70-92 Boston Street - Phase 1 Initial Site Investigation and Tier Classification - Appendix A - January 2006 APPENDIX A
NUMERICAL RANKING. SYSTEM
SCORE SHEET
Massachusetts Department of Environmental Protection
Bureau of Waste Site Cleanup BWSC107A
NUMERICAL RANKING SYSTEM (NRS) SCORESHEET Release Tracking Number
Pursuant to 310 CMR 40.1511 (Subpart O) 3� - 24618
A. NRS SCORESHEET SUMMARY SECTION:
1.Classification Submittal:(check one) Q a. Initial NRS Score b. Revised NRS Score
2_ Disposal Site Score:
II 111 IV V VI Total
60 101 15 20 -0 196
3.Disposal Site Classification: .(check one)
a. Tier IA b. Tier IB c. Tier IC Q d. Tier 11
B. DISPOSAL SITE INFORMATION(NRS SECTION I):
1_ UTM Coordinates: .a. UTM N: 4709253 b. UTM E. 343094
2. Check which, if any,of the Tier I inclusionary criteria are met by the Disposal Site,pursuant to 310 CMR 40.0520(2):
n a. Groundwater is located within an Interim Wellhead Protection Area or a Zone II, and there is evidence of groundwater
I_I contamination by an Oil or Hazardous Material at the time of Tier Classification at concentrations equal to or exceeding
the applicable RCGW-1 Reportable Concentration set forth in 310 CMR 40.0360.
b.An Imminent Hazard is present at the time of Tier Classification.
C. EXPOSURE PATHWAYS(NRS SECTION II):
1. Exposure Pathways,and Oil and Hazardous Material(OHM)Sources:
For A.through D., score according to 310 CMR 40.151.2-Exposure Pathway Designation Criteria and NRS Table It.
For E.,score using NRS Table ILE.
Score
A.Soil(includes sediment) 15
B.Groundwater 20
C.Surface Water(includes wetlands) 0
D.Air. 0
E.dumber of OHM Sources 25
Total NRS Section II Score(15-700) 60
2. Was Section G(NRS Section VI)used to amend the score for this Section of the NRS? a.Yes 0 b. No
Revised: 02/10/2004 Page 1 of 5
Massachusetts.Department of Environmental Protection
Bureau of Waste Site Cleanup BWSC107A
NUMERICAL RANKING SYSTEM (NRS) SCORESHEET Release Tracking Number
Pursuant to 310 CMR 40.1511 (Subpart O) 3a - 2461 S
3. Summary Rationale for Exposure Pathway Values,A.through D.,and Phase I Report References:
A. Soil - VPH/EPH, PAHs in soil,. see Table 4; Site is fenced (see page 6-1 of Ph. 1)
B. Groundwater ' VPH in groundwater, see Table-5,ho drinking water wells, see
Figure 2. and page 6-1.C. Air -- Not anticipated. VPH appriox. 6 feet below grade at-
_ _ , and
D. Potential Sources - 20,000 qallon No. 6 Fuel Oil UST "4-car garage" area with
evidence of volatiles.
D. DISPOSAL SITE CHARACTERISTICS(NRS SECTION III):
1. Oil and Hazardous Material(OHM)Toxicity Score(NRS Section III.A.):
a. List the Four Highest OHM Toxicity Scores from NRS.Table III.A.:
OHM Scored Concentration and Media Toxicity Score(1 -80)
No. 6 Fuel Oil (as C11-C22 Aromatic) NAPL . 65
C11-C22 Aromatics 1,500 ug/g- Soil 25
C19-C36 Aliphatics 3,500 ug/g-Soil 20
C9-C18 Aliphatics 2,700 ug/g - Soil 20
b. Score using NRS Worksheet III.A.1_to determine the OHM Toxicity Score for OHM not listed in NRS Table III.A.:
OHM Human Health-based Concentration Concentration Toxicity
Toxicity Value (Soil-ug/g) (Water-ug/I) Score
Benzo(a)pyrene 44 3.6000 20
.Benzo(a)anthracene . 28 4.7000. 10
Benzo(b)fluoranthene 28. 5.1000 10
0
c. Use the Highest OHM Toxicity Score from either NRS Table III.A. or Worksheet III.A.1.:
OHM Scored Toxicity Score
No. 6 Fuel Oil (as C11-C22 Aromatic) 65
Revised: 02/10/2004 Page 2 of 5
Massachusetts Department of Environmental Protection-
Bureau of Waste Site Cleanup BWSC107A
FLL7 I-NUMERICAL RANKING SYSTEM (NRS) SCORESHEET Release Tracking Number
Pursuant to 310 CMR 40.1511 (Subpart O)
2.Multiple OHMs(NRS Section III.13):
Was the Toxicity Score of more than one OHM greater than or equal to 30? F1 a. Yes(30) rt_-�;j b. No(0)
3.OHM Mobility and Persistence(NRS Section III.C.):
Score according to 310 CMR 40.1514-OHM Mobility and Persistence
a.OHM Scored b.Score (0-50)
No. 6 Fuel Oil 20
4. Disposal Site Hydrogeology(NRS Section III.D.): Site Hydrogeology
Score(2-20)
.Score according to 310 CMR 40.1515-Soil Permeability,
and NRS Table III.D. 16
5.Total NRS Section III Score: B. C. D. Total for Section III
(3- 180)
65 0 20 16 101
6. Was Section G(NRS Section VI)used to amend the score for this Section of the NRS? a.Yes P b. No
E. HUMAN POPULATION AND LAND USES(NRS SECTION 11/):
1. Human Population(NRS Section IV.A.): Residential Population Institutions On-site Population
within 1/2 Mile within 500 Feet Workers Score (0-40)
Score using NRS Table IV.A.
