LETTER WITH ATTACHMENT: REVISED PRELIMINARY REMOVAL …

THOMAS J. VILSACKGOVERNOR

SALLY J PEDERSONLT. GOVERNOR

Judy Facey, ToxicologistSite Assessment and Cost Recovery BranchSuperfund DivisionUS EPA, Region VII901 901 North 5th StreetKansas City, KS 66101

DEPARTMENT OF PUBLfCtt^LTHSTEPHEN C. GLEASON, D.O., D IRECTOR

RECEIVED

APR 19 2000SUPERFUO

Re: Revised Preliminary Removal Goals (PRGs)Former Diller Battery SiteDes Moines, IA

Dear Ms. Facey:

Enclosed pleased find two copies of the revised PRGs for the above referenced site. Therevision was done based on EPA requests dated on March 27. 2000.

The revised document deleted the PRGs for RME2 and 3, as well as the lead PRO for RME 5 foran open space land use. Please be advised that the revised PRGs for lead may not beprotective of human health for future construction workers and children play at the site.

I have enjoyed working with you on this site. If you have any questions or comments regardingthe information, please feel free to contact me at (515) 281-8707.

Sincerely,

Michelle X. Wei

Cc: Don Hamera, OSC

, \ J

S00114643SUPERFUND RECORDS

LUCAS STATE OFFICE BUILDING / 321 E. 12TH ST. / DES MOINES, IOWA 50319-0075DEAF RELAY ( H E A R I N G OR S P E E C H IMPAIRED) 1-800-735-2942 / INTERNET: HTTP:/ / IDPH.STATE.IA.us/____

EXECUTIVE STAFF DIRECTOR'S OFFICE515-281-5604 515-281-5605

FAX/515-281-4958 FAX/515-281-4958

FAMILY & COMMUNITY HEALTH515-281-3931

FAX/515-242-6384

ADMINISTRATION & REGULATORY AFFAIRS515-281-5784

FAX/515-281-4958

SUBSTANCE ABUSE & HEALTH PROMOTION515-281-3641

FAX/515-281-4535

Former Diller Battery Site Page 1 of pages 11

THOMAS J. VILSACKGOVERNOR

SALLY J. PEDERSONLT. GOVERNOR

MEMORANDUM

DATE:

TO:

FROM:

RE:

April 18,2000

OF PUBLIC HEALTHC. GLEASON, D.O , DIRECTOR

Judy Facey, ToxicologistSite Assessment and Cost Recovery BranchSuperfund Division, EPA Region VII

Michelle WeiIowa Department of Public Health

Preliminary Removal Goals (PRGs)Former Diller Battery SiteDes Moines, IA

RECEIVED

APR 19 2000SUPERFUND DIVISION

INTRODUCTION

The U.S. Environmental Protection Agency (EPA) and some of the current property owners,which include the City of Des Moines and Polk County, are considering the need for a removalaction at the above referenced site. The Iowa Department of Public Health (IDPH) was requestedto provide assistance in calculating Preliminary Removal Goals (PRGs) for the possible futureland uses. Since the future land uses have not been determined, the potential PRGs forresidential, an open space, parking lot, educational center, and commercial/industrial werecalculated. The EPA's Integrated Exposure Uptake Biokinetic Model (IEUBK) for lead inchildren, the U.S. Environmental Protection Agency (EPA) Methodology for Assessing RisksAssociated with Non-residential Adult Exposures to Lead In Soil, and Human Health EvaluationManual, Part B: "Development of Risk Based Preliminary Remediation Goals" were followed.

The draft PRGs were initially calculated in 1996. This is updated version based on the currentsampling data.

SITE BACKGROUND

The Former Diller Battery site is located at 701 Corning Avenue in Des Moines, I A, which is inPolk County (Figure 1: Site Location Map). The site is in the NW 1/4, SE 1/4, Section 27,Township 79 North, Range 24 West. The 1.5 acre site is bordered on the west by the RiverviewPark Lake, on the south by Corning Avenue, on the east by an alley, and on the north byresidential property (Figure 2: Site Map).

