casmalia site remediation projectsemspub.epa.gov/work/09/1159815.pdfcasmalia site remediation...

CASMALIA SITE REMEDIATION PROJECT Corey Bertelsen Project Manager June 4, 2016 To: Russell Mechem – EPA

Mark Samolis – EPA Subject: 2016 Soil Vapor Monitoring Results The Casmalia Steering Committee (CSC) has been performing soil vapor monitoring at the Casmalia site since 2009 in accordance with the requirements of the final Sampling Plan for Soil Gas Monitoring (April 6, 2009). That Sampling Plan required that the CSC …”document the results of the Soil Vapor monitoring in a memorandum that will be provided to EPA on a yearly basis after the sampling is completed and data is available.” The plan also noted that we would conduct the soil vapor sampling for five years (i.e. through 2014). The CSC agreed with EPA to continue the soil vapor sampling beyond the five years but as part of that to only sample once a year and to document those results in simplified report. To comply with that we have attached a report from GeoSyntec (who completed the 2016 annual sampling in May of this year) that summarizes this year’s soil vapor sample results and compares those to previous years. As you can see the 2016 results continue to remain consistent with the 2009-2014 and 2015 soil vapor sampling. regards,

Corey Bertelsen Casmalia Project Coordinator Attachments GeoSyntec Report - 2016 Soil Vapor Sampling cc Jim Dragna – Morgan Lewis

Scott Mansholt – Chevron Dave Roberson - ExxonMobil

Jill Tracy - Sempra Casmalia Office San Luis Obispo Office 3401 NTU Road 3575 Camino Purisima Casmalia, CA 93429 Arroyo Grande, CA 93420

SEMS-RM DOCID # 1159815

Casmalia Site Soil Vapor Monitoring Report – 2016 June 2016

Page 2

Sampling Methodology

Field sampling methodology was performed consistent with previous field implementation and in accordance with the Sampling Plan [CSC, 2009] and the joint DTSC and Regional Water Quality Control Board Advisory on Active Soil Gas Investigations [DTSC/LARWQCB, 2003; DTSC/Regional Board, 2015]4.

Soil vapor samples were collected from three soil vapor probes (RISVCL-03C, -05C, and -08C) located at the northern perimeter of the Site (Figure 1). Samples were collected in 1-L Summa canisters fitted with a flow controller provided by Eurofins Air Toxics, Inc. In addition to helium introduced to the sampling system during purging activities and monitored in the field, isobutane (shaving cream) was used as an additional leak check tracer5 during the sampling activities and analyzed in the laboratory.

For quality assurance/quality control (QA/QC) purposes, a field duplicate sample was collected from RISVCL-05C. A trip blank was included with the sample shipment; however, a significant difference between the field measured vacuum and the laboratory measured vacuum on the canister indicated a leak may have occurred during transport. Therefore, the trip blank was not analyzed.

The collected soil vapor samples were submitted to Eurofins Air Toxics, Inc., a NELAP (National Environmental Laboratory Accreditation Program) accredited laboratory under standard chain-of-custody protocol. Samples were analyzed for VOCs by USEPA Method TO-15 and isobutane by ASTM D-1945.

Analytical Results

The analytical data reported for the samples collected in spring 2016 are presented in Table 1. Laboratory analytical reports for this event are included in Attachment A. These results are discussed in more detail below.

4 DTSC/LARWQCB, 2003 and 2015. Advisory – Active Soil Gas Investigations, January 28, 2003 and July 2015. 5 The source concentration of isobutane was measured from an air sample collected from a trash bag holding shaving cream containing isobutane. The documentation and results of this leak compound analysis were provided in Attachment C of the Final Remedial Investigation Report, [CSC, 2011].


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Spring 2016 Sampling Event

Four soil vapor samples, RISVCL-03C, RISVCL-05C, RISVCL-05C-DUP, and RISVCL-08C were collected on May 5, 2016. Twelve VOCs were detected including 1,3-butadiene, 2-propanol, acetone, benzene, butane, ethanol, Freon 11, Freon 113, hexane, isobutylene, methylene chloride, toluene, and vinyl chloride. The VOC with the maximum detected concentration was Freon 113 at 3,400 parts per billion by volume (ppbv) in sample RISVCL-08C. The concentrations of constituents detected in this sampling event were generally within the ranges previously reported for samples collected from these soil vapor probes. However, the concentration of vinyl chloride in RISVCL-08C was slightly higher than previously measured concentrations.

Quality Assurance/Quality Control (QA/QC)

Helium and isobutane leak check compounds were not detected in the samples collected during this sampling event, indicating that the results were not biased by leakage of ambient air during sample collection.

The Data Validation Report for the analytical data is provided as Attachment B. The results of the data validation indicated that the data are useable for their intended purpose based on the information provided. Descriptions of data qualifications are provided within the data validation report. These data qualifications are listed in the soil vapor analytical results table (Table 1).

Comparison to the Ecological and Human Health Risk Assessment Concentrations

Maximum concentrations from soil vapor samples collected during this monitoring event were compared to the EPCs used in the Ecological and Human Health Risk Assessments documented in the RI (CSC, 2011). The maximum soil vapor concentrations did not exceed the EPCs used in the RI report for any compounds detected.

Summary

The findings of the spring 2016 soil vapor sampling event indicates that concentrations of detected VOCs were similar to previous sampling results. Maximum concentrations from soil vapor samples collected during this monitoring event did not exceed the EPCs documented in the RI.


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The potential for releases of contaminants to the north of the Site via soil vapor is minimal based on these and previous sampling results. The next annual sampling event will be scheduled for spring of 2017.

* * * * * *

Please do not hesitate to contact us if you have any questions regarding the spring 2016 soil vapor sampling event.

Sincerely,

Kevin Coffman, P.G. Robert Ettinger Senior Geologist Senior Principal

Attachments

Table 1: Soil Vapor Analytical Results

Figure 1: Soil Vapor Probe Location Map

Attachment : Data Validation Report

Table 1Soil Vapor Analytical Results in ppbv

Years 1 - 7 (Autumn 2009 - Spring 2016)