15 0 0 15
2.Aquifers(NRS Section IV.B.):
a.Sole Source Aquifer: i.Yes(25) ii. Name: iii. No(0)
b.Potentially Productive Aquifer: ❑ i. Medium.or High(15) ii. No(0)
3.Water Use(NRS Section IV.C.): Proximity to Persons Served by Private Water Alternate Public Water
Score using NRS Table W.C. Public Drinking Public.Drinking Supplies Water Supply Use Score
Water Source Water Supply within 500 Feet Available (0-125)
0 0 0 0 0
4.Total NRS Section IV Score: Total for Section IV
A. B. C. (0-205)
15 0 0 15
5_ Was Section G(NRS Section VI)used to amend the score for this Section of the NRS? a a.Yes ® b. No
Revised: 02/10/2004 Page 3 of 5
Massachusetts Department of Environmental Protection
Bureau of Waste Site Cleanup BWSC107A
Release Tracking Number
NUMERICAL RANKING SYSTEM. (NRS) SCORESHEET -
Pursuant to 316 CMR 40.1511.(Subpart O) 30 - 24618
F..ECOLOGICAL POPULATION(NRS SECTION V):
1. Environmental Resource Areas(NRS Section V.A.): Score using NRS Table V.A.
Area of Critical Species of Special Concern, Wetlands,Certified Vernal Environmental
Environmental Threatened or Endan eyed Pool or Outstanding Fish Protected
9 g Resource Area
Concern Species Habitat Resource Water Habitat Open:Space Score(0- 150)
0 0 0 20 1 0 20
2. Environmental Toxicity Score(NRS Section V.B.):
Score only if Environmental Resource Area Score is greater than or equal to 30.
a. List the Three Highest Environmental Toxicity Scores from NRS Table V.B_:
OHM Scored Concentration and Media Toxicity Score
(0-35)
0
0
0
b. Score using NRS Worksheet V_13.1.to determine the Environmental Toxicity Score for OHM not listed in NRS Table V.B.
See 310 CMR 40.1516 for Environmental Toxicity Values for each OHM.
OHM Environmental Concentration Concentration Environmental
Toxicity Value (Soil-ug/g) (Water-ug/1) Toxicity Score
0
0
0
c: Use the Highest Environmental Toxicity Score from either NRS Table V.B.or from Workstieet V.13.1..
OHM Scored Toxicity Score
0
3. Total NRS Section V Score: A. B. Total for Section V
(0- 185)
20 0 20
4. Was Section G(NRS Section VI)used to amend the score for this Section of the NRS? El a.Yes b. No
Revised: 02/10/2004 Page 4 of 5
Massachusetts Department of Environmental.Protection
Bureau of Waste Site Cleanup 13WSC107A
NUMERICAL RANKING SYSTEM (NRS).SCORESHEET Release Tracking Number3❑ 24618
Pursuantto 310 CMR 40.1511 (Subpart O)
G. MITIGATING DISPOSAL SITE SPECIFIC CONDITIONS(NRS SECTION VI):
1. Disposal site-specific conditions that warrant amending the site score. Changes directly related to NRS Sections or
Subsection scores may not reduce the score more than the relevant subsection value assigned for the disposal site in that
subsection.-Section VI must reference specific pages.of the Phase[. Section VI may not exceed plus or minus 50 points and
may be scored only in 5-point increments.
2. Check here if additional pages are provided in an attachment.
Total Score
Section VI
3. Disposal Site Amendment (Not to exceed plus or minus 50 points): O
Revised: 02/10/2004 Page 5 of 5
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