LUCAS STATE OFFICE BUILDING / 321 E. 12TH ST. / DES MOINES, IOWA 50319-0075DEAF RELAY ( H E A R I N G OR S P E E C H IMPAIRED) 1-800-735-2942 / INTERNET: H T T P : / / I D P H . S T A T E . I A . u s /

FAMILY & COMMUNITY HEALTH515-281-3931

FAX/515-242-6384

ADMINISTRATION & REGULATORY AFFAIRS515-281-5784

FAX/515-281-4958

SUBSTANCE ABUSE & HEALTH PROMOTION515-281-3641

FAX/515-281-4535

EXECUTIVE STAFF DIRECTOR'S OFFICE515-281-5604 515-281-5605

FAX/515-281-4958 FAX/515-281-495£

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Figure 2: SITE MAP

IDPH Former Diller Battery Site Page 2 of pages 11

The site is currently fenced and is not accessible to the public. Properties to the east and south ofthe site are commercial. The nearest residential property adjoins the site to the north, with theresidence approximately 60 feet from the site.

Diller Battery operated a lead-battery factory on the site from 1946 to 1952. In 1953, the facilitywas operated jointly by Diller Battery and Span-O-Life Battery, and by Span-O-Life Battery onlyin 1954. From 1955 to 1964 the Hunter Manufacturing Company manufactured beds at the site.The property was vacant from 1965 to 1984. The only structure on the property is an 8- by 14 -foot metal storage building. A concrete pad covering approximately 19,000 square feet is locatedin the southeast portion of the property. The condition of the pad is varied. The site is partiallyvegetation covered. Four different property owners own the site, which including the City ofDes Moines, Polk County, Union Pacific Railroad, and Barbara Redshaw of Des Moines (Figure3).

On June 21, 1995, a city zoning inspector observed lead inbeded in the concrete pad at the siteand reported the findings to the Des Moines Environmental Health Department (DMEHD). TheIowa Department of Natural Resources (IDNR) was then contacted and a site investigation wassubsequently conducted. The IDNR site investigation included a site reconnaissance of surfacesoil samples. The site was divided into four areas and a composite surface sample was collectedfrom each of the areas. The samples were analyzed for total lead by the IDNR laboratory. Theanalytical results for the composite samples indicated that elevated concentrations of lead werepresent, ranged from 660 mg/kg (Southeast Quadrant) to 4500 mg/kg (Southwest Quadrant).The EPA was then contacted by the IDNR and the Ecology and Environment, Inc. (E & E),Superfund Technical Assessment and Response Team (START) was subsequently tasked toconduct an Integrated Site Assessment (ISA) at the site.

START conducted ISA on June 26 & 27, 1996. A 25-foot grid was established over the entirearea and an X-ray fluorescence spectrometer (XRF) was used to systematically screen the surfacesoil to determine the extent of the lead contamination on each of the parcels that made up thesite. Soil samples were collected and submitted to the EPA Region VII laboratory for totalmetals analysis for locations identified by the XRF as having elevated lead concentrations (seeFigures 4 & 5). Additional soil was collected for semi-volatile and volatile organic compound(VOC) analysis from these same locations.

In addition, the Geoprobe™ was used to collect soil samples from below the paved area of thesite and from a location where elevated levels of lead were indicated by the XRF. These soilsamples were screened with the XRF to assess lead contamination at depths. XRF results at onelocation indicated that elevated lead concentration is present at a depth of 12 inches below theground level.

Elevated concentrations of metals, including lead up to 8,660 mg/kg, were detected in surfacesoil on the site. Polynuclear aromatic hydrocarbons (PAHs) at levels that exceeded health-basedbenchmarks were also found on soil samples collected on and off the site. However, the highestPAH concentrations were detected in soil on site. No sample collected on site contained anydetectable concentrations of VOCs.

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TOO: S07-9602-C02CPAN: CQS2FDSCXX

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Former Oilier BatteryDes Moines, Iowa

TDD: S07-9602-OO3CPAN: COS3FDSCXX

Prepared by STM L.J.3aerAugust 1996

Source: Polk Counry Assessors C(?ice.

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IDPH Former Diller Batterv Site Page 3 of pages 11

In September 1998, EPA issued an administrative order on consent and agreement for theperformance of an Engineering Evaluation / Cost Analysis (EE/CA) to three potentiallyresponsible parties (PRPs): Union Pacific Railroad Company and City of Des Moines. The PRPscontracted Burns & McDonnell (B&M) Waste Consultants, Inc., to prepare the EE/CA. Tofurther characterize the site, ninety-seven surface soil samples ( 0 - 3 inches), four sedimentsamples, three background samples, and five concrete chip samples were collected and analyzedfor heavy metals and PAHs. Arsenic, lead, and carcinogenic PAHs were detected at above soilscreening levels at various locations. In addition, antimony and total chromium was alsodetected at above the soil screening levels at one location.

