AECOM Environment Figures January 2010

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1 AECOM Environment Figures January 2010

2 Figure 1 General Monitoring Approach Readville 5-Yard Site Dedham and Readville, MA Real-ime Monitoring Constituent-Specific Monitoring Conduct Field Screening for Indicator Parameter (dust) Collect Samples for Laboratory Analysis (lead, arsenic) Remediation Activities Compare to Action Levels Increase Levels of Emission Controls, if required Compare to Chemical-Specific Action Levels Modify Action Levels, if required Readville AMP Appendices and ables.xls/figure 2-1

3 ED SO NS D D RO R LD R EY VA LLA Approximate Limits of Excavation ER FIE NO LD RD AV LO NS DANNY R COMO R D VE CR OS S IL ON V IL PIN EF IEL WE M PIN Area 1 Orphan Line READ EA VE RD DL N PINEF IELD LE S QU YA CH E ER NE AK MI Area 4 Exclusion Zone C IN ION E INS MA R FLE Area 2 Western Fence Line NS R HC AS N BE MI JA E S OF UE BROOKLINE Site Property Line Stockpile Composite Sewer Line Approximate Limits of Excavation XRF Locations Gas Line Soil Boring Drain Line NEWON M Water Line Phase IV RIP MBA Readville 5-Yard Site BOON D HA 450 Air Quality Monitoring Location N EE Feet RA G 225 SP ON BO M A DEDH ED Map Document: (L:\work\105627\GIS\Readville\Maps\AQ_Monitoring_Locs.mxd) 1/13/ :55:06 PM RE Aerial photo supplied by MassGIS Date of photo: Area 3 Main Rail Yard Figure 2 Project Location ypical Air Monitoring Locations MILON Monitoring Well DEDHAM est Pit WEWOOD CANON QUINCY January 13, 2010

4 AECOM Environment Attachment A Air Monitoring Plan Amendment Form January 2010

5 AECOM Environment Air Monitoring Plan Amendment Amendment No.: Client: Project Number: Location: Date: Project Manager: Site Monitor: Amendment: Reason for Amendment: Signature Date: January 2010

6 AECOM Environment Attachment B Development of Site- Specific Acceptable Ambient Concentrations January 2010

7 Appendix B Acceptable Ambient Concentrations (AAC) Carcinogenic RBC Noncarcinogenic RBC AACs (RBC C ) (RBC NC ) Compounds µg/m 3 µg/m 3 µg/m 3 Arsenic 4.62E E E-01 Lead 2.01E (a) Noncancer RBC for Particulate Inhalation - Gastrointestinal Absorption & Pulmonary Absorption Noncancer RBC = RfD oral-subchronic ADD inh-gi H * + RfC inh-subchronic ADE inh-pulm ADD inh-gi = ADE inh-pulm = RCAF inh-gi * VR (2<3) * RAF nc-ing * EF * ED inh * EP * C1 * C2 * C3 BW * AP noncancer RCAF inh * RAF nc-inh * EF * ED inh * EP AP noncancer Cancer RBC from Particulate Inhalation - Gastrointestinal Absorption & Pulmonary Absorption 1 1 Cancer RBC = R * + LADDinh-GI * CSF oral LADEinh-pulm * UR inh LADD inh-gi = LADE inh-pulm = RCAF inh-gi * VR (2<3) * RAF nc-ing * EF * ED inh * EP * C1 * C2 * C3 BW * AP cancer RCAF inh * RAF nc-inh * EF * ED inh * EP AP cancer Notes: (a) he National Ambient Air Quality Standard for lead of 1.5 ug/m 3 is based on continuous 3-month exposure; therefore, it was not modified for this exposure scenario. (b) RBCs calculated for a resident between the age of 2 and 3 years since this is the most sensitive receptor and has the highest ventilation rate per body weight, and since the exposure period is anticipated to be only 182 days. Readville AMP Appendices and ables.xls/appendix B - Pg 1 Page 1 of 3

