HEALTH CONSULTATION
Evaluation of Private Well Sampling Data
CALLAWAY AND SON DRUM SERVICE
LAKE ALFRED, POLK COUNTY, FLORIDA
On August 15, 2000, the Florida Department of Health (FDOH) held a public availability session regarding the Callaway and Son Drum Service hazardous waste site. At the meeting, FDOH announced the findings of their public health assessment and offered to test nearby potable private wells. FDOH determined that a Health Consultation is an appropriate means to present drinking water data from private wells surrounding a hazardous waste site. The interpretation, advice, and recommendations presented in this Health Consultation are site-specific and should not be considered applicable to any other site. The federal Agency for Toxic Substances and Disease Registry (ATSDR) in Atlanta, Georgia, provides 100% of the funding for these activities.
The Callaway and Son Drum Service hazardous waste site is at 890 East Lake Drive (US 17-92) in Lake Alfred, Polk County, Florida (Figure 1). The site posts a "Callaway and Son Satellite Systems" sign, corresponding to the business that occupied the site after the drum service. The site covers approximately 9.5 acres and consists of a drum cleaning area, a sandblasting and painting area, and a drum storage area (Figure 2). A vacant office building occupies the southern portion of the site. The northern border of the site is a rail line, which separates the site from a University of Florida Agriculture Experiment Station. A plant nursery is south of the site and the Lake Alfred sewage treatment plant is due west. A cemetery and an apartment complex are east of the site.
Land use in this area is a mix of commercial and residential. The apartments east of the site are the nearest residential buildings. Across East Lake Drive (US 17-92) to the southeast and southwest within one-half of a mile of the site are communities with many homes. Residential properties are also northwest of the site. Commercial and nonresidential establishments exist west, north, and northeast of the site. Three schools are within one mile of the site. An elementary school and a career center are approximately 1 mile southwest of the site and another school is 0.3 miles northwest of the site. Each of these schools receives municipal water service. Based on the 1990 census, approximately 1300 people live within 1 mile of the site (Table 1).
Groundwater in this area is contained in two aquifers. The surficial aquifer extends from beneath the surface to about 50 to 75 feet deep. This aquifer provides a low yield of poor-quality water. Most private potable and municipal wells are drilled into the Floridan aquifer, which lies beneath the surficial aquifer and extends several hundred feet deep. Groundwater in both aquifers reportedly flows in a southerly direction.
Between 1977 and 1991, Callaway and Son Drum Service cleaned and recycled 55-gallon citrus and oil drums. The company cleaned the drums with a resin solution and then rinsed them in a 600-gallon fresh water tank. The facility processed about 20 drums per day, 5 days a week. During the citrus season, however, Callaway and Son Drum Service handled up to 500 drums per day (FDER, 1992). The company drained the rinse tank into the pond/wetland area on the eastern portion of the property every two weeks (EPA, 1994). Currently, no business operations exist on-site.
Private Well Testing
In February 2000, the federal Environmental Protection Agency (EPA) proposed the Callaway and Son Drum Service site to the National Priorities List (NPL) of hazardous waste sites. In response, FDOH reviewed all available environmental data and conducted a public health assessment on this site. In the public health assessment report, FDOH classified this site as an "indeterminate public health hazard" based on the limited amount of data. FDOH also made recommendations to area residents and environmental agencies to prevent exposure to site contaminants (FDOH, 2001). On August 15, 2000, FDOH presented the public health assessment report to area residents at a public availability session held at the Lake Alfred City Hall. Several residents expressed a concern about the effect of this site on the area groundwater and private water supplies. Therefore, FDOH, in cooperation with the Polk County Health Department (PCHD), offered to test private potable wells within 0.25 miles of the site, at the well owner's request. In the immediate area, most homes receive municipal water service, including the neighboring apartment complex. However, some homes use private or community wells as a source of potable water.
During the public availability session, FDOH and PCHD received requests from eight well owners to have their well water tested for contaminants from the Callaway site. FDOH and PCHD also tested the City of Lake Alfred municipal water supplies. On September 7, 2000, PCHD personnel collected water samples from the municipal well and eight private wells near the Callaway site. Of these eight wells, five are single household wells located southeast of the site. Another private well is also southeast of the site but serves a larger population (~75). Of the two remaining private wells, one is immediately south of the site. This well is in closest proximity to the site and reportedly is used for irrigation. The last of the eight private wells tested is approximately one mile southwest from the site. The municipal well is slightly less than one mile west of the site. The legend below Table 2 lists the location of these wells in relation to the site. Figure 1 shows the approximate location of the these wells. Reportedly, most area potable and irrigation wells are drilled into the Floridan aquifer, because of its high productivity (EPA, 1994).