Overland flow of water from the site appears to be toward the lajce, which is used for fishing andrecreation. However, no drainage pathways were observed during ISA. All drinking water in thearea is supplied by the city of Des Moines. The municipal wells are located up-gradient andapproximately 3.5 miles southwest of the site.

No future land use has been set for the site. The Kiwanis Club proposed to build anenvironmental training center before the contaminants were detected. The Kiwanis Club plan iscurrently on hold. For the PRGs calculation, five potential future land uses, includingresidential, an open space, parking lot, environmental training center, and commercial/industrial,were considered.

CHEMICALS OF POTENTIAL CONCERNS (COCs)

Based on the data collected, chemicals found above the EPA Region IX soil screening levels areselected as COCs for the site. The following COCs are identified with a brief explanation as towhy each chemical was included:

TABLE 1 Summary of Chemicals of Potential Concern at the Site

ChemicalAntimonyArsenicTotal ChromiumLeadBenzo(a)anthraceneBenzo(a)pyreneBenzo(b)fluorantheneBenzo(k)fluorantheneChryseneDibenz(ah)anthraceneIndeno( 1 ,2,3-cd)pyrene

Rational (media of contaminant detected)SoilSoilSoilSoilSoilSoilSoilSoilSoilSoilSoil


REASONABLE MAXIMUM EXPOSURE SCENARIOS (RME)

The RME is an estimate of the highest exposure that is reasonably expected to occur at a site.Exposure to a contaminant is defined as the contact of a receptor with a contaminant. Forexposure to occur, there must be a source of contaminant (e.g., contaminated soil), a receptor (aperson), and a mechanism (pathway) for the contaminant to reach the receptor (such as a persondrinking the contaminated ground water). The potentially contaminated media include surfaceand subsurface soils. Potential human receptors include future on-site residents, future on-sitecommercial / industrial workers, and residents use the area as an open space. Only incidentalingestion of soil was considered as the potential exposure pathways for the site at this time.

Three potential RME scenarios were considered. RME1, a 70 kg future on-site worker works atthe commercial/industrial area, 250 days per year and was exposed to contaminants by incidentalingestion of soil at the rate of 50 mg/day over a period of 25 years of his or her life time. RME2,future on-site residents were exposed to the contaminated soil over a period of 30 years. Twoexposure groups-children of one to six years old and others of seven to 31 years old due todifferent soil ingestion rate for children and adults were considered. For the contaminant lead,the IEUBK model was used to assess children of 84 month old or less. RME3, a person use thearea as an open space or a recreational area (such as biking, walking) at the site, 5 hours per weekfrom April to November (one hour per weekday, 35 weeks per year, 175 hours/year).

METHODOLOGY

The IEUBK Model for lead in children is a standing alone, PC compatible software package. Itallows the user to estimate, for a hypothetical child or population of children, a plausibledistribution of blood lead concentrations centered on the geometric mean blood leadconcentration predicted by the model from available information about children's exposure tolead. From this distribution, the model calculates the probability that children's blood leadconcentrations will exceed the user selected level of concern (default 10 ug/dL). The user canthen explore an array of possible changes in exposure media that would reduce the probabilitythat blood lead concentrations would be above this level of concern. It is designed to modelexposure from lead in air, water, soil, dust, paint, diet, and other sources with pharmacokineticmodeling to predict blood lead levels in children 6 months to 7 years old.

Blood lead concentrations are not only indicators of recent exposure, but also are the most widelyused index of internal lead body burdens associated with potential health effects. Health effectsof concern have been determined to be associated with childhood blood lead concentrations at orbelow 10 ug/dL (U. S. Environmental Protection Agency, 1986, 1990; CDC, 1991). Theprobability that children will have blood lead levels exceeding this level of concern is animportant consideration for a risk assessor in compiling and evaluating all information applicableto a site to enable cleanup decisions.

The IEUBK Model was applied to determine soil lead concentrations for which a removal actionis considered in order to reduce the likelihood of exceeding a blood lead level of concern(LOC=10 ng/dL) to the user-defined risk of exceedance (ROE=5.00%) of the LOG at the site.


