The URL can be used to link to this page

Home My Public Portal About01%20-%20Hwy%2089%20Truckee%20Mousehole%20ADL%20Report.909 1 i i r ' rYCJ " '�Tk ;�' . l��i1j0r""rJ� ✓ire Ilyi'"�,� r ✓u r ✓ " rl i/ i i �rG,// I,� f r r" E DS ,2 PREPARED FOR: CALIFORNIA DEPARTMENT OF TRANSPORTATION - DISTRICT 3 ENVIRONMENTAL ENGINEERING OFFICE P.O. BOX 911 MARYSVILLE, CALIFORNIA 95901 CoLans PREPARED BY GEOCON CONSULTANTS, INC. mmouu„� 3160 GOLD VALLEY DRIVE, SUITE 800 RANCHO CORDOVA, CALIFORNIA 95742 GEOICON GEOCON PROJECT NO. 59300-06-82 TASK ORDER NO. 82, EA NO. 03-1 C0800 CONTRACT NO. 03A1368 SEPTEMBER 2009 MEE= CO NSULTANTS, INC. G E O T E C H N I C A L E N V I R O N M E N T A L M A T E R I A L S Project No. S9300-06-82 September 24, 2009 Ms. Alicia Beyer California Department of Transportation—District 3 Environmental Engineering Office P.O. Box 911 Marysville, California 95901 Subject: 03-PLA-89 PM 21.4/21.7 AND 03-NEV-89 PM 0.010.4 TRUCKEE, PLACER AND NEVADA COUNTIES, CALIFORNIA CONTRACT NO. 03A1368,TASK ORDER NO. 82, EA 03-IC0800 AERIALLY DEPOSITED LEAD,TRAFFIC STRIPE PAINT,AND ASBESTOS SITE INVESTIGATION REPORT Dear Ms.Beyer; In accordance with California Department of Transportation (Caltrans) Contract No. 03A1368, Task Order Number 82, and Expense Authorization 03-IC0800, Geocon Consultants, Inc. has performed environmental engineering services for the subject project. The Site consists of Caltrans right-of-way along Highway 89 from Post Mile (PM) 21.4 to 21.7 in Placer County and from PM OA to 0.4 in Nevada County, California. The accompanying report summarizes the services performed, including the advancement of 18 hand-auger borings for shallow soil sampling, traffic stripe and tunnel wall paint sampling, and laboratory testing. We have prepared a separate Site Investigation report for evaluation of the Union Pacific Railroad embankment within the project limits. The contents of this report reflect the views of the author, who is responsible for the facts and accuracy of the data presented herein. The contents do not necessarily reflect the official views or policies of the State of California or the Federal Highway Administration. This report does not constitute a standard, specification, or regulation. Please contact us if there are any questions concerning the contents of this report or if we may be of further service. Sincerely, GEOCON CONSULTANTS,INC. � 3acob�GT{�`y Gemma G. Reblando Jeremy J. Zorne, PE, GE No.060936 Project Geologist Project Manager '1213i1�� q IV GGR:JJZ:j aj �CA!-�F� (5 +2 CDs) Addressee 3160 Gold Valley Drive,Suite 800 m Rancho Cordova,California 95742 m Telephone (916)852-9118 m Fax(916)852-9132 TABLE OF CONTENTS AERIALLY DEPOSITED LEAD, TRAFFIC STRIPE PAINT, AND ASBESTOS SITE INVESTIGATION REPORT Page 1.0 INTRODUCTION..................................................................................................................... 1 1.1 Project Description and Proposed Improvements........................................................ 1 1.2 General Objectives....................................................................................................... 1 2.0 BACKGROUND....................................................................................................................... 1 2.1 Potential Lead Soil Impacts ......................................................................................... 1 2.2 Hazardous Waste Determination Criteria.................................................................... 1 2.3 DTSC Variance............................................................................................................2 3.0 SCOPE OF SERVICES ............................................................................................................4 3.1 Pre-field Activities.......................................................................................................4 3.2 Field Activities.............................................................................................................4 4.0 INVESTIGATIVE METHODS................................................................................................4 4.1 Boring and Paint Sample Location Rationale..............................................................4 4.2 Soil Sampling Procedures............................................................................................5 4.3 Paint Sampling Procedures ..........................................................................................5 4.4 Traffic