Quality Assurance and Quality Control
PCHD adhered to collection methods that are applicable for samples where volatile compounds are to be analyzed. Appropriate chain-of-custody and data reporting procedures were followed and appropriate laboratory, equipment and sample controls were analyzed. The completeness and reliability of the referenced information determine the validity of the analyses and conclusions drawn in this health consultation. The laboratory analyzed each water sample for arsenic, lead, chromium, dichloroethylene, methyl-tert-butyl ether, tetrachloroethylene, trichloroethylene, and vinyl chloride, among other organic compounds. FDOH focused on these specific chemicals since EPA and FDEP had previously detected each of these in the groundwater beneath the Callaway site (FDER, 1984; 1986; 1992; EPA, 1994). In addition, FDOH had chosen these compounds as the chemicals of concern in the public health assessment (FDOH, 2001).
All nine water samples contained detectable levels of arsenic. However, none of the arsenic levels exceeded the Florida drinking water standard. The arsenic levels are also within the range of what can normally be detected in Florida groundwater. Arsenic is a metal that naturally occurs and can be found in numerous mediums, including groundwater and soil. Two of the nine water samples contained chromium and four of the nine samples contained lead. The levels of these metals, like arsenic, do not exceed the respective Florida drinking water standard. In addition, the levels of chromium and lead in these samples are consistent with background concentrations in Florida groundwater. Chromium and lead, like arsenic, are naturally occurring metals that are commonly found in soils and groundwater. Table 2 summarizes the analytical results for each sample.
Only one of the nine well water samples contained any of the organic compounds detected in the groundwater beneath the Callaway site. Well #7, immediately south of the site, contained cis-dichloroethylene, methyl-tert-butyl ether, tetrachloroethylene, and trichloroethylene (Table 2). The laboratory detected each of these chemicals at a level below its Florida drinking water standard.
CHILDREN AND OTHER UNUSUALLY SUSCEPTIBLE POPULATIONS
The unique vulnerabilities of infants and children demand special emphasis in communities faced with the contamination of their environment. Children are at a greater risk than adults from certain kinds of exposure to hazardous substances. They are more likely to be exposed because they play outdoors and because they often bring food into contaminated areas. They are shorter than adults, which means they breathe dust, soil, and heavy vapors close to the ground. Children are also smaller, resulting in higher doses of chemical exposure per body weight. In addition, the developing body systems of children can sustain permanent damage if toxic exposures occur during critical growth stages. Most important, children depend completely on adults for risk identification and management decisions, housing decisions, and access to medical care. Children are a special consideration in regards to this site because children may be more sensitive to several of the contaminants that were previously detected. Children may absorb metals from the intestine more efficiently than adults and may be more sensitive to the toxicity of metals and chlorinated solvents. FDOH does not anticipate this site introducing a health risk specifically to children, since no completed exposure pathway is present. EPA has recently restricted access to the site and the levels of contaminants that are likely to migrate off of the site (i.e., solvents) are not likely to reach a potable well at a concentration that would likely result in a hazardous dose to a child.
To aid in identifying the extent of deep groundwater contamination, FDOH recommends that environmental agencies begin to regularly test the on-site Floridan aquifer well and the neighboring Floridan well immediately south of the site (Well #7). Although FDOH does not anticipate these solvents to cause illness in the future, regular testing of these deep wells will aid in monitoring the movement of the contaminants in the "potable" aquifer.
ATSDR (1998) Toxicological profile for chromium, Draft (Update). Agency for Toxic Substances and Disease Registry, U.S. Department of Health and Human Services.
ATSDR (1999a) Toxicological profile for arsenic (Update). Agency for Toxic Substances and Disease Registry, U.S. Department of Health and Human Services.
ATSDR (1999b) Toxicological profile for lead (Update). Agency for Toxic Substances and Disease Registry, U.S. Department of Health and Human Services.
EPA (1994) Expanded site inspection. Callaway and Son Drum Service. Lake Alfred, Polk County, Florida.
FDER (1984) Site Investigation Report #84-11. Callaway and Son Drum Reconditioning. Lake Alfred, Polk County, Florida.