The EPA Methodology for Assessing Risks Associated with Non-residential Adult Exposures toLead in Soil was applied for RME1. The approach utilized a methodology to relate soil leadintake to blood lead concentrations in women of child-bearing age. The target blood leadconcentration is intended to protect against developmental effects of lead that might result fromthe exposure of a fetus to lead in uiero when a pregnant woman works at the site.

The surface soil risk-based Preliminary Removal Goals (PRGs) other than Lead were calculatedusing EPA's Risk Assessment Guidance for Superfund (RAGS), Volume I, Part B. PRGs werecalculated based on a 10"6 cancer risk level and a hazard quotient (HQ) of 0.1 for soil incidentalingestion pathways. Some of the COCs (such as Arsenic) at the site are potential carcinogens.Carcinogens may also cause non-carcinogenic effects to certain exposed individuals. When itwas possible, both a carcinogenic and a non-carcinogenic risk-based PRGs were calculated for aparticular chemical.

For the oral ingestion pathway, a "Reference Dose"(RfD) and a "Slope Factor" (SF) were usedfor non-carcinogenic and carcinogenic cleanup level calculations, respectively. In general, theRfD is an estimate (with uncertainty spanning perhaps an order of magnitude) of a dailyexposure to the human population (including sensitive subgroups) that is likely to be without anappreciable risk of deleterious effects during a lifetime. RfD can also be derived for the non-carcinogenic health effects of compounds which are also carcinogens. The SF is a numericrepresentation of the potential for chemicals to cause excess cancer (above background) in theexposed human population. Both RfDs and SFs were obtained from either EPA IRIS, the HealthEffects Assessment Summary Table (HEAST), or the National Center for EnvironmentalAssessment (NCEA). Table 2 summarizes the RfDs and SFs used for the human health risk andPRG calculations and their sources.


Table 2. Summary of Reference Doses and Slope Factors Used in PRG Calculations

Chemicals

Antimony

Arsenic

Chromium III

Chromium VI

Benzo(a)anthracene

Benzo(a)pyrene

Benzo(b)fluoranthene

Benzo(k)fluoranthene

Chrysene

Dibenz(ah)anthracene

Indeno( 1,2,3 c-d)pyrene

Chronic toxicity

RfD (mg/kg-day)

4.0E-04

3.0E-04

1.5

3.0E-03

•

-

-

-

-

•

~

Critical effect

Longevity, bloodglucose andcholesterolkerotosis,hyperpigmentationNo effects .observedNo effectsobserved

-

-

-

-

-

-

—

Carcinogenicity

oral slopefactor (permg/(kg/day))

1.5E+00

-

-

7.30E-01

7.30E+00

7.30E-01

7.30E-02

7.30E-03

7.30E+00

7.30E-01

ERA weight -ofevidence classification

A, humancarcinogen

-

-

B2, probable humancarcinogenB2, probable humancarcinogenB2, probable humancarcinogenB2, probable humancarcinogenB2, probable humancarcinogenB2, probable humancarcinogenB2, probable humancarcinogen

Source

IRIS

IRIS

IRIS

IRIS

NCEA

NCEA

NCEA

NCEA

NCEA

NCEA

NCEA

CALCULATIONS AND RESULTS

The EPA's Integrated Exposure Uptake Biokinetic Model (IEUBK) for lead in children and theEPA Methodology for Assessing Risks Associated with Non-residential Adult Exposures to Leadin Soil were used for PRGs calculation for Lead. The surface soil risk-based PreliminaryRemoval Goals (PRGs) other than Lead were calculated using EPA's Risk Assessment Guidancefor Superfund (RAGS), Volume I, Part B. PRGs were calculated based on a 10"6 cancer risklevel and a hazard quotient (HQ) of 0.1 for soil incidental ingestion pathways. Some of theCOCs (such as Arsenic) at the site are potential carcinogens. Carcinogens may also cause non-carcinogenic effects to certain exposed individuals. When it was possible, both a carcinogenicand a noncarcinogenic risk-based PRGs were calculated for a particular chemical.

For Commercial/Industrial land use, it was assumed that a 70 kg future on-site worker works250 days per year, and was exposed to contaminants by incidental ingestion of soil at the rate of50 mg/day over a period of 25 years of his or her life time. The calculation results aresummarized in Table 3.

