Skip directly to: content | left navigation | search
  1. ATSDR > Public Health Assessments & Consultations

HEALTH CONSULTATION

Historical Document

This Web site is provided by the Agency for Toxic Substances and Disease Registry (ATSDR) ONLY as an historical reference for the public health community. It is no longer being maintained and the data it contains may no longer be current and/or accurate.

EXPOSURE INVESTIGATION

GREAT POND
WEYMOUTH, NORFOLK COUNTY, MASSACHUSETTS


TABLES


Table 1: Arsenic Test Results for Water Samples Collected Biweekly from the Great Pond Water Treatment Plant

Date of Collection Pre-treatment Result (ppb)
7/2/2002 ND
7/16/2002 ND
7/30/2002 ND
8/13/2002 ND
8/27/2002 ND
9/10/2002 ND
9/24/2002 ND
10/8/2002 ND
10/22/02 ND
11/5/2002 ND
11/19/2002 ND
12/3/2002 ND
12/17/2002 ND
12/31/2002 ND
1/14/2003 ND
1/28/2003 ND
2/11/2003 ND
2/25/2003 ND
3/11/2003 ND
3/25/2003 ND
4/8/2003 ND
4/22/2003 ND
5/6/2003 ND
5/20/2003 ND
6/3/2003 ND
6/18/2003 ND
ND = non-detect
ppb = parts per billion
Detection Limit = 5 ppb

Table 2: Surface Water Data

Date Location Coordinates Depth
(feet)		 DO
(ppm)		 pH Temp
(C)		 Conductivity
(ohms)		 Turbidity
(NTU)		 Description Arsenic
(ppm)
8/30/2002 1 42.1633065 N
70.9668332 W
48.28 m		 10.5 6.6 9.34 18 230 38 1 foot below surface ND
8/30/2002 1 " 10.5 6.6 9.34 18 230 38 1 foot below surface duplicate ND
8/30/2002 1 " 10.5 6.4 8.9 18 230 40 1 foot above bottom ND
8/30/2002 1 " 10.5 6.4 8.9 18 230 40 1 foot above bottom duplicate ND
8/30/2002 2 42.1647252 N
70.9679668 W
41.99 m		 10.75 6.4 8.76 20 260 34 1 foot below surface ND
8/30/2002 2 " 10.75 7 8.53 19 270 44 1 foot above bottom ND
8/30/2002 3 42.1615374 N
70.9707952 W
56.15 m		 12.25 6.5 7.08 19 230 37 1 foot below surface ND
8/30/2002 3 " 12.25 6.5 7.63 19 235 42 1 foot above bottom ND
8/30/2002 4 42.1536975 N
70.9659256 W
54.76 m		 5.5 6.5 8.8 25 220 35 1 foot below surface ND
8/30/2002 4 " 5.5 7 8.87 20 220 32 1 foot above bottom ND
8/30/2002 NA NA NA NA NA NA NA NA rinsate blank, taken on shore after sampling ND
9/6/2002 5 42.15832964 N
70.96488019 W
47.60 m		 4.5 17 8.32 21 220 13.5 1 foot below surface ND
9/6/2002 5 " 4.5 17 8.32 21 220 13.5 1 foot below surface duplicate ND
9/6/2002 5 " 4.5 15 8.74 21 220 16 1 foot above bottom ND
9/6/2002 5 " 4.5 15 8.74 21 220 16 1 foot above bottom duplicate ND
9/6/2002 NA NA NA NA NA NA NA NA rinsate blank, taken on shore after sampling ND
4/18/2003 1 42.163685476 N
70.966449190W
52.620 m		 18 11.5 7.68 10.8 150 4.76 one foot below surface ND
4/18/2003 1 " 18 10.8 7.68 10.8 150 0.97 one foot above bottom ND
4/18/2003 2 42.164957930 N
70.968075189W
55.038 m		 6 10.4 7.57 11.6 150 1.08 one foot below surface ND
4/18/2003 2 42.164957930 N
70.968075189W
55.038 m		 6 10.4 7.57 11.6 150 1.08 one foot below surface duplicate ND
4/18/2003 2 " 6 10.2 7.63 11.7 150 1.07 one foot above bottom ND
4/18/2003 2 " 6 10.2 7.63 11.7 150 1.07 one foot above bottom duplicate ND
4/18/2003 3 42.161259301 N
70.972194810W
46.351 m		 14.5 10.8 6.87 12 140 0.97 one foot below surface ND
4/18/2003 3 " 14.5 10.6 6.71 10.5 140 1.4 one foot above bottom ND
4/18/2003 4 42.153768559 N
70.965930692W
48.718 m		 8.5 2 6.7 10.4 140 1.01 one foot below surface ND
4/18/2003 4 " 8.5 2 7.02 10.1 140 1.05 one foot above bottom ND
4/18/2003 5 42.158419271 N
70.964885559W
46.707 m		 5.5 10.8 6.25 11.1 140 1.04 one foot below surface ND
4/18/2003 5 " 5.5 10.8 6.42 10.9 140 1.22 one foot above bottom ND
ND = non-detect
DO = dissolved oxygen