8 Appendix B Acceptable Ambient Concentrations (AAC) Parameter Value Units Notes UR inh - Inhalation Cancer Unit Risk chemical specific (μg/m 3 ) -1 MassDEP, Short Form for Human Health Risk Assessment under the MCP CSF - Cancer Slope Factor chemical specific (mg/kg-day) -1 MassDEP, Short Form for Human Health Risk Assessment under the MCP RfC - Reference Concentration chemical specific μg/m 3 MassDEP, Short Form for Human Health Risk Assessment under the MCP RfD - Reference Dose chemical specific mg/kg-day MassDEP, Short Form for Human Health Risk Assessment under the MCP LADE - Lifetime Average Daily Exposure chemical specific unitless ADE - Average Daily Exposure chemical specific unitless LADD - Lifetime Average Daily Dose chemical specific mg/kg-day * m 3 /μg ADD - Average Daily Dose chemical specific mg/kg-day * m 3 /μg EPC - Exposure Point Concentration chemical specific μg/m 3 Fenceline ambient air concentration. RAF c - Relative Absorption Factor for Cancer Effects chemical specific dimensionless MassDEP, Short Form for Human Health Risk Assessment under the MCP RAF nc - Relative Absorption Factor for Noncancer Effects chemical specific dimensionless MassDEP, Short Form for Human Health Risk Assessment under the MCP EF - Exposure Frequency event/day 5 events (days) / 7 events (days) in a week; MADEP 1995 Guidance for Disposal Site Risk Characterization pg B-37. Fugitive dust and indoor air. ED inh - Exposure Duration for inhalation exposure 0.5 day/event Represents 12 hours/event. Assumes 8 hr/day for excavation activities and additional 4 hours for construction-related dissipation of dust. EP - Exposure Period 182 days Anticipated duration of proposed remedial construction activities. C1 - Conversion Factor 1 1.0E-03 m 3 /L C2 - Conversion Factor 2 1,440 min/day C3 - Conversion Factor 3 1.0E-03 mg/μg BW (2<3) - Body Weight for age group 2< kg U.S. EPA Exposure Factors Handbook. able 7-7, females. AP (lifetime) - Averaging Period for lifetime 25,550 days Represents 70 years AP (noncancer) - Averaging Period for noncancer 182 days Anticipated duration of proposed remedial construction activities. VR(2<3) - Ventilation Rate average for age group 2< L/min able B-4 MADEP 1995 Guidance for Disposal Site Risk Characterization. RCAF inh-gi - Relative Concentration Adjustment Factor, gastrointestinal 1.5 dimensionless MADEP Characterization of Risks Due to Inhalation of Particulates by Construction Workers RCAF inh - Relative Concentration Adjustment Factor, inhalation 0.5 dimensionless MADEP Characterization of Risks Due to Inhalation of Particulates by Construction Workers H - arget Hazard Quotient 0.2 dimensionless MCP arget Hazard Quotient for Method 2 Risk Characterization (310 CMR ). R - arget Cancer Risk 1.0E-06 dimensionless MCP arget Cancer Risk Level for Method 2 Risk Characterization (310 CMR ). Readville AMP Appendices and ables.xls/appendix B - Pg 2 Page 2 of 3

9 Appendix B Acceptable Ambient Concentrations (AAC) Inh. Cancer UR Subchronic RfC Oral Cancer Slope Factor Subchronic Oral RfD RAFc-ing RAFc-inh RAFnc-ing RAFnc-inh Compounds (ug/m 3 ) -1 µg/m 3 (mg/kg-day) -1 mg/kg-day unitless unitless unitless unitless Arsenic 4.30E E E E Lead 1.00E E Notes: All values taken from MassDEP's Short Form for Human Health Risk Assessment under the MCP Readville AMP Appendices and ables.xls/appendix B - Pg 3 Page 3 of 3

Risk Assessment Report for AGSS-ICS

Risk Assessment Report for AGSS-ICS 1. INTRODUCTION This Risk Assessment evaluated the human health risks from exposure during and after application of AGSS-ICS. This information will determine whether AGSS-ICS used to treat soil will present