IDPH Former Oilier Battery Site Page 7 of pages 11

Table 3 Summerv of PRGs Calculation Results for Commercial/Industrial land Use

ContaminantsAntimonyArsenicChromium IIIChromium VILeadBenzo(a)an thraceneBenzo(a)pyreneBenzo(b)fluorantheneBenzo(k)fluorantheneChryseneDibenz(ah)anthraceneIndeno( 1,2,3 c-d)pyrene

PRGs in mg/kg (HQ-0.1, TR=10'6)81.83.8

30700061313547.8

0.787.8

78.47840.787.8

For the residential land use, it was assumed that the resident was exposed to contaminated soilover a period of 30 years. Two exposure groups - children of one to six years old and others ofseven to 31 years old due to the different soil ingestion rate for children and adults wereconsidered. It was assumed that the children group was exposed to the contaminated soil at therate of 200 mg per day over a period of 6 years, and the other group was exposed to thecontaminated soil at the rate of 100 mg per over a period of 24 years. For lead, the IEBUKmodel was used to assess children of 84 month old or less. The calculation results aresummarized in Table 4.

Table 4 Summery of PRGs Calculation Results for the Residential Land Use

ContaminantsAntimonyArsenicChromium IIIChromium VILeadBenzo{ a )an thraceneBenzo(a)pyreneBenzo(b)fluorantheneBenzo(k)fluorantheneChryseneDibenz(ah)an thraceneIndeno( 1,2,3 c-d)pyrene

PRGs in mg/kg (HQ=0.1, TR=10^)11

0.4341200

82.34200.880.0880.888.888

0.0880.88

For the open space land use, it was assumed that a person uses the area as an open space or arecreational area (such as biking, walking) at the site, 5 hours per week from April to November(35 weeks per year, 175 hours/year) over a period of 30 years. Two exposure groups - childrenof one to six years old and others of seven to 31 years old due to different soil ingestion rate for

IDPH Former Diller Battery Site Page g ofpages II

children and adults were considered. It was assumed that the children group was exposed to thecontaminated soil at the rate of 200 mg per day over a period of 6 years, and the other group wasexposed to the contaminated soil at the rate of 100 mg per over a period of 24 years.

Table 5 Summery of PRGs Calculation Results for the Recreational Land Use

ContaminantsAntimonyArsenicChromium IIIChromium VIBenzo(a)anthraceneBenzo(a)pyreneBenzo(b)fluorantheneBenzo(k)fluorantheneChryseneDibenz(ah)anthraceneIndeno( 1 ,2,3 c-d)pyrenc

PRGs in mg/kg (HQ=0.1, TR^IO"6)26310.2

988000198021.12.1

21.1211

21102.1

21.1

UNCERTAINTY

Inhalation and dermal exposure pathways were not considered for the PRO calculations, it mayresult in PRO underestimation. However, the site is partially vegetation and concrete padcovered, the exposure from inhalation and dermal pathways may not be significant enough tochange the PRGs by an order of magnitude.

The possibility of using the land as a future playground for children was not considered in thisdocument. If the land would be used as a future playground for children, the PRGs forcontaminants at the site should be set as the same as those for RME2 (see table 4), that would bethe same as the future residential land use.

The PRGs for potential exposure scenarios for a construction worker (a pregnant woman) and achild used the area as an open space were not calculated for the contaminant lead. The futurePRG for lead may not be protective for future construction workers or children play on thesite if the PRG for lead for commercial/industrial land use were selected for the site.


REFERENCE

Kozel, Ron, September 18, 1995, Iowa Department of Natural Resources, Emergency Response,Correspondence to Ron McChutcheon, U.S. EPA, Region VII.

Recommendation of the Technical Review Workgroup for Lead for an Interim Approach toAssess Risks Associated with Adult Exposures to Lead in Soil, EPA, December 1996.

Review of a methodology for establishing risk-base soil remediation goals for commercial areasof the California Gulch site, U.S. EPA Technical Review Workgroup for Lead, October 1995.

Ecology and Environment, Inc, October 18, 1996, Memorandum to Paul Doherty, EPA RegionVII, Integrated Site Assessment Report: Former Diller Battery Site, Des Moines, IA

EPA Guidance Manual for the Integrated Exposure Uptake Biokinetic Model for Lead inChildren, EPA 540-R-93-081, PB93-963510, February 1994

David H. Monroe, Toxicologist, February 10, 1997, Memorandum to Susan Klein, EPA RegionVII, Comments on PRGs for the Former Diller Battery Site, Des Moines, IA.