Control.............................................................................................................6 4.5 Laboratory Analyses....................................................................................................6 4.5.1 Lead.................................................................................................................6 4.5.2 Asbestos..........................................................................................................6 4.6 Quality Assurance/Quality Control..............................................................................6 5.0 FIELD OBSERVATIONS AND INVESTIGATIVE RESULTS.............................................7 5.1 Soil Conditions.............................................................................................................7 5.2 ADL Soil Analytical Results........................................................................................7 5.3 Paint Sample Analytical Results..................................................................................7 5.4 Asbestos Results ..........................................................................................................7 5.5 Laboratory QA/QC ......................................................................................................7 5.6 Statistical Evaluation for Lead Detected in Soil Samples............................................8 5.6.1 Calculating the UCLs for the Arithmetic Mean..............................................8 6.0 CONCLUSIONS AND RECOMMENDATIONS....................................................................9 6.1 ADL Soil Waste Classification/Disposal.....................................................................9 6.2 Traffic Stripe and Tunnel Wall Paint Waste Classification/Disposal..........................9 6.3 Asbestos.......................................................................................................................9 6.4 Worker Protection........................................................................................................9 7.0 REPORT LIMITATIONS....................................................................................................... 10 FIGURES 1. Vicinity Map 2-1 through 2-3. Site Plans TABLES 1. Summary of Soil Boring Coordinates, Lead and Soil pH Analytical Results 2. Summary of Paint Sample Analytical Results 3. Summary of Asbestos Analytical Results TABLE OF CONTENTS (continued) APPENDICES A. DTSC Variance B. Laboratory Reports and Chain-of-custody Documentation C. Lead Statistics AERIALLY DEPOSITED LEAD, TRAFFIC STRIPE PAINT, AND ASBESTOS SITE INVESTIGATION REPORT 1.0 INTRODUCTION This Aerially Deposited Lead (ADL), Traffic Stripe Paint, and Asbestos Site Investigation Report for the 03-PLA-89 Post Mile (PM) 21.4/21.7 and 03-NEV-89 PM 0.0/0.4 project was prepared by Geocon Consultants, Inc.under California Department of Transportation (Caltrans) Contract No. 03AI368, Task Order(TO)Number 82, and Expense Authorization (EA) 03-IC0800. 1.1 Project Description and Proposed Improvements The project area consists of Caltrans right-of-way along the northbound and southbound shoulders of State Route 89 (SR-89) from the Donner Creek underpass (locally known as the "Mousehole," Caltrans Bridge No. 17-16) to approximately 500 feet south of West River Street, approximate PM 21.4 to 21.7 in Placer County and from PM 0.0 to 0.4 in Nevada County (the Site), California. Future improvements may include widening SR-89, widening (replacing) the existing Mousehole Tunnel and constructing a second vehicular tunnel and a separate pedestrianibicycle tunnel. The approximate project location is depicted on the Vicinity Map, Figure 1, and Site Plans, Figures 2-1 through 2-3. 1.2 General Objectives The purpose of the scope of work outlined in TO No. 82 was to evaluate whether impacts due to ADL from motor vehicle exhaust exist in the surface and near surface soils within the project boundaries and to determine whether the yellow and white traffic stripe paint on the roadway and tunnel walls contains lead. The investigative results will be used by Caltrans to inform the construction contractor(s) if lead- impacted soil and lead-containing paint are present within the project boundaries for health, safety, and soil management/disposal purposes. 2.0 BACKGROUND 2.1 Potential Lead Soil Impacts Ongoing testing by Caltrans throughout California has indicated that ADL exists along major freeway routes due to historic emissions from vehicles formerly powered by leaded gasoline. 