Year 1 Year 6 Year 7

RISVCL-03C10/6/2009

RISVCL-03C4/1/2010

RISVCL-03C10/5/2010*

RISVCL-03C4/5/2011*

RISVCL-03C10/4/11*

RISVCL-03C4/4/12*

RISVCL-03C10/16/12

RISVCL-03C4/9/13*

RISVCL-03C10/8/13

RISVCL-03C4/9/14*

RISVCL-03C5/5/15

RISVCL-03C5/5/16

1,1,1-Trichloroethane 170,000 <8.4 <1.8 NA NA NA NA <0.92 NA < 5.7 NA <9.8 < 3.41,1,2,2-Tetrachloroethane -- <8.4 <1.8 NA NA NA NA <0.92 NA < 5.7 NA <9.8 < 3.41,1,2-Trichloroethane 13 <8.4 <1.8 NA NA NA NA <0.92 NA < 5.7 NA <9.8 < 3.41,1-Dichloroethane 120,000 <8.4 <1.8 NA NA NA NA <0.92 NA < 5.7 NA <9.8 < 3.41,1-Dichloroethene 98,000 <8.4 <1.8 NA NA NA NA <0.92 NA < 5.7 NA <9.8 < 3.41,2,4-Trichlorobenzene -- <34 <8.8 NA NA NA NA <4 6 NA < 23 NA <39 < 131,2,4-Trimethylbenzene 28 <8.4 <1.8 NA NA NA NA 2.9 NA < 5.7 NA <9.8 < 3.41,2-Dibromoethane (EDB) -- <8.4 <1.8 NA NA NA NA <0.92 NA < 5.7 NA <9.8 < 3.41,2-Dichloroethane -- <8.4 <1.8 NA NA NA NA <0.92 NA < 5.7 NA <9.8 < 3.41,2-Dichloropropane 280 <8.4 <1.8 NA NA NA NA <0.92 NA < 5.7 NA <9.8 < 3.41,3,5-Trimethylbenzene 5.9 <8.4 <1.8 NA NA NA NA <0.92 NA < 5.7 NA <9.8 < 3.41,3-Butadiene 54 <8.4 <8.8 NA NA NA NA <4 6 NA 39 NA <9.8 181,3-Dichlorobenzene -- <8.4 <1.8 NA NA NA NA <0.92 NA < 5.7 NA <9.8 < 3.41,4-Dichlorobenzene 6.4 <8.4 <1.8 NA NA NA NA <0.92 NA < 5.7 NA <9.8 < 3.41,4-Dioxane -- <34 <8.8 NA NA NA NA <4 6 NA < 23 NA <39 < 132-Butanone (Methyl Ethyl Ketone) 4,200 <8.4 <8.8 NA NA NA NA 22 NA < 23 NA <39 < 132-Hexanone 270 <34 <8.8 NA NA NA NA <4 6 NA < 23 NA <39 < 132-Propanol 340 <34 <8.8 NA NA NA NA <4 6 NA < 23 NA <39 < 133-Chloropropene -- <34 <8.8 NA NA NA NA <4 6 NA < 23 NA <39 < 134-Ethyltoluene 9.4 <8.4 <8.8 NA NA NA NA <4 6 NA < 5.7 NA <9.8 < 3.44-Methyl-2-pentanone (MIBK) 18 <8.4 <8.8 NA NA NA NA <4 6 NA < 5.7 NA <9.8 < 3.4Acetone 3,000 <34 <8.8 NA NA NA NA 320 NA 100 NA 220 93alpha-Chlorotoluene -- <8.4 <1.8 NA NA NA NA <0.92 NA < 5.7 NA <9.8 < 3.4Benzene 31 <8.4 <1.8 NA NA NA NA 2.5 NA < 5.7 NA <9.8 4.4Bromodichloromethane -- <8.4 <8.8 NA NA NA NA <4 6 NA < 5.7 NA <9.8 < 3.4Bromoform -- <8.4 <8.8 NA NA NA NA <4 6 NA < 5.7 NA <9.8 < 3.4Bromomethane 2.6 <8.4 <1.8 NA NA NA NA <0.92 NA < 57 NA <98 < 34Butane -- 3000 500 NA NA NA NA 240 NA 1200 NA 2100 1700 JCarbon Disulfide 10 <8.4 <8.8 NA NA NA NA <4 6 NA < 23 NA <39 < 13Carbon Tetrachloride 35,000 <8.4 <1.8 NA NA NA NA <0.92 NA < 5.7 NA <9.8 < 3.4Chlorobenzene -- <8.4 <1.8 NA NA NA NA <0.92 NA < 5.7 NA <9.8 < 3.4Chloroethane 2 <8.4 <1.8 NA NA NA NA <4 6 NA < 23 NA <39 < 13Chloroform 11,000 <8.4 <1.8 NA NA NA NA <0.92 NA < 5.7 NA <9.8 < 3.4Chloromethane 26 <34 <1.8 NA NA NA NA 1.0 NA < 57 NA <98 < 34cis-1,2-Dichloroethene 34,000 <8.4 <1.8 NA NA NA NA <0.92 NA < 5.7 NA <9.8 < 3.4cis-1,3-Dichloropropene -- <8.4 <1.8 NA NA NA NA <0.92 NA < 5.7 NA <9.8 < 3.4Cyclohexane 100 <8.4 <8.8 NA NA NA NA <4 6 NA < 5.7 NA <9.8 < 3.4Dibromochloromethane -- <8.4 <8.8 NA NA NA NA <4 6 NA < 5.7 NA <9.8 < 3.4Ethanol 400 <34 <8.8 NA NA NA NA 27 NA < 23 NA <39 < 13Ethyl Benzene 31 <8.4 <1.8 NA NA NA NA <0.92 NA < 5.7 NA <9.8 < 3.4Freon 11 66,000 9.2 <1.8 NA NA NA NA <0.92 NA < 5.7 NA <9.8 < 3.4Freon 113 1,000,000 68 4.0 NA NA NA NA 2.5 NA < 5.7 NA 26 17Heptane 33 <8.4 <8.8 NA NA NA NA <4 6 NA < 5.7 NA <9.8 < 3.4Hexachlorobutadiene -- <34 <8.8 NA NA NA NA <4 6 NA < 23 NA <39 UJ < 13Hexane 570 <8.4 <8.8 NA NA NA NA <4 6 NA < 5.7 NA <9.8 6.1Isobutylene -- <34 <8.8 NA NA NA NA <4 6 NA 540 J NA 1400 J 1300 Jm,p-Xylene 120 <8.4 <1.8 NA NA NA NA 1.8 NA < 5.7 NA <9.8 < 3.4Methyl tert-butyl ether -- <8.4 <8.8 NA NA NA NA <4 6 NA < 5.7 NA <9.8 < 3.4Methylene Chloride 2,900 <8.4 <3.5 NA NA NA NA <1 8 NA < 57 NA <98 < 34o-Xylene 32 <8.4 <1.8 NA NA NA NA <0.92 NA < 5.7 NA <9.8 < 3.4Styrene 0.45 <8.4 <1.8 NA NA NA NA <0.92 NA < 5.7 NA <9.8 < 3.4Tetrachloroethene 55,000 <8.4 <1.8 NA NA NA NA <0.92 NA < 5.7 NA <9.8 < 3.4Tetrahydrofuran 740 <8.4 <8.8 NA NA NA NA <4 6 NA 6.6 NA <9.8 < 3.4Toluene 45 <8.4 <1.8 NA NA NA NA 1.8 NA < 5.7 NA <9.8 4.5trans-1,3-Dichloropropene -- <8.4 <1.8 NA NA NA NA <0.92 NA < 5.7 NA <9.8 < 3.4Trichloroethene 150,000 <8.4 <1.8 NA NA NA NA <0.92 NA < 5.7 NA <9.8 < 3.4Vinyl Acetate -- <34 <8.8 NA NA NA NA <4 6 NA < 23 NA <39 < 13Vinyl Chloride 5,200 <8.4 <1.8 NA NA NA NA <0.92 NA < 5.7 NA <9.8 < 3.4

Isobutane -- <0.0025 <0.0021 NA NA NA NA <0.0055 NA <0 0029 NA <0.0029 <0 0034Helium -- 0.0 0.08 NA NA NA NA 0 0 NA 0.0 NA 0 0 0.0

VOLAT LE ORGANIC COMPOUND Onsite Soil Vapor EPC

LEAK COMPOUNDS (Concentrations Reported in Volume Percent)