Ecology and Environment, Inc, June 30, 1999, Memorandum to Paul Doherty, EPA Region VII,Potentially Responsible Party Contractor Oversight at the Former Diller Battery site in DesMoines, IA

IDPH Former Diller Banerv Site Page 10 of pages 11

Attachments

PRGs Calculation Results using the IEUBK Model for surface soils contaminated with lead

PRGs was calculated using the IEUBK Model. Default values were used to run the Model (seeattachment). The cutoff blood lead level of concern (LOG) is 10 ug/ dL, and the user definedrisk of exceedance (ROE) of the LOG is 5.00%'. The target soil lead concentration for the site asa residential area is 420 ug/g (ppm). The Model run results are indicated in the following tablesand graphs.

Table 1. Range Finding Run for Target Soil Lead Concentration (plot 1)

overlay plot

1234567

soil lead concentration (|ag/g)

300383467550633717800

probability of exceeding1 O^g/dL, percent

2.874.426.038.2510.6112.8115.45

Table 2 Focused Run for Target Soil Lead Concentration (plot 2)

overlay plot

1234567

soil lead concentration (ng/g)

350383417450483517550

probability of exceeding10u,g/dL, percent

3.674.425.005.676.427.288.25

IDPH Former Diller Batterv Site Page II of pages 11

Table 3. Verification Run for Target Soil Lead Concentration (plot 3)

overlay plot

1234567

soil lead concentration (ug/g)

385391397403408414420

probability of exceeding10|ag/dL, percent

4.424.424.704.704.705.05.0

"The probability of exceeding the lead level of concern (10 ng/dl) is 5.00% of thechildren population aged seven years old and less at the targeted soil lead concentration.

(1) Land use: Residential land use (RME2)

Assumption: IEUBK model default values were used

PRG for Lead = 420 ug/g (based on IEUBK Model Run result)

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4.42X4.7 ax4.7BX4.78X

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4 « 8 10 12 14 16 18 28 22 24BLOOD L£A9 CONCENTRATION <us-/«U.>

a to 84 Months

3 <"-c

IDPH Bernstein Salvage Site. Oskaloosa. (A Print Date 04/18/2000

Table 1 Summary of Calculation Results for Industrial/Commercial Land Uses (RME1)Former Diller Battery Site, Des Moines, IA

PbBfetal .095

ng/dL101010

. 101010

/^cnV645GSD | .dm,

dimension-less

1.81.81.82.12.12.1

"MetaVmalBmal

dimension-less

0.90.90.90.90.90.9

PbB.^0

M9/dL

1.72.02.21.72.02.2

BKSFng/dL perMg/day

0.40.40.40.40.40.4

AF.dimension-less

0.120.120.12.0.120.120.12

AT

days

365365365365365365

IR.

g/day

0.050.050.050.050.050.05

EF.

day/year

250250250250250250

RBRG

ng/g (ppm)

153613541232960778656

jal to or tots than 10ucydL

Exposure scenario considered: a 70kg child bearing age or pregnant female workerworks at the site 250 days per year for the continuing long term exposures.Equations us«d for the above calculations:

RBRG - (PbB.smeMra - PbBadJl<)rAT/(BKSF*AF,*IR,<rEF.)

PbB.ajtc.nrt * PbEJfcui o oj/GSD i.eduHs*R«etaymelemel

Where.Pce . a,,«*Sm percenble bkxxl lead concentration (wcydL) among fetuses bom to women having exposures to In* specified site tot concentrat

GSO' **, .. -Esunaled value of the ndhndual geomeliic standard deviation of PbB among • popuMnn of pregnant women of child beamg age exposed to lead at In* Me

Value of 1 8 • recommended for a more homogeneout population white 2 1 i« recommended for a drvene. i*t>an population

P -f-nr~>*r* of pToportionakty belween fetal blood lead concentration at brth and maternal bbod concentration. 0 9 M the defauft value

PbB—.-Tvpgei bkxxl lead conoenlraoon n women of child beanng age n the absence of expo*ure< to laad-contamnated toil and duct from the Me activity

Aflnuke rate of ao4 ncludng tot contaned n ndoor duet. SO mo/day default

BKSF-B<*ne<c wipe factor nlanx) ncr«an n typical adult blood lead to average daily lead uptake (pg/dL blood lead rcreeM par ufl/day tead),0 4 defau*.