2.2 Hazardous Waste Determination Criteria Regulatory criteria to classify a waste as "California hazardous" for handling and disposal purposes are contained in the CCR, Title 22, Division 4.5, Chapter 11, Article 3, § 66261.24. Criteria to classify a waste as "Resource, Conservation, and Recovery Act(RCRA)hazardous" are contained in Chapter 40 of the Code of Federal Regulations (40 CFR), Section 261. 03-PLA-89 PM 21.4/21.7 and 03-NEV-89 PM 0.0/0.4,TO No.82 Caltrans Contract 03A1368,EA No.03-1C0800 Project No.S9300-06-82 - 1 - September 24,2009 For waste containing metals, the waste is classified as California hazardous when: 1) the total metal content exceeds the respective Total Threshold Limit Concentration (TTLC); or 2) the soluble metal content exceeds the respective Soluble Threshold Limit Concentration (STLC) based on the standard Waste Extraction Test (WET). A waste may have the potential of exceeding the STLC when the waste's total metal content is greater than or equal to ten times the respective STLC value, since the WET uses a 1:10 dilution ratio. Hence, when a total metal is detected at a concentration greater than or equal to ten times the respective STLC, and assuming that 100 percent of the total metals are soluble, soluble metal analysis is required. A material is classified as RCRA hazardous, or Federal hazardous, when the soluble metal content exceeds the Federal regulatory level based on the Toxicity Characteristic Leaching Procedure (TCLP). The TTLC value for lead is 1,000 milligrams per kilogram (mg/kg). The STLC and TCLP values for lead are both 5.0 milligrams per liter(mg/1). The above regulatory criteria are based on chemical concentrations. Wastes may also be classified as hazardous based on other criteria such as ignitability and corrosivity; however, for the purposes of this investigation, toxicity (i.e., lead concentrations) is the primary factor considered for waste classification since waste generated during the construction activities would not likely warrant testing for ignitability or corrosivity. Waste that is classified as either California-hazardous or RCRA-hazardous requires management as a hazardous waste. The Department of Toxic Substances Control(DTSC) regulates and interprets hazardous waste laws in California. DTSC generally considers excavated or transported materials that exhibit "hazardous waste" characteristics to be a "waste" requiring proper management, treatment and disposal. Soil that contains lead above hazardous waste thresholds and is left in-place would not be necessarily classified by DTSC as a"waste." The DTSC has provided site-specific determinations that"movement of wastes within an area of contamination does not constitute "land disposal" and, thus, does not trigger hazardous waste disposal requirements." Therefore, lead-impacted soil that is scarified in-place, moisture-conditioned, and recompacted during roadway improvement activities might not be considered a "waste." DTSC should be consulted to confirm waste classification. It is noted that in addition to DTSC regulations, health and safety requirements and other local agency requirements may also apply to the handling and disposal of lead-impacted soil. 2.3 DTSC Variance The DTSC issued a statewide Variance effective July 1, 2009, regarding the reuse of ADL-impacted soils within Caltrans right-of-way. Under the Variance, soil that is classified as a non-RCRA hazardous waste, based primarily on ADL content, may be suitable for reuse within Caltrans right-of-way. ADL soil that is classified as a RCRA hazardous waste is not eligible for reuse under the Variance and must be disposed of as a RCRA hazardous waste (Caltrans Type Z3). 03-PLA-89 PM 21.4/21.7 and 03-NEV-89 PM 0.0/0.4,TO No.82 Caltrans Contract 03A1368,LA No.0-1C0800 Project No.S9300-06-82 -2- September 24,2009 ADL soil reused under the Variance must always be at least 5 feet above the highest groundwater elevation and, depending on lead concentrations, must be covered with at least one foot of non- hazardous soil or a pavement structure. The ADL soil may not be placed in areas where it might contact groundwater or surface water(such as streams and rivers), and must be buried in locations that are protected from erosion that may result from storm water run-on and run-off. Review of the statewide Variance indicates the following conditions regarding the reuse and management of ADL-impacted soil as fill material for construction and maintenance operations. If ADL soil meets the Variance criteria but is not intended to be reused within Caltrans right-of-way, then