Year 5Year 2 Year 4Year 3RISVCL-03C

Page 1 of 4Soil Vapor Monitoring - 2016

Casmalia Site



RISVCL-05C10/6/2009

RISVCL-05C4/1/2010

RISVCL-05C-DUP

4/1/2010

RISVCL-05C10/5/2010

RISVCL-05C-DUP

10/5/2010

RISVCL-05C4/5/2011

RISVCL-05C-DUP

4/5/2011

RISVCL-05C10/4/11

RISVCL-05C-DUP

10/4/11

RISVCL-05C4/4/12

RISVCL-05C-DUP

4/4/121,1,1-Trichloroethane 170,000 <0.20 <0.19 <0.19 <0.24 <0.24 <0.16 <0.16 <0.20 <0.20 <0.37 <0 371,1,2,2-Tetrachloroethane -- <0.20 <0.19 <0.19 <0.24 <0.24 <0.16 <0.16 <0.20 <0.20 <0.37 <0 371,1,2-Trichloroethane 13 <0.20 <0.19 <0.19 <0.24 <0.24 <0.16 <0.16 <0.20 <0.20 <0.37 <0 371,1-Dichloroethane 120,000 <0.20 <0.19 <0.19 <0.24 <0.24 <0.16 <0.16 <0.20 <0.20 <0.37 <0 371,1-Dichloroethene 98,000 <0.20 <0.19 <0.19 0.24 J 0.34 J <0.16 <0.16 <0.20 <0.20 <0.37 <0 371,2,4-Trichlorobenzene -- <1.0 <0 96 <0.96 <1.2 <1.2 <0.80 <0.80 <1.0 <1.0 <1.8 <1.81,2,4-Trimethylbenzene 28 <0.20 <0.19 <0.19 <0.24 <0.24 0.43 J <0.16 UJ <0.20 <0.20 <0.37 <0 371,2-Dibromoethane (EDB) -- <0.20 <0.19 <0.19 <0.24 <0.24 <0.16 <0.16 <0.20 <0.20 <0.37 <0 371,2-Dichloroethane -- <0.20 <0.19 <0.19 <0.24 <0.24 <0.16 <0.16 <0.20 <0.20 <0.37 <0 371,2-Dichloropropane 280 <0.20 <0.19 <0.19 <0.24 <0.24 <0.16 <0.16 <1.0 <1.0 <0.37 <0 371,3,5-Trimethylbenzene 5.9 <0.20 <0.19 <0.19 <0.24 <0.24 <0.16 <0.16 <0.20 <0.20 <0.37 <0 371,3-Butadiene 54 <1.0 <0 96 <0.96 <1.2 <1.2 <0.80 <0.80 <1.0 <1.0 <1.8 <1.81,3-Dichlorobenzene -- <0.20 <0.19 <0.19 <0.24 <0.24 <0.16 UJ <0.16 UJ <0.20 <0.20 <0.37 <0 371,4-Dichlorobenzene 6.4 <0.20 <0.19 <0.19 <0.24 <0.24 <0.16 UJ <0.16 UJ <0.20 <0.20 <0.37 <0 371,4-Dioxane -- <1.0 <0 96 <0.96 <1.2 <1.2 <0.80 <0.80 <1.0 <1.0 <1.8 <1.82-Butanone (Methyl Ethyl Ketone) 4,200 1.3 2.0 1.7 <1.2 UJ 1.9 J 1.7 J <0.80 UJ <1.0 <1.0 <1.8 <1.82-Hexanone 270 <1.0 <0 96 <0.96 <1.2 <1.2 <0.80 <0.80 <1.0 <1.0 <1.8 <1.82-Propanol 340 <1.0 <0 96 <0.96 <1.2 <1.2 <0.80 <0.80 <1.0 <1.0 <1.8 <1.83-Chloropropene -- <1.0 <0 96 <0.96 <1.2 <1.2 <0 80 UJ <0.80 UJ <1.0 <1.0 <1.8 <1.84-Ethyltoluene 9.4 <1.0 <0 96 <0.96 <1.2 <1.2 <0.80 <0.80 <1.0 <1.0 <1.8 <1.84-Methyl-2-pentanone (MIBK) 18 <1.0 <0 96 <0.96 <1.2 <1.2 <0.80 <0.80 <1.0 <1.0 <1.8 <1.8Acetone 3,000 6.8 6.2 J 4.4 J 5.1 J 8.6 J 6.6 J 3.0 J 2.1 J 8.9 J 5.0 3.8alpha-Chlorotoluene -- <0.20 <0.19 <0.19 <0.24 <0.24 <0.16 UJ <0.16 UJ <0.20 <0.20 <0.37 <0 37Benzene 31 <0.20 <0.19 <0.19 <0.24 <0.24 0.17 J <0.16 UJ <0.20 <0.20 <0.37 <0 37Bromodichloromethane -- <1.0 <0 96 <0.96 <1.2 <1.2 <0.80 <0.80 <1.0 <1.0 <1.8 <1.8Bromoform -- <1.0 <0 96 <0.96 <1.2 <1.2 <0.80 <0.80 <1.0 <1.0 <1.8 <1.8Bromomethane 2.6 <0.20 <0.19 <0.19 <0.24 <0.24 <0.16 <0.16 0.24 0.24 <0.37 <0 37Butane -- 15 16 19 3.9 4.9 6.1 J <0.80 UJ 2.4 2.4 <1.8 <1.8Carbon Disulfide 10 1.0 <0 96 <0.96 <1.2 <1 2 <0.80 <0.80 2.1 J <0 20 UJ <1.8 <1.8Carbon Tetrachloride 35,000 <0.20 <0.19 <0.19 <0.24 <0.24 <0.16 <0.16 <0.20 <0.20 <0.37 <0 37Chlorobenzene -- <0.20 <0.19 <0.19 <0.24 <0.24 <0.16 <0.16 <0.20 <0.20 <0.37 <0 37Chloroethane 2 <0.20 <0.19 <0.19 <0.24 <0.24 <0.80 <0.80 <1.0 <1.0 <1.8 <1.8Chloroform 11,000 <0.20 <0.19 <0.19 <0.24 <0.24 <0.16 <0.16 <0.20 <0.20 <0.37 <0 37Chloromethane 26 <0.20 <0.19 <0.19 <0.24 <0.24 <0.16 UJ 0.44 J <0.20 <0.20 <0.37 <0 37cis-1,2-Dichloroethene 34,000 <0.20 <0.19 <0.19 <0.24 <0.24 <0.16 <0.16 <0.20 <0.20 <0.37 <0 37cis-1,3-Dichloropropene -- <0.20 <0.19 <0.19 <0.24 <0.24 <0.16 UJ <0.16 UJ <0.20 <0.20 <0.37 <0 37Cyclohexane 100 <1.0 <0 96 <0.96 <1.2 <1 2 <0.80 <0.80 <1.0 <1.0 <1.8 <1.8Dibromochloromethane -- <1.0 <0 96 <0.96 <1.2 <1 2 <0.80 <0.80 <1.0 <1.0 <1.8 <1.8Ethanol 400 3.7 5.3 6.1 5.2 4.8 6.7 J 3.3 J 1.8 J 10 J 4.1 J 6.6 JEthyl Benzene 31 <0.20 <0.19 <0.19 <0.24 <0.24 <0.16 <0.16 <0.20 <0.20 <0.37 <0 37Freon 11 66,000 0.26 0.23 0.22 0.27 0.28 0.17 0.2 0.24 0.25 <0.37 <0 37Freon 113 1,000,000 66 59 59 83 75 50 J <0.16 UJ 70 71 78 82Heptane 33 <1.0 <0 96 <0.96 <1.2 <1 2 <0.80 <0.80 <1.0 <1.0 <1.8 <1.8Hexachlorobutadiene -- <1.0 <0 96 <0.96 <1.2 <1 2 <0.80 <0.80 <1.0 <1.0 <1.8 <1.8Hexane 570 <1.0 <0 96 <0.96 <1.2 <1 2 <0.80 <0.80 <1.0 <1.0 <1.8 <1.8Isobutylene -- <1.0 <0 96 <0.96 <1.2 <1 2 <0.80 <0.80 <1.0 <1.0 <1.8 <1.8m,p-Xylene 120 <0.20 <0.19 <0.19 <0.24 <0.24 0.33 J <0.16 UJ <0.20 <0.20 <0.37 <0 37Methyl tert-butyl ether -- <1.0 <0 96 <0.96 <1.2 <1 2 <0.80 <0.80 <1.0 <1.0 <1.8 <1.8Methylene Chloride 2,900 1.8 <0 38 <0.38 <0.48 <0.48 <0.32 <0.32 <0.40 <0.40 <0.73 <0.73o-Xylene 32 <0.20 <0.19 <0.19 <0.24 <0.24 0.16 J <0.16 UJ <0.20 <0.20 <0.37 <0 37Styrene 0.45 <0.20 <0.19 <0.19 <0.24 <0.24 <0.16 UJ <0.16 UJ <0.20 <0.20 <0.37 <0 37Tetrachloroethene 55,000 0.51 0.36 0.38 0.32 0.29 0.27 J <0.16 UJ 0.21 0.22 <0.37 <0 37Tetrahydrofuran 740 <1.0 <0 96 <0.96 <1.2 <1 2 <0.80 <0.80 <1.0 <1.0 <1.8 <1.8Toluene 45 2.6 <0.19 <0.19 <0.24 <0.24 0.43 J 0.29 J <0.20 <0.20 <0.37 <0 37trans-1,3-Dichloropropene -- <0.20 <0.19 <0.19 <0.24 <0.24 <0.16 <0.16 <0.20 <0.20 <0.37 <0 37Trichloroethene 150,000 <0.20 <0.19 <0.19 <0.24 <0.24 <0.16 <0.16 <1.0 <1.0 <0.37 <0 37Vinyl Acetate -- <1.0 <0 96 <0.96 <1.2 <1 2 <0.80 <0.80 <1.0 <1.0 <1.8 <1.8Vinyl Chloride 5,200 <0.20 <0.19 <0.19 <0.24 <0.24 <0.16 <0.16 <0.20 <0.20 <0.37 <0 37