AF.'Abtolute gartrorteXmal abeorpbon fraction tor ngetted lead n tol and lead n duet derived from tot, 0 12. defaul value

AT'Averagng tme. 365 day*, defaul

IR,*lntake rate of tot. ncludng tot contaned n ndcor dud. 90 mg/oey .dafaut

EF.'Expoaura frequency for contact wilh anetied tot* anoVor duet derived n pan from (hate dust 250 dayt/year defau*

RBRG-Rak baaed remedution goal for the antfmeoc mean concentration of lead n and (»igrg) at the Me where exposure occurs

Page 1

IDPH Former Diller Battery Site Print Date: 04/18/2000

Table 2 Summary of Calculation Results for Commercial/Industrial Land Uses (RME1)

Former Diller Banery Site. Des Moines, IA

Chemicals

Unit

Antimony

Arsenic

Chromium III

Chromium VI

9enzo(a)anthraccnc

3enzo<a)pyrenc3cnzo(b)fluoranthenc

3enzo( k )fl uoranthene

Chrysene

)ibenz(ah)anthracene

lndcno( 1 ,2,3-cd)pyrene

RID

mg/kg-day

400E-04

3JOOE-04

I.50E-HX)

3.00E-03

-

-

-

-

-

-

-

SFo

(mg/Vg-<lay)'-

1.50E+00

-

-

7.30E-01

7.30E+00

7.30E-OI

7.30E-02

7.30E-03

730E+00

7.30E-01

EF

days/year

250

250

250

250

250

250

250

250

250

250

250

ED

yean

25

25

25

25

25

25

25

25

25

25

25

»*«„

mg/day

50

50

50

50

50

50

50

50

50

50

50

BW

kg

70

70

70

70

70

70

70

70

70

70

70

PRG,TH1=0.1

mg/kg

8.18E+01

6.13E+01

3.07E+05

6.13E+02

-

-

-

-

-

-

-

PRGK

TR'10"6

mg/kg

-3.82E+00

-

-

7.84E+00

7.84E-01

7.84E+00

7.84E+OI

7.84E+02

784E-01

7.84E-KX)

PRG«TR-IO5

mg/kg

-3.82E+OI

-

-

7.84E+01

7.84E+00

7.84E+OI

7.84E+02

7.84E+03

7.84E-KX)

7.84E-H)!

Exposure scenario considered: a 70kg commercial/Industrial worker works at the site 250 days per year over period of 25 years of his or her life.

Note: Formulas used for the above calculations:

PRGcc (mi/kg; TR-10*>-TR*BW«AT«365/(EF«ED*SFo'IO\tymf«IRs«l)

j; TH1-0 1>-THJ*AT*BW«

where:IR ^j / ingestion rate for soil, 50 mg/day, RfD/oraJ chronic reference dose (mg/kg-day), chemical specific;

cc/carcinogenic effects due to direct soil ingestion; nc-'noncarcinogenic effects due to soil ingestion; exposure frequency (EF)=250 days/year;

AT/average time, 25 yean for noncarcinogenic effects, 70 yean for carcinogenic effects; SFj/oraJ cancer slope factor^ mg/kg-day)"1, chemical specific;

TRAarget cancer risk, 1 O^THl/target hazard index, 0.1

PRGs/preliminary remedial goals

Page 2

IDPH Former Diller Batlcrv Site PnntDate 04/18/2000

Table 3 Summary of Calculation Results for the Residential Land Uses (RME2)

Former Diller Battery Site, DCS Moines, IA

Chemicals

Unit

AntimonyArsenic

Chromium III

Chromium VI

Beruo(a)anthracene

Benzo(a)pyreneBenzo(b)fluoranthene

9enzo(k)fluoramhene

Chrysene

Dibenz(ah (anthracene

ndemX 1 .2,3-cd)pyrene

RfD

mg/kg-day

4.00E-04

3.00E-04

I.50E+00

3.00E-03

-

-

-

-

-

-

-

SFo

(mg/kg-day)''