Table 3: Sediment Data

Sample ID Date Location Coordinates Depth
(feet)		 Type of Sample Result
(Detection Limit, mg/kg)
SD080201 8/30/2002 1 42.1633065 N
70.9668332 W
48.28 m		 10.5   ND (6)
SD080201-D 8/30/2002 1 " 10.5 duplicate ND (5.4)
SD080202 8/30/2002 2 42.1647252 N
70.9679668 W
41.99 m		 10.75   ND (5.9)
SD080203 8/30/2002 3 42.1615374 N
70.9707952 W
56.15 m		 12.25   6.4 (5.6)
SD080204 8/30/2002 4 42.1536975 N
70.9659256 W
54.76 m		 5.5   ND (1.2)
SD080205A 9/6/2002 5 42.15832964 N
70.96488019 W
47.60 m		 4.5   ND (1.2)
SD080205A-D 9/6/2002 5 " 4.5 duplicate ND (1.2)
SD040301 4/18/2003 1 42.163685476 N
70.966449190W
52.620 m		 18   ND (17)
SD040301-D 4/18/2003 1 " 18 duplicate ND (15)
SD040302 4/18/2003 2 42.164957930 N
70.968075189W
55.038 m		 6   ND (6.5)
SD040303 4/18/2003 3 42.161259301 N
70.972194810W
46.351 m		 14.5   ND (15)
SD040304 4/18/2003 4 42.153768559 N
70.965930692W
48.718 m		 8.5   ND (6.2)
SD040305 4/18/2003 5 42.158419271 N
70.964885559W
46.707 m		 5.5   ND (9.1)
ND = non-detect

Table 4: Regulatory Monitoring Data for the Town of Weymouth Drinking Water Supply, 1994 - 2001

Date Location Result (ppb)
2/8/1994 Circuit Ave. Well BDL
2/8/1994 Great Pond WTP BDL
2/8/1994 Main St. Well BDL
2/8/1994 Winter St Well #1 BDL
2/8/1994 Winter St, Well #2 BDL
4/28/1994 Winter St. WTP BDL
2/2/1995 Great Pond WTP BDL
2/2/1995 Great Pond WTP BDL
2/2/1995 Swamp River Raw BDL
2/28/1996 Great Pond WTP BDL
2/28/1996 Swamp River Raw BDL
1/29/1997 Circuit Ave. Well BDL
1/29/1997 Great Pond WTP BDL
1/29/1997 Main St. Well BDL
1/29/1997 Swamp River Raw BDL
1/29/1997 Winter St, WTP BDL
1/29/1997 Winter St. Well #1 BDL
1/29/1997 Winter St. Well #2 2
6/9/1997 Libbey Park Well 6
3/30/1998 Great Pond WTP BDL
3/26/1999 Great Pond WTP BDL
2/16/2000 Great Pond WTP BDL
2/16/2000 Libbey Park Well BDL
2/16/2000 Winter St WTP BDL
3/20/2001 Great Pond WTP BDL
3/20/2001 Winter St WTP BDL
ppb = parts per billion
BDL = below detection limit
Next Section          Table of Contents

Agency for Toxic Substances and Disease Registry, 1825 Century Blvd, Atlanta, GA 30345
Contact CDC: 800-232-4636 / TTY: 888-232-6348 
USA.gov: The U.S. Government's Official Web Portal
DHHS
Department of Health and Human Services