Isobutane -- <0 0020 <0.0019 <0.0019 <0.0019 <0.0019 <0.0016 <0.0016 ND* ND* <0.0018 <0.0018Helium -- 0.0

VOLATILE ORGANIC COMPOUND Onsite Soil Vapor EPC

RISVCL-05CYear 3

0.0

Year 1

0.0

Year 2

0.0


0.0 0.0


Casmalia Site



RISVCL-05C10/16/12

RISVCL-05C-DUP

10/16/12

RISVCL-05C4/9/13

RISVCL-05C-DUP

4/9/13

RISVCL-05C10/8/13

RISVCL-05C-DUP

10/8/13

RISVCL-05C4/9/14

RISVCL-05C-DUP

4/9/14

RISVCL-05C5/5/15

RISVCL-05C-DUP

5/5/15

RISVCL-05C5/5/16

RISVCL-05C-DUP

5/5/161,1,1-Trichloroethane 170,000 <0.42 <0 30 <0.33 <0.27 < 0.35 < 0.34 < 0.44 < 0.43 < 0.24 < 0.24 < 0.26 < 0.241,1,2,2-Tetrachloroethane -- <0.42 <0 30 <0.33 <0.27 < 0.35 < 0.34 < 0.44 < 0.43 < 0.24 < 0.24 < 0.26 < 0.241,1,2-Trichloroethane 13 <0.42 <0 30 <0.33 <0.27 < 0.35 < 0.34 < 0.44 < 0.43 < 0.24 < 0.24 < 0.26 < 0.241,1-Dichloroethane 120,000 <0.42 <0 30 <0.33 <0.27 < 0.35 < 0.34 < 0.44 < 0.43 < 0.24 < 0.24 < 0.26 < 0.241,1-Dichloroethene 98,000 <0.42 <0 30 <0.33 <0.27 < 0.35 < 0.34 < 0.44 < 0.43 < 0.24 < 0.24 < 0.26 < 0.241,2,4-Trichlorobenzene -- <2.1 <1.5 <1.6 <1.4 < 1.7 < 1.7 < 2.2 < 2.2 < 1 2 < 1.2 < 1 3 < 1.21,2,4-Trimethylbenzene 28 <0.42 <0 30 <0.33 <0.27 < 0.35 < 0.34 < 0.44 < 0.43 < 0.24 < 0.24 < 0.26 < 0.241,2-Dibromoethane (EDB) -- <0.42 <0 30 <0.33 <0.27 < 0.35 < 0.34 < 0.44 < 0.43 < 0.24 < 0.24 < 0.26 < 0.241,2-Dichloroethane -- <0.42 <0 30 0.41 J 0.77 J < 0.35 < 0.34 < 0.44 < 0.43 < 0.24 < 0.24 < 0.26 < 0.241,2-Dichloropropane 280 <0.42 <0 30 <0.33 <0.27 < 0.35 < 0.34 < 0.44 < 0.43 < 0.24 < 0.24 < 0.26 < 0.241,3,5-Trimethylbenzene 5.9 <0.42 <0 30 <0.33 <0.27 < 0.35 < 0.34 < 0.44 < 0.43 < 0.24 < 0.24 < 0.26 < 0.241,3-Butadiene 54 <2.1 <1.5 <1.6 <1.4 < 1.7 < 1.7 < 2.2 < 2.2 < 1 2 < 1.2 < 1 3 < 1.21,3-Dichlorobenzene -- <0.42 <0 30 <0.33 <0.27 < 0.35 < 0.34 < 0.44 < 0.43 < 0.24 < 0.24 < 0.26 < 0.241,4-Dichlorobenzene 6.4 <0.42 <0 30 <0.33 <0.27 < 0.35 < 0.34 < 0.44 < 0.43 < 0.24 < 0.24 < 0.26 < 0.241,4-Dioxane -- <2.1 <1.5 <1.6 <1.4 < 1.7 < 1.7 < 2.2 < 2.2 < 1 2 < 1.2 < 1 3 < 1.22-Butanone (Methyl Ethyl Ketone) 4,200 <2.1 <1.5 1.8 J 2.5 J < 1.7 < 1.7 < 2.2 < 2.2 1.4 J < 1.2 UJ < 1 3 < 1.22-Hexanone 270 <2.1 <1.5 <1.6 <1.4 < 1.7 < 1.7 < 2.2 < 2.2 < 1 2 < 1.2 < 1.3 < 1.22-Propanol 340 <2.1 <1.5 13 15 9.4 9.0 < 2.2 < 2.2 < 1 2 < 1.2 2.8 J 9.2 J3-Chloropropene -- <2.1 <1.5 <1.6 <1.4 < 1.7 < 1.7 < 2.2 < 2.2 < 1 2 < 1.2 < 1 3 < 1.24-Ethyltoluene 9.4 <2.1 <1.5 <1.6 <1.4 < 1.7 < 1.7 < 2.2 < 2.2 < 1 2 < 1.2 < 1 3 < 1.24-Methyl-2-pentanone (MIBK) 18 <2.1 <1.5 <1.6 UJ 3.5 J < 1.7 < 1.7 < 2.2 < 2.2 < 1 2 < 1.2 < 1 3 < 1.2Acetone 3,000 4.0 J 6.9 J 13 J 19 J 6.0 J 9.2 J 2.7 3.5 5.0 5.1 7.9 7.4alpha-Chlorotoluene -- <0.42 <0 30 <0.33 <0.27 < 0.35 < 0.34 < 0.44 < 0.43 < 0.24 < 0.24 < 0.26 < 0.24Benzene 31 <0.42 <0 30 0.47 J 0.65 J < 0.35 < 0.34 < 0.44 < 0.43 < 0.24 < 0.24 < 0.26 < 0.24Bromodichloromethane -- <2.1 <1.5 <1.6 <1.4 < 1.7 < 1.7 < 2.2 < 2.2 < 1.2 < 1.2 < 1 3 < 1.2Bromoform -- <2.1 <1.5 <1.6 <1.4 < 1.7 < 1.7 < 2.2 < 2.2 < 1.2 < 1.2 < 1 3 < 1.2Bromomethane 2 6 <0.42 <0 30 <1.6 <1.4 < 1.7 < 1.7 < 2.2 < 2.2 < 1.2 < 1.2 < 1 3 < 1.2Butane -- <2.1 <1.5 2.7 2.4 < 1.7 < 1.7 < 2.2 < 2.2 < 1.2 UJ 1.6 J < 1 3 < 1.2Carbon Disulfide 10 <2.1 <1.5 <1.6 UJ 2.1 J < 1.7 < 1.7 < 2.2 < 2.2 < 1.2 < 1.2 < 1 3 < 1.2Carbon Tetrachloride 35,000 <0.42 <0 30 <0.33 <0.27 < 0.35 < 0.34 < 0.44 < 0.43 < 0.24 < 0.24 < 0.26 < 0.24Chlorobenzene -- <0.42 <0 30 <0.33 <0.27 < 0.35 < 0.34 < 0.44 < 0.43 < 0.24 < 0.24 < 0.26 < 0.24Chloroethane 2 <2.1 <1.5 <1.6 <1.4 < 1.7 < 1.7 < 2.2 < 2.2 < 1.2 < 1.2 < 1 3 < 1.2Chloroform 11,000 <0.42 <0 30 <0.33 <0.27 < 0.35 < 0.34 < 0.44 < 0.43 < 0.24 < 0.24 < 0.26 < 0.24Chloromethane 26 <0.42 <0 30 <0.33 <0.27 < 1.7 < 1.7 < 2.2 < 2.2 < 1.2 < 1.2 < 1 3 < 1.2cis-1,2-Dichloroethene 34,000 <0.42 <0 30 <0.33 <0.27 < 0.35 < 0.34 < 0.44 < 0.43 < 0.24 < 0.24 < 0.26 < 0.24cis-1,3-Dichloropropene -- <0.42 <0 30 <0.33 <0.27 < 0.35 < 0.34 < 0.44 < 0.43 < 0.24 < 0.24 < 0.26 < 0.24Cyclohexane 100 <2.1 <1.5 <1.6 <1.4 < 1.7 < 1.7 < 2.2 < 2.2 < 1.2 < 1.2 < 1 3 < 1.2Dibromochloromethane -- <2.1 <1.5 <1.6 <1.4 < 1.7 < 1.7 < 2.2 < 2.2 < 1.2 < 1.2 < 1 3 < 1.2Ethanol 400 4.9 J 7.2 J 5.2 J 8.8 J 6.1 J 3.8 J 4.8 5.5 10 11 6.1 J 28 JEthyl Benzene 31 <0.42 <0 30 <0 33 UJ 0.52 J < 0.35 < 0.34 < 0.44 < 0.43 < 0.24 < 0.24 < 0.26 < 0.24Freon 11 66,000 <0.42 UJ 0.31 J <0.33 <0.27 < 0.35 J 0.35 J < 0.44 < 0.43 0.27 J 0.24 J < 0.26 UJ 0.26 JFreon 113 1,000,000 75 85 72 77 95 130 79 85 96 89 3.1 2.6Heptane 33 <2.1 <1.5 <1.6 <1.4 < 1.7 < 1.7 < 2.2 < 2.2 < 1 2 < 1.2 < 1 3 < 1.2Hexachlorobutadiene -- <2.1 <1.5 <1.6 <1.4 < 1.7 < 1.7 < 2.2 < 2.2 < 1 2 < 1.2 < 1 3 < 1.2Hexane 570 <2.1 <1.5 <1.6 <1.4 < 1.7 < 1.7 < 2.2 < 2.2 < 1 2 < 1.2 < 1 3 < 1.2Isobutylene -- <2.1 <1.5 <1.6 <1.4 < 1.7 < 1.7 < 2.2 < 2.2 < 1 2 < 1.2 < 1 3 < 1.2m,p-Xylene 120 <0.42 <0 30 <0.33 UJ 0.40 J < 0.35 < 0.34 < 0.44 < 0.43 < 0.24 < 0.24 < 0.26 < 0.24Methyl tert-butyl ether -- <2.1 <1.5 <1.6 <1.4 < 1.7 < 1.7 < 2.2 < 2.2 < 1 2 < 1.2 < 1 3 < 1.2Methylene Chloride 2,900 <0.85 <0 61 0.77 0.97 < 0.69 < 0.67 < 0.88 < 0.86 < 0.48 < 0.48 < 0.52 UJ 0.58 Jo-Xylene 32 <0.42 <0 30 <0.33 <0 27 < 0.35 < 0.34 < 0.44 < 0.43 < 0.24 < 0.24 < 0.26 < 0.24Styrene 0.45 <0.42 <0 30 <0.33 <0 27 < 0.35 < 0.34 < 0.44 < 0.43 < 0.24 < 0.24 < 0.26 < 0.24Tetrachloroethene 55,000 <0.42 <0 30 <0.33 <0 27 < 0.35 < 0.34 < 0.44 < 0.43 < 0.24 < 0.24 < 0.26 < 0.24Tetrahydrofuran 740 <2.1 <1.5 <1.6 <1.4 < 1.7 < 1.7 < 2.2 < 2.2 < 1 2 < 1.2 < 1 3 < 1.2Toluene 45 <0.42 <0 30 1.2 J 3.4 J < 0.35 < 0.34 < 0.44 < 0.43 < 0.24 < 0.24 < 0.26 UJ 2.4 Jtrans-1,3-Dichloropropene -- <0.42 <0 30 <0.33 <0 27 < 0.35 < 0.34 < 0.44 < 0.43 < 0.24 < 0.24 < 0.26 < 0.24Trichloroethene 150,000 <0.42 <0 30 <0.33 <0 27 < 0.35 < 0.34 < 0.44 < 0.43 < 0.24 < 0.24 < 0.26 < 0.24Vinyl Acetate -- <2.1 <1.5 <1.6 <1.4 < 1.7 < 1.7 < 2.2 < 2.2 < 1 2 < 1.2 < 1 3 < 1.2Vinyl Chloride 5,200 <0.42 <0 30 <0.33 <0 27 < 0.35 < 0.34 < 0.44 < 0.43 < 0.24 < 0.24 < 0.26 < 0.24

Isobutane -- <0.0021 <0.0021 <0 0020 <0.0020 <0 0017 <0.0017 < 0.0022 < 0.0022 <0.0024 <0 0024 <0.0026 <0 0024Helium --

VOLATILE ORGANIC COMPOUND Year 6 Year 7

RISVCL-05C (continued)