the excavated soil must be disposed of as a California hazardous waste (Caltrans Type Z2). A copy of the DTSC Variance is presented in Appendix A. Caltrans Type Y1 ADL soil exhibiting a total lead concentration less than or equal to 1,411 mg/kg, a soluble lead concentration (based on a modified WET using deionized water as the extractant [DI-WET]) less than or equal to 1.5 mg/l, and a pH value greater than or equal to 5.5 may be reused within the same Caltrans corridor and must be covered with at least one foot of non-hazardous soil. Caltrans Type Y2 ADL soil exhibiting a total lead concentration less than or equal to 1,411 mg/kg, a DI-WET soluble lead concentration less than or equal to 1.5 mg/l, and a pH value greater than 5 and less than 5.5 may be reused within the same Caltrans corridor and must be covered and protected from infiltration by a pavement structure. ADL soil exhibiting a total lead concentration less than or equal to 1,411 mg/kg, a DI-WET soluble lead concentration greater than 1.5 mg/l and less than or equal to 150 mg/l, and a pH value greater than 5 may be reused within the same Caltrans corridor and must be covered and protected from infiltration by a pavement structure. ADL soil exhibiting a total lead concentration greater than 1,411 mg/kg and less than or equal to 3,397 mg/kg, a DI-WET (using deionized water as the extractant) soluble lead concentration less than or equal to 150 mg/l, and a pH value greater than 5 may be reused within the same Caltrans corridor and must be covered and protected from infiltration by a pavement structure. Caltrans Type Z2 ADL soil exhibiting a total lead concentration greater than 3,397 mg/kg, a DI-WET soluble lead concentration greater than 150 mg/l, or a pH value less than or equal to 5 is not eligible for reuse under the Variance and must be disposed of as a California hazardous waste. 03-PLA-89 PM 21.4/21.7 and 03-NEV-89 PM 0.0/0.4,TO No.82 Caltrans Contract 03A1368,LA No.0-1C0800 Project No.S9300-06-82 -3 - September 24,2009 Caltrans Type Z3 ADL soil exhibiting a TCLP soluble lead concentration greater than or equal to 5 mg/l is not eligible for reuse under the Variance and must be disposed of as a RCRA hazardous waste. 3.0 SCOPE OF SERVICES We performed the following scope of services as requested by Caltrans in TO No. 82: 3.1 Pre-field Activities • Caltrans Quality Assurance Manager Alicia Beyer, Associate Environmental Planner Denise Gibson and Geocon representatives Jeremy Zorne and Gemma Reblando conducted a pre-work site visit on July 28, 2009, to identify and observe the project boundaries and conditions. The project limits were further outlined in white paint for subsequent utility clearance. • Prepared a Health and Safety Plan dated August 10, 2009, to provide guidelines on the use of personal protective equipment and the health and safety procedures implemented during the field activities. • Provided 48-hour notification to Underground Service Alert prior to job site mobilization. • Retained the services of Advanced Technology Laboratories (ATL) to perform the chemical analysis of soil and traffic stripe paint samples. • Retained the services of EMSL Analytical, Inc. to perform the asbestos analysis of soil samples. 3.2 Field Activities The field activities consisted of collecting soil samples along the northbound and southbound shoulder of SR-89 within the project limits. On August 24, 2009, 45 soil samples were collected from 18 hand- auger borings at the Caltrans designated soil sampling locations. The soil borings were excavated to approximate depths ranging from 2.0 to 3.0 feet. Soil samples were collected at general depths of 0 to 1.0 foot, 1.0 to 2.0 feet and 2.0 to 3.0 feet. At some locations, excavation refusal was encountered between depths of 1.0 and 2.0 feet. We also collected one yellow and one white traffic stripe paint samples (YPC and WPC), and one white paint sample from the Mousehole Tunnel (Tunnel PC) at the Caltrans designated sampling locations. 4.0 INVESTIGATIVE METHODS 4.1 Boring and Paint Sample Location Rationale The soil boring locations were designated by Caltrans in the vicinity of proposed improvements. Borings HSI through HS9 were advanced along the shoulder of southbound SR-89. Borings HN10 through HN18 were advanced along the shoulder of northbound SR-89. The approximate soil boring locations are depicted on Figures 2-1 through 2-3. 