FDER (1986) Groundwater investigation report number 86-15, Lake Alfred Fuel Spill, Polk County Florida.
FDOH (2001) Public Health Assessment: Callaway and Son Drum Service, Lake Alfred, Polk County, Florida. Cerclis No. FLD094590916.
FDER (1992) Phase II Site Inspection Report. Callaway and Son Drum Service. Lake Alfred, Polk County, Florida.
Florida Department of Health, Author
Davis H. Daiker, Ph.D.
Division of Environmental Health
Bureau of Environmental Epidemiology
ATSDR Reviewer:
Debra Gable
State Program Section
Division of Health Assessment and Consultation
Figure 1. Site and Well Locations
Table 1. Total Population Estimation Table
Pathway Types | Estimated Total Population in Potential Exposure Pathways* | Minimum Population* | Maximum Population* |
Potential Pathways On-site | 0 | 0 | 1-50 |
Potential Pathways Off-site | 1300 | 0 | 501-2500 |
Total Potential On and Off-site | 1300 | 0 | 501-2500 |
Completed Pathways On-site | 10 | 0 | 1-50 |
Completed Pathways Off-site | 0 | 0 | 0 |
Total Completed On and Off-site | 10 | 0 | 1-50 |
Potential and Completed Pathways On-site | 10 | 0 | 1-50 |
Potential and Completed Pathways Off-site | 1300 | 0 | 501-2500 |
Total Potential and Completed On and Off-site | 1310 | 0 | 501-2500 |
Table 2. Well Sampling Results (mg/L)
Contaminant | Std (mg/L)a | Well 1 | Well 2 | Well 3 | Well 4 | Well 5 | Well 6 | Well 7b | Well 8 | Well 9 |
Arsenic | 0.05 | 0.001 | 0.004 | 0.001 | 0.002 | 0.0008 | 0.0003 | 0.004 | 0.0009 | 0.001 |
Chromium | 0.1 | 0.001 | N.D. | N.D. | N.D. | N.D. | N.D. | 0.003 | N.D. | N.D. |
Lead | 0.015 | 0.002 | N.D. | 0.002 | 0.002 | N.D. | N.D. | N.D. | 0.0017 | N.D. |
cis-Dichloroethylene | 0.07 | N.D. | N.D. | N.D. | N.D. | N.D. | N.D. | 0.002 | N.D. | N.D. |
trans-Dichloroethylene | 0.1 | N.D. | N.D. | N.D. | N.D. | N.D. | N.D. | N.D. | N.D. | N.D. |
Methyl-tert-butyl ether | 0.05 | N.D. | N.D. | N.D. | N.D. | N.D. | N.D. | 0.0007 | N.D. | N.D. |
Tetrachloroethylene | 0.003 | N.D. | N.D. | N.D. | N.D. | N.D. | N.D. | 0.001 | N.D. | N.D. |
Trichloroethylene | 0.003 | N.D. | N.D. | N.D. | N.D. | N.D. | N.D. | 0.002 | N.D. | N.D. |
Vinyl Chloride | 0.001 | N.D. | N.D. | N.D. | N.D. | N.D. | N.D. | N.D. | N.D. | N.D. |
mg/L- milligrams per liter
N.D.- Not detected
a - Florida Department of Environmental Protection drinking water
standards
b - Value shown is the average of two determinations
Well 1 Heurman Road (southeast)
Well 2 East Lane (southeast)
Well 3 Mosley Road (southeast)
Well 4 Mosley Road (southeast)
Well 5 Mosley Road (southeast)
Well 6 Mallard (southeast)
Well 7 Lake Alfred Road (south)
Well 8 Glencruiten (southwest)
Well 9 Municipal Well (west)
ATSDR PLAIN LANGUAGE GLOSSARY OF ENVIRONMENTAL HEALTH TERMS
Revised -15 Dec 99
This Callaway and Son Drum Service Health Consultation was prepared by the Florida Department of Health under a cooperative agreement with the Agency for Toxic Substances and Disease Registry (ATSDR). It is in accordance with approved methodology and procedures existing at the time the public health assessment was begun.
Debra Gable, Technical Project Officer
Division of Health Assessment and Consultation
ATSDR
The Division of Health Assessment and Consultation, ATSDR, has reviewed this public health assessment, and concurs with its findings.
Richard Gillig,
Section Chief, SPS, SSAB, DHAC, ATSDR