0.0


VOLATILE ORGANIC COMPOUND Onsite Soil Vapor EPC

0 0

Year 4

0.0 0 00.0

Year 5Onsite Soil Vapor

EPC

0.0


Casmalia Site



Year 6 Year 7

RISVCL-08C10/6/2009

RISVCL-08C-DUP

10/6/2009

RISVCL-08C4/1/2010

RISVCL-08C10/5/2010

RISVCL-08C4/5/2011

RISVCL-08C10/4/11*

RISVCL-08C4/4/12*

RISVCL-08C10/16/12

RISVCL-08C4/9/13

RISVCL-08C10/8/13

RISVCL-08C4/9/14

RISVCL-08C5/5/15

RISVCL-08C5/5/16

1,1,1-Trichloroethane 170,000 <5.6 <6.2 <1.9 <13 <2.4 NA NA <16 <1.1 < 3.5 < 31 < 21 < 131,1,2,2-Tetrachloroethane -- <5.6 <6.2 <1.9 <13 <2.4 NA NA <16 <1.1 < 3.5 < 31 < 21 < 131,1,2-Trichloroethane 13 <5.6 <6.2 <1.9 <13 <2.4 NA NA <16 <1.1 < 3.5 < 31 < 21 < 131,1-Dichloroethane 120,000 <5.6 <6.2 <1.9 <13 <2.4 NA NA <16 <1.1 < 3.5 < 31 < 21 < 131,1-Dichloroethene 98,000 <5.6 <6.2 7.0 20 <2.4 NA NA <16 <1.1 < 3.5 < 31 < 21 < 131,2,4-Trichlorobenzene -- <22 <25 <9.6 <52 <12 NA NA <160 <5.6 < 18 < 120 J < 83 < 531,2,4-Trimethylbenzene 28 6.3 8.1 <1.9 <13 <2.4 NA NA <16 <1.1 < 3.5 < 31 < 21 < 131,2-Dibromoethane (EDB) -- <5.6 <6.2 <1.9 <13 <2.4 NA NA <16 <1.1 < 3.5 < 31 < 21 < 131,2-Dichloroethane -- <5.6 <6.2 <1.9 <13 <2.4 NA NA <16 <1.1 < 3.5 < 31 < 21 < 131,2-Dichloropropane 280 <5.6 <6.2 <1.9 <13 <2.4 NA NA <16 <1.1 < 3.5 < 31 < 21 < 131,3,5-Trimethylbenzene 5 9 16 19 <1.9 <13 <2.4 NA NA <16 <1.1 < 3.5 < 31 < 21 < 131,3-Butadiene 54 <5.6 <6.2 <9.6 <13 <12 NA NA <16 23 < 18 < 31 < 21 < 131,3-Dichlorobenzene -- <5.6 <6.2 <1.9 <13 <2.4 UJ NA NA <16 <1.1 < 3.5 < 31 < 21 < 131,4-Dichlorobenzene 6.4 <5.6 <6.2 <1.9 <13 <2.4 UJ NA NA <16 <1.1 < 3.5 < 31 < 21 < 131,4-Dioxane -- <22 <25 <9.6 <52 <12 NA NA <64 <5.6 < 18 < 120 < 83 < 532-Butanone (Methyl Ethyl Ketone) 4,200 <5.6 <6.2 16 <13 <12 NA NA <64 18 < 18 < 120 < 83 < 532-Hexanone 270 <22 <25 <9.6 <52 <12 NA NA <64 <5.6 < 18 < 120 < 83 < 532-Propanol 340 <22 <25 <9.6 <52 <12 NA NA <64 150 < 18 < 120 < 83 < 533-Chloropropene -- <22 <25 <9.6 <13 <12 UJ NA NA <64 <5.6 < 18 < 120 < 83 < 534-Ethyltoluene 9.4 9.0 11 <9.6 <13 <12 NA NA <16 <5.6 < 18 < 31 < 21 < 134-Methyl-2-pentanone (MIBK) 18 <5.6 <6.2 <9.6 <13 <12 NA NA <16 <5.6 < 18 < 31 < 21 < 13Acetone 3,000 <22 <25 35 54 14 NA NA 410 170 32 310 < 210 < 130alpha-Chlorotoluene -- <5.6 <6.2 <1.9 <13 <2.4 UJ NA NA <16 <1.1 < 3.5 < 31 < 21 < 13Benzene 31 <5.6 <6.2 <1.9 <13 <2.4 NA NA <16 16 8.0 < 31 < 21 < 13Bromodichloromethane -- <5.6 <6.2 <9.6 <13 <12 NA NA <16 <5.6 < 18 < 31 < 21 < 13Bromoform -- <5.6 <6.2 <9.6 <13 <12 NA NA <16 <5.6 < 18 < 31 < 21 < 13Bromomethane 2.6 <5.6 <6.2 <1.9 <13 <2.4 NA NA <160 <5.6 < 18 < 310 < 210 < 130Butane -- 480 570 530 300 440 NA NA 3700 1400 580 610 120 110 JCarbon Disulfide 10 20 25 100 <13 <12 NA NA <64 <5.6 < 18 < 120 < 83 < 53Carbon Tetrachloride 35,000 <5.6 <6.2 <1.9 <13 <2.4 NA NA <16 <1.1 < 3.5 < 31 < 21 < 13Chlorobenzene -- <5.6 <6.2 <1.9 <13 <2.4 NA NA <16 <1.1 < 3.5 < 31 < 21 < 13Chloroethane 2 <5.6 <6.2 <1.9 <13 <12 NA NA <64 <5.6 < 18 < 120 < 83 < 53Chloroform 11,000 <5.6 <6.2 <1.9 <13 <2.4 NA NA <16 <1.1 < 3.5 < 31 < 21 < 13Chloromethane 26 <22 <25 <1.9 <52 <2.4 UJ NA NA <160 5.3 < 18 < 310 < 210 < 130cis-1,2-Dichloroethene 34,000 <5.6 <6.2 <1.9 <13 <2.4 NA NA <16 <1.1 < 3.5 < 31 < 21 < 13cis-1,3-Dichloropropene -- <5.6 <6.2 <1.9 <13 <2.4 UJ NA NA <16 <1.1 < 3.5 < 31 < 21 < 13Cyclohexane 100 <5.6 <6.2 <9.6 <13 <12 NA NA <16 <5.6 < 18 < 31 < 21 < 13Dibromochloromethane -- <5.6 <6.2 <9.6 <13 <12 NA NA <16 <5.6 < 18 < 31 < 21 < 13Ethanol 400 <22 <25 34 <52 <12 NA NA 97 94 < 18 < 120 310 71Ethyl Benzene 31 7.1 8.2 <1.9 <13 <2.4 NA NA <16 <1.1 < 3.5 < 31 < 21 < 13Freon 11 66,000 170 200 270 650 54 NA NA 45 26 130 2200 1200 1500Freon 113 1,000,000 1800 2200 3400 7100 570 NA NA 180 91 680 8300 3400 3400Heptane 33 <5.6 <6.2 <9.6 <13 <12 NA NA <16 <5.6 < 18 < 31 < 21 < 13Hexachlorobutadiene -- <22 <25 <9.6 <52 <12 NA NA <64 <5.6 < 18 < 120 J < 83 UJ < 53Hexane 570 <5.6 <6.2 <9.6 <13 <12 NA NA <16 <5.6 < 18 < 31 < 21 < 13Isobutylene -- <22 <25 <9.6 <13 <12 NA NA <3.2 430 J 250 J 500 33 63 Jm,p-Xylene 120 8.6 11 <1.9 <13 <2.4 NA NA <16 3.0 < 3.5 < 31 < 21 < 13Methyl tert-butyl ether -- <5.6 <6.2 <9.6 <13 <12 NA NA <16 <5.6 < 18 < 31 < 21 < 13Methylene Chloride 2,900 <5.6 <6.2 <3.8 <13 <4.8 NA NA <160 <2.2 < 7.0 < 310 < 210 < 130o-Xylene 32 24 30 <1.9 <13 <2.4 NA NA <16 1.2 < 3.5 < 31 < 21 < 13Styrene 0.45 <5.6 <6.2 <1.9 <13 <2.4 UJ NA NA <16 <1.1 < 3.5 < 31 < 21 < 13Tetrachloroethene 55,000 <5.6 <6.2 <1.9 <13 <2.4 NA NA <16 8.8 13 < 31 < 21 < 13Tetrahydrofuran 740 <5.6 <6.2 <9.6 <13 <12 NA NA <16 <5.6 < 18 < 31 < 21 < 13Toluene 45 44 50 4.4 <13 <2.4 NA NA <16 7.8 6.0 < 31 < 21 < 13trans-1,3-Dichloropropene -- <5.6 <6.2 <1.9 <13 <2.4 NA NA <16 <1.1 < 3.5 < 31 < 21 < 13Trichloroethene 150,000 <5.6 <6.2 <1.9 <13 <2.4 NA NA <16 <1.1 < 3.5 < 31 < 21 < 13Vinyl Acetate -- <22 <25 <9.6 <52 <12 NA NA <64 <5.6 < 18 < 120 < 83 < 53Vinyl Chloride 5,200 <5.6 <6.2 <1.9 <13 <2.4 NA NA <16 <1.1 < 3.5 < 31 28 73