03-PLA-89 PM 21.4/21.7 and 03-NEV-89 PM 0.0/0.4,TO No.82 Caltrans Contract 03A1368,LA No.0-1C0800 Project No.S9300-06-82 -4- September 24,2009 The paint samples were collected at locations designated by Caltrans within the proposed construction area. The yellow traffic stripe paint sample (YPC) was collected from the yellow centerline of SR-89 just north of the Mousehole Tunnel. The white traffic stripe paint sample (WPC) was collected from the white traffic stripe paint along the shoulder of southbound SR-89 just north of the Mousehole Tunnel. The tunnel wall paint sample (Tunnel PC) was collected on the west side of the Mousehole Tunnel wall. The approximate paint sample locations are depicted on Figure 2-2. The coordinates of each boring location were determined using a differential global positioning system (GPS). The GPS was utilized during the field activities to locate the horizontal position of each location with an error of no more than 3.3 feet. The latitude and longitude of the boring locations are summarized in Table 1. 4.2 Soil Sampling Procedures A total of 45 soil samples were collected from 18 hand-auger borings excavated at the Site. The soil samples were collected and transferred directly from the hand-auger to a Ziploc° re-sealable plastic bag. The soil samples were field homogenized within the sample bags and subsequently labeled,placed in an ice chest, and delivered to ATL for analytical testing under chain-of-custody (COC) documentation. QA/QC procedures were performed during the field exploration activities. These procedures included decontamination of sampling equipment before each boring was advanced and providing COC documentation for each sample submitted to the laboratory. The soil sampling equipment was cleansed between each boring by washing the equipment with an Alconox"solution followed by a double rinse with deionized water. The field sampling activities were performed under the supervision of Geocon's field manager. The borings were backfilled with the excess soil cuttings generated at each boring. The decontamination water was discharged to the ground surface away from surface water bodies or storm drain inlets. 4.3 Paint Sampling Procedures The traffic stripe paint samples were collected using a hammer to break a chip off the traffic stripe paint. The paint sample from the tunnel wall was collected by scraping paint flakes from the wall. The paint samples were placed in Ziploc° re-sealable plastic bags, subsequently labeled, and delivered to ATL under standard COC documentation. 03-PLA-89 PM 21.4/21.7 and 03-NEV-89 PM 0.0/0.4,TO No.82 Caltrans Contract 03A1368,LA No.0-1C0800 Project No.S9300-06-82 - 5 - September 24,2009 4.4 Traffic Control Traffic control, including the use of a "SHOULDER WORK AHEAD" advanced warning signs and orange traffic cones, provided by Geocon, was utilized where necessary based on the proximity of the work zone with respect to the active traffic lanes. 4.5 Laboratory Analyses The soil and paint samples collected within the project boundaries were submitted to ATL and EMSL for laboratory analyses under standard ten-day turn-around-time (TAT). 4.5.1 Lead The soil and paint samples were submitted to ATL for the following analyses. The laboratory was instructed to homogenize the soil samples prior to analysis for lead in accordance with Contract 03A 13 68 requirements. • Forty-five soil samples were analyzed for total lead following United States Environmental Protection Agency(EPA) Test Method 6010B. • Three paint samples were analyzed for total lead following EPA Test Method 6010B. • Two randomly selected soil samples were analyzed for soil pH following EPA Test Method 9045. 4.5.2 Asbestos Soil samples HS8-0, HN13-2 and HN16-1 were submitted to EMSL for asbestos analysis by polarized light microscopy (PLM) using California Air Resources Board (CARB) Method 435 (CARB 435 PLM Method A)under standard TAT. The analytical sensitivity of the PLM analysis was 0.25%. 4.6 Quality Assurance/Quality Control QA/QC procedures were performed for each method of analysis with specificity for each analyte listed in the test method's QA/QC.The laboratory QA/QC procedures included the following: • One method blank for every ten samples,batch of samples or type of matrix,whichever was more frequent. • One sample analyzed in duplicate for every ten samples, batch of samples or type of matrix, whichever was more frequent. • One spiked sample for every ten samples, batch of samples or type of matrix, whichever was more frequent,with the spike made at ten times the reporting limit or at the analyte level. Prior to submitting the soil samples to the laboratory, the COC documentation was reviewed for accuracy and completeness. Reproductions of the laboratory reports and COC documentation are presented in Appendix B. 03-PLA-89 PM 21.4/21.7 and 03-NEV-89 PM 0.0/0.4,TO No.82 Caltrans Contract 03A1368,LA No.0-1C0800 Project No.S9300-06-82 - 6- September 24,2009 5.0 FIELD OBSERVATIONS AND INVESTIGATIVE RESULTS 5.1 Soil Conditions Soil encountered during the excavation of borings was generally comprised of gravelly, sandy silt with cobbles at depths between 1.0 and 2.0 feet to the maximum sampling depth of approximately 3.0 feet. Groundwater was not encountered in the soil borings. 