-

1.50E+00

-

-

7.30E-OI

7.30E+00

7.30E-01

730E-02

7.30E-03

7.30E+00

7.30E-01

EF

days/year

-

350

350

350

350

350

350

350

350

350

350

'F|o.l<«dj

mg-yr/kg-day

114

114

114

114

114

114

114

114

114

114

114

PRG«TH1=0 1

mg/kg

1.IOE+01

8.23E-KX)

4.12E-KM

8.23E+OI

-

-

-

-

-

-

-

PRG«TR=10"

mg/kg

-

4.27E-01

-

-

8.77E-01

8.77E-02

8.77E-01

8.77E-KX)

8.77E+01

8.77E-02

877E-01

PRG«TR=10!

mg/kg

-

4.27E+00

-

-

8.77E+00

8.77E-01

8.77E+00

8.77E+01

8.77E+02

8.77E-OI

8.77E+00

Exposure scenario considered: on-slte resident was exposed to contaminants 350days per year over a period of 30 years.

Note: Formulas used for the above calculttions:

PRGcc (mg/lj; TR-10*)-TR'AT*365/(EF<SF.<10^g/mg*IF-to4)

g; THI-0.1)-TH1*

where:IF K -) /age-adjusted ingestion factor, 114 mg-yr/kg-day, RfD^oral chronic reference dose (mg/kg-day), chemical specific;

cc/carcinogenic effects due to direct soil ingestion; nc/noncarcinogenic effects due to soil ingestion; exposure frequency (EF>*350 days/year;

AT/average time, 30 yr for noncarcinogens, 70 years for carcinogens ; SF^oral cancer slope factor( mg/kg-day)'1. chemical specific;

TR/target cancer risk, 10"*; THI/target hazard index, 0 1


PageS

IDPH Former Diller Battery Site Print Date 04/18/7000

Table 4 Summary of Calculation Results for the Recreational Land Uses (RME3)

Former Diller Battery Site, Des Moines, IA

Chemicals

Unit

Antimony

Arsenic

Chromium III

Chromium VI

Benzo(a)anthracene

Benzo(a)pyreneBenzo(b)fluoranihene

3enzo(k )fl uoranthene

Chrysene

3ibenz(ah)anthracene

IndemX 1 .2.3-cd)pyrenc

RfD

mg/kg-day

4.00E-04

3.00E-04

I.50E+00

3.00E-03

-

-

-

-

-

-

-

SFo

(mg/kg-day)'1

-

1.50E-KX)

-

-

7.30E-01

7.30E+00

730E-OI

7.30E-02

7.30E-03

7.30E+00

7.30E-01

EF

days/year

-

350

350

350

350

350

350

350

350

350

350

IFral/-l

mg-yr/kg-day

114

114

114

114

114

114

114

114

114

114

114

PRG.C TH1-0 1

mg/kg

263E+02

. 1.98E+02

988E+05

1 .98E+03

-

-

-

-

-

-

-

PRG«TR-IO"*

mg/kg

-

1.02E+01

-

-

2.11E-H)!

2.11E+00

2.1IE+01

2.1IE+02

2.11E+03

2.I1E-KX)

2 1IE+01

PRG«TR-10''

mg/kg

-

1 .02E-K)2

-

-

2.I1E+02

2.I1E-KH

2.1IE+02

2.11E+03

2.11E+O4

2.11E-K)!

2.11E+02

Exposure scenario consldvred: a p*rson uses th* site as an opsn spac* or recreational area, spends S hours per week on sit*

over a period of 30 years of his or her life time.

Note: Fonnulas used for the above calculations:

PRGcc (mg/kj; TR-IO*)-TR>AT*365<TF/(EF«SF.MO-^ti^ng«IF_a^)

PRGnc<nig/kg. TW-0. 1 >-THrAT»365 <tays/yr«TT:/(EF« 1/R1D.« l

where:IF ,al^l /age-adjusted ingestion factor, 1 14 mg-yr/kg-day, RfD^oral chronic reference dose (mg/kg-day), chemical specific;

cc/carcinogcnic effects due to direct soil ingestion; nc/noncarcinogenic effects due to soil ingestion; exposure frequency (EF)-350 days/year;

AT/average time, 30 yr for noncarcinogens, 70 years for carcinogens ; SF,/oral cancer slope factor! mg/kg-day)"1, chemical specific;

TR/target cancer risk, 10"*, THl/target hazard index, 0.1, TF/time weighted factor


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