Isobutane -- <0 0020 <0.0019 <0 0019 <0.0026 <0.0034 NA NA <0 0064 <0.0056 <0.0056 <0.0031 <0.0025 <0 0027Helium -- 0.03 0.0 0 0 NA NA 0.0 0.0 0 0 0.0 0.0 0.0Notes:Volatile Organic Compounds

DUP: Duplicate

NA: Not Analyzed

RISVCL-08C


Year 5Year 3Year 1

0.0

Year 4Year 2VOLATILE ORGANIC COMPOUND Onsite Soil Vapor

EPC

*: Not sampled due to water in probe tubing.

--: Chemical not detected in RI sampling.

J: Flagged as estimated based on comparison of primary and duplicate results greater than 30% relative percent difference, biased high due to co-elution, or the result exceeded the instrument calibration range.

ND*: Not Detected as Tentatively Identified Compound

Leak Compounds: Isobutane analyzed by ASTM D-1945. Results displayed in %. Helium tracer gas monitored in the field.EPC: Exposure Point Concentration used for Baseline Human Health and Ecological Risk Assessments

UJ: Flagged as estimated less than the reporting limt.


Casmalia Site

FIGURE

Attachment A

Laboratory Analytical Reports

Attachment B

Data Validation Report

Data Validation Casmalia Landfill 23 May 2016 Page 2

Casmalia AirToxics 1605135A_B.docx Final Review: JK Caprio 05/27/16

The following samples were analyzed and reported in the laboratory reports:

Laboratory Sample ID Client Sample ID 1605135A-02A RISVCL-03C-050516 1605135B-02A RISVCL-03C-050516 1605135A-03A RISVCL-05C-050516 1605135B-03A RISVCL-05C-050516 1605135A-04A RISVCL-05C-050516-DUP 1605135B-04A RISVCL-05C-050516-DUP 1605135A-05A RISVCL-08C-050516 1605135B-05A RISVCL-08C-050516

A trip blank, QCTB-01-050516, was submitted with the samples, but was received with low vacuum, <25” mercury. The client was notified and cancelled the trip blank analysis.

The chain of custody (COC) lists TO-15 low level analyses for the samples. The narrative indicated that samples RISVCL-03C-050516 and RISVCL-08C-050516 were diluted and analyzed using full scan TO-15 due to the concentrations of target and/or non-target compounds in the samples.

1.0 VOLATILE ORGANIC COMPOUNDS

The soil vapor samples were analyzed for VOCs by EPA TO-15.

The areas of review are listed below. A leading check mark () indicates an area of review in which all data were acceptable. A preceding crossed circle (⊗) signifies areas where issues were raised during the course of the validation review and should be considered to determine any impact on data quality and usability.

⊗ Overall Assessment Holding Time Method Blank System Monitoring Compounds (Surrogates) Laboratory Control Sample Trip Blank ⊗ Field Duplicate Sensitivity Electronic Data Deliverable Review



1.1 Overall Assessment

The VOC data reported in this package are considered to be usable for meeting project objectives. The results are considered to be valid; the analytical completeness, defined as the ratio of the number of valid analytical results (valid analytical results include values qualified as estimated) to the total number of analytical results requested on samples submitted for analysis, for the project is 100%.

The concentrations of butane and isobutylene in sample RISVCL-03C-050516 were flagged with ‘E’, indicating that the concentrations exceeded the instrument's calibration range. Therefore, based on professional and technical judgment, the butane and isobutylene concentrations in sample RISVCL-03C-050516 were J qualified as estimated.

The report narrative indicated that the concentrations of butane and isobutylene in samples RISVCL-03C-050516 and RISVCL-08C-050516 may be biased high due to co-elution; the results were reported as estimated. Therefore, based on professional and technical judgment, the butane and isobutylene concentrations in samples RISVCL-03C-050516 and RISVCL-08C-050516 were J qualified as estimated.

The report contained the continuing calibration verification (CCV) results. The recoveries were within the method specified acceptance criteria, with the following exceptions. The recoveries of dibromochloromethane and bromoform were high and outside the method specified acceptance criteria in the CCV analyzed on 5/16/16. Since dibromochloromethane and bromoform were not detected in the associated samples, no qualifications were applied to the dibromochloromethane and bromoform data.

Sample Compound Laboratory Concentration (ppbv)

Laboratory Flag

Validation Concentration (ppbv)

Validation Qualifier*

Reason Code**

RISVCL-03C-050516

Butane 1700 E, J 1700 J 9

RISVCL-03C-050516

Isobutylene 1300 E, J 1300 J 9

RISVCL-08C-050516

Butane 110 J 110 J 13

RISVCL-08C-050516

Isobutylene 63 J 63 J 13

ppbv – parts per billion by volume J-estimated value E-result exceeded the calibration range * Validation qualifiers are defined in Attachment 1 at the end of this report **Reason codes are defined in Attachment 2 at the end of this report



1.2 Holding Time

The samples were analyzed within the 30-day technical holding time from the dates of collection.

1.3 Method Blank

Method blanks were analyzed at the proper frequency for the number and types of samples analyzed (one per batch of 20 samples). Two method blanks were reported with the data set. There were no detections of VOCs in the method blanks at or above the reporting limits (RLs).

1.4 System Monitoring Compounds (Surrogates)

The surrogates used are appropriate to the method, 1,2-dichloroethane-d4, 4-bromofluorobenzene, and toluene-d8. The surrogate recoveries were within the laboratory specified acceptance criteria.

1.5 Laboratory Control Sample (LCS)

LCSs were analyzed at the proper frequency for the number and types of samples analyzed (one per batch of 20 samples). Two LCS/LCS duplicate (LCSD) pairs were reported. The recoveries were within the method specified acceptance criteria, with the following exceptions.