5.2 ADL Soil Analytical Results Total lead was detected in 32 of 45 soil samples at concentrations ranging from 5.1 to 52 mg/kg. Two of the 45 soil samples had reported total lead concentrations greater than 50 mg/kg (ten times the STLC value for lead of 5.0 mg/1). Soil pH values for the two soil samples analyzed were 7.9 and 7.7. A summary of the soil analytical results are presented in Table 1. The laboratory reports and COC documentation are presented in Appendix B. 5.3 Paint Sample Analytical Results Total lead was not reported for yellow and white traffic stripe paint samples YPC and WPC,respectively. Total lead was reported for the paint sample from the tunnel wall(Tunnel PC) at 2.6 mg/kg. The analytical results of the paint samples are summarized on Table 2. Laboratory reports and COC documentation are presented in Appendix B. 5.4 Asbestos Results Three soil samples were analyzed by EMSL for asbestos by the PLM method using the CARB 435 sample preparation method. None of the three soil samples submitted for asbestos analysis were reported to contain asbestos at or greater than the PLM laboratory reporting limit of 0.25%. The analytical laboratory reported each of the samples as 100%non-fibrous. A summary of the asbestos analytical results are presented in Table 3. The laboratory reports and COC documentation are presented in Appendix B. 5.5 Laboratory QA/QC We reviewed the laboratory QA/QC provided with the laboratory reports. The data show acceptable surrogate recoveries and non-detect results for the method blanks. However, the relative percent differences (RPDs) for EPA Method 6010 were outside the RPD limit. The Case Narrative in the laboratory report states "RPD for Duplicate (DUP) is outside criteria for samples 107096-006ADUP, 03-PLA-89 PM 21.4/21.7 and 03-NEV-89 PM 0.0/0.4,TO No.82 Caltrans Contract 03A1368,LA No.0-1C0800 Project No.S9300-06-82 - 7- September 24,2009 107096-016ADUP, 107096-026ADUP, 107119-002ADUP and 107120-001ADUP; however, the Laboratory Control Sample (LCS) validated the analytical batch." The data showed acceptable recoveries and RPDs for the remainder of the matrix spikes and duplicates. Based on this limited data review, no additional qualifications of the soil and paint sample data are necessary, and the data are of sufficient quality for the purposes of this report. 5.6 Statistical Evaluation for Lead Detected in Soil Samples Statistical methods were applied to the total lead data to evaluate the upper confidence limits (UCLs) of the arithmetic means of the total lead concentrations for each sampling depth. The statistical methods used are discussed in a book entitled Statistical Methods for Environmental Pollution Monitoring, by Richard Gilbert; in an EPA Technology Support Center Issue document entitled, The Lognormal Distribution in Environmental Applications, by Ashok Singh et. al., dated December 1997; and in a book entitled An Introduction to the Bootstrap, by Bradley Efron and Robert J. Tibshirani. 5.6.1 Calculating the UCLs for the Arithmetic Mean The upper one-sided 90% and 95% UCLs of the arithmetic mean are defined as the values that, when calculated repeatedly for randomly drawn subsets of site data, equal or exceed the true mean 90% and 95% of the time, respectively. Statistical confidence limits are the classical tool for addressing uncertainties of a distribution mean. The UCLs of the arithmetic mean concentration are used as the mean concentrations because it is not possible to know the true mean due to the essentially infinite number of soil samples that could be collected from a site. The UCLs therefore account for uncertainties due to limited sampling data. As data become less limited at a site,uncertainties decrease, and the UCLs move closer to the true mean. Non-parametric bootstrap techniques used to calculate the UCLs are discussed in the previously referenced EPA document and in An Introduction to the Bootstrap. For those samples in which total lead was not detected at concentrations