surface waters; soil TIC's

Epoxy resin manufacturing ceased.

1992

ATSDR Lead Initiative Summary Report published

ATSDR Heath Consultation published - soil gases

1993

Revised Draft Source Area Remedial Investigation and Baseline Risk Assessment published

Cardinal Drive soil gas study

USEPA issues Explanation of Significant Differences

1994

On-site soil TIC investigation

1995

NJDHSS childhood cancer incidence analysis for Dover Township,
1979-1991

1996

On-site groundwater treatment system operational.

NJDHSS and ATSDR issue Public Health Response Plan

NJDHSS sampling of community water supply and exposure investigation begins

On-Site groundwater monitoring (SAMP 4)

1997

NJDHSS sampling of on- and off-site monitoring wells

NJDHSS releases Public Health Consultation on childhood cancer incidence, 1979-1995

Design of NJDHSS epidemiologic study of childhood cancer in Dover Township initiated

1998

Long Term Monitoring Plan implemented

1999

Feasibility study issued for Operable Unit 2 (on-site source areas)