The recoveries of dibromochloromethane and bromoform were high and outside the method specified acceptance criteria in the LCS/LCSD pair analyzed on 5/16/16. Since dibromochloromethane and bromoform were not detected in the associated samples, no qualifications were applied to the data.

Isobutylene was not included in the LCS/LCSD pairs; however, isobutylene was in the CCVs associated with the samples and the CCV recoveries were acceptable. Therefore, based on professional and technical judgment, no qualifications were applied to the data.

It was noted that the relative percent difference (RPD) results for the LCS/LCSD pairs were not reported by the laboratory. Based on professional and technical judgment, no qualifications were applied to the data since the LCS/LCSD recoveries were within the method specified acceptance criteria.

1.6 Trip Blank

As noted above, a trip blank accompanied the sample shipment, but was not analyzed due to the canister pressure upon laboratory receipt.



1.7 Field Duplicate

One field duplicate sample, RISVCL-05C-050516-DUP, was collected with the sample set. Acceptable precision (RPD <30%) was demonstrated between the field duplicate and the original sample, RISVCL-05C-050516, with the following exceptions.

The RPDs for 2-propanol and ethanol were >30%. Therefore, based on professional and technical judgment, the concentrations of 2-propanol and ethanol in the field duplicate pair were J qualified as estimated.

Toluene and methylene chloride were detected in the field duplicate and not detected in the original sample, resulting in non-calculable RPDs between the results. Therefore, based on professional and technical judgment, the concentrations of toluene and methylene chloride were J qualified as estimated and the nondetect results were UJ qualified as estimated less than the RLs in the field duplicate pair.

Freon 11 was detected in the field duplicate and not detected in the original sample, resulting in a non-calculable RPD between the results. However, since the concentration of Freon 11 in the field duplicate was less than the original sample RL, no qualifications were applied to the data.


Laboratory Flag

RPD Validation Concentration (ppbv)

Validation Qualifier

Reason Code

RISVCL-05C-050516

2-Propanol 2.8 NA 109 2.8 J 7

RISVCL-05C-050516-DUP

2-Propanol 9.2 NA 9.2 J 7

RISVCL-05C-050516

Acetone 7.9 NA 6 NA NA NA


Acetone 7.4 NA NA NA NA

RISVCL-05C-050516

Ethanol 6.1 NA 125 6.1 J 7


Ethanol 28 NA 28 J 7

RISVCL-05C-050516

Freon 11 0.26 U NC 0.26 UJ 7


Freon 11 0.26 NA 0.26 J 7

RISVCL-05C-050516

Freon 113 3.1 NA 18 NA NA NA




Laboratory Flag

RPD Validation Concentration (ppbv)

Validation Qualifier

Reason Code


Freon 113 2.6 NA NA NA NA

RISVCL-05C-050516

Methylene Chloride

0.52 U NC 0.52 UJ 7


Methylene Chloride

0.58 NA 0.58 J 7

RISVCL-05C-050516

Toluene 0.26 U NC 0.26 UJ 7


Toluene 2.4 NA 2.4 J 7

RISVCL-05C-050516

The other VOCs

ND NA 0 NA NA NA


The other VOCs

ND NA NA NA NA

ppbv-parts per billion by volume U-not detected at the stated RL NC-not calculable ND-not detected at the RL NA-not applicable 1.8 Sensitivity

The samples were reported to the RLs. Elevated non-detect results were reported due to sample dilutions. 1.9 Electronic Data Deliverable (EDD) Review

Results and sample IDs in the EDD were reviewed against the information provided by the associated level II report at a minimum of 20% as part of the data validation process. No discrepancies were identified between the level II report and the EDD.

2.0 ISOBUTANE

The soil vapor samples were analyzed for isobutane by modified ASTM method D-1945.

The areas of review are listed below. A leading check mark () indicates an area of review in which all data were acceptable. A preceding crossed circle (⊗) signifies areas where issues were raised during the course of the validation review and should be considered to determine any impact on data quality and usability.



Overall Assessment Holding Time Method Blank Laboratory Control Sample Field Duplicate Sensitivity Electronic Data Deliverable Review

2.1 Overall Assessment

The isobutane data reported in this package are considered to be usable for meeting project objectives. The results are considered to be valid; the analytical completeness, defined as the ratio of the number of valid analytical results (valid analytical results include values qualified as estimated) to the total number of analytical results requested on samples submitted for analysis, for the project is 100%.

2.2 Holding Times

The samples were analyzed within the 30-day technical holding time from the dates of collection.

2.3 Method Blank

Method blanks were analyzed at the proper frequency for the number and types of samples analyzed (one per batch of 20 samples). One method blank was reported. There was no detection of isobutane in the method blank at or above the RL.

2.4 Laboratory Control Sample

LCSs were analyzed at the proper frequency for the number and types of samples analyzed (one per batch of 20 samples). One LCS/LCSD pair was reported. The recoveries were within the laboratory specified acceptance limits.

It was noted that the RPD result for the LCS/LCSD pair was not reported. Based on professional and technical judgment, no qualifications were applied to the data since the LCS/LCSD recoveries were within the laboratory specified acceptance limits.

2.5 Field Duplicate

One field duplicate sample, RISVCL-05C-050516-DUP, was collected with the data set. Acceptable precision (RPD <30%) was demonstrated between the field duplicate and the original sample, RISVCL-05C-050516. The RPD between the results was 0%.



2.6 Sensitivity

The samples were reported to the RL. Elevated non-detect results were reported due to the sample dilutions.

2.7 Electronic Data Deliverable Review

Results and sample IDs in the EDD were reviewed against the information provided by the associated level II report at a minimum of 20% as part of the data validation process. No discrepancies were identified between the level II report and the EDD.

* * * * *



ATTACHMENT 1 DATA VALIDATION QUALIFIER DEFINITIONS

AND INTERPRETATION KEY Assigned by Geosyntec’s Data Validation Team

DATA QUALIFIER DEFINITIONS U The analyte was analyzed for, but was not detected above the reported sample quantitation

limit.

J The analyte was positively identified; the associated numerical value is the approximate concentration of the analyte in the sample.

J+ The analyte was positively identified; however, the associated numerical value is likely to be higher than the concentration of the analyte in the sample due to positive bias of associated QC or calibration data or attributable to matrix interference.

J- The analyte was positively identified; however, the associated numerical value is likely to be lower than the concentration of the analyte in the sample due to negative bias of associated QC or calibration data or attributable to matrix interference.

UJ The analyte was not detected above the reported sample quantitation limit. However, the reported quantitation limit is approximate and may or may not represent the actual limit of quantitation necessary to accurately and precisely measure the analyte in the sample.

R The sample results are rejected due to serious deficiencies in the ability to analyze the sample and meet quality control criteria. The presence or absence of the analyte cannot be verified.



ATTACHMENT 2 DATA VALIDATION REASON CODES

Assigned by Geosyntec’s Data Validation Team

Valid Value Description

1 Preservation requirement not met

2 Analysis holding time exceeded

3 Blank contamination (i.e., method, trip, equipment, etc.)

4 Matrix spike/matrix spike duplicate recovery or RPD outside limits

5 LCS recovery outside limits

6 Surrogate recovery outside limits

7 Field Duplicate RPD exceeded

8 Serial dilution percent difference exceeded

9 Calibration criteria not met

10 Linear range exceeded

11 Internal standard criteria not met

12 Lab duplicates RPD exceeded

13 Other

casmalia site remediation projectsemspub.epa.gov/work/09/1159815.pdfcasmalia site remediation...

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