exceeding the laboratory reporting limit, a value equal to one- half of the reporting limit was used in the UCL calculation. The average total lead concentration for the soil samples collected at the Site is 11.7 mg/kg. The bootstrap results are included in Appendix C. The calculated UCLs and statistical results are summarized in the table below: SAMPLE INTERVAL 90%TOTAL 95%TOTAL TOTAL LEAD MINIMUM MAXIMUM (feet) LEAD UCL LEAD UCL MEAN VALUE VALUE (mg/kg) (mg/kg) (mg/kg) (mg/kg) (mg/kg) 0 to 1 19.5 20.5 14.9 2.5 52 1 to 2 11.4 12.1 9.1 2.5 32 2 to 3 15.1 16.7 10.4 2.5 32 03-PLA-89 PM 21.4/21.7 and 03-NEV-89 PM 0.0/0.4,TO No.82 Caltrans Contract 03A1368,EA No.0-1C0800 Project No.S9300-06-82 - g- September 24,2009 6.0 CONCLUSIONS AND RECOMMENDATIONS 6.1 ADL Soil Waste Classification/Disposal Based on the results of our investigation, soil materials excavated to the maximum sampling depth of 3.0 feet within the project boundary will not require special soil handling and disposal procedures based on lead content and can be reused or disposed of as non-hazardous soil since the calculated 90% and 95% total lead UCLs are less than 50 mg/kg. 6.2 Traffic Stripe and Tunnel Wall Paint Waste Classification/Disposal The yellow and white traffic stripe paint was sampled per Caltrans' request since it may be removed from the underlying asphalt concrete by grinding or sand blasting, which would create a paint waste stream. The analytical results of the traffic stripe paint will be used by Caltrans to provide contractors with preliminary analytical data of the traffic stripe paint. Total lead was not detected in the yellow and white traffic stripe paint samples (YPC and WPC) collected at the Site at concentrations exceeding the respective laboratory reporting limits. Total lead was detected in the paint sample from the Mousehole Tunnel (Tunnel PC) at 2.6 mg/kg, less than ten times the STLC value for lead of 5.0 mg/l. Thus, the yellow and white traffic stripe paint and the Mousehole Tunnel wall paint will not require disposal as a California hazardous waste since the total lead concentrations are less than 50 mg/kg (i.e. ten times the STLC value for lead of 5.0 mg/1). 6.3 Asbestos The soil samples submitted for asbestos analysis were not reported to contain asbestos at or greater than the laboratory reporting limit of 0.25% by the PLM method. Based on the lack of reported asbestos in soil at the Site, engineering controls to minimize the aerial dispersion of asbestos are not required. 6.4 Worker Protection Per Caltrans' requirements, the contractor(s) should prepare a project-specific Lead Compliance Plan (CCR Title 8, Section 1532.1, the "Lead in Construction" standard) to minimize worker exposure to lead-impacted soil and removed yellow traffic paint residue. The Lead Compliance Plan should include protocols for environmental and personnel monitoring, requirements for personal protective equipment, and other health and safety protocols and procedures for the handling of lead-impacted soil and lead- containing yellow traffic stripe paint. The Lead Compliance Plan shall be approved by an Industrial Hygienist certified by the American Board of Industrial Hygiene. 03-PLA-89 PM 21.4/21.7 and 03-NEV-89 PM 0.0/0.4,TO No.82 Caltrans Contract 03A1368,LA No.0-1C0800 Project No.S9300-06-82 -9- September 24,2009 7.0 REPORT LIMITATIONS This report has been prepared exclusively for Caltrans. The information contained herein is only valid as of the date of the report and will require an update to reflect additional information obtained. This report is not a comprehensive site characterization and should not be construed as such. The findings as presented in this report are predicated on the results of the limited sampling and laboratory testing performed. In addition, the information obtained is not intended to address potential impacts related to sources other than those specified herein. Therefore, the report should be deemed conclusive with respect to only the information obtained. We make no warranty, express or implied, with respect to the content of this report or any subsequent reports, correspondence or consultation. We strived to perform the services summarized herein in accordance with the local standard of care in the geographic region at the time the services were rendered. 03-PLA-89 PM 21.4/21.7 and 03-NEV-89 PM 0.0/0.4,TO No.82 Caltrans Contract 03A1368,LA No.0-1C0800 Project No.S9300-06-82 - 10- September 24,2009 co N :.c :•::� I ¢ O co IL a FL o � z` o O o m p CF) ~ N I o N Z N - zM w v co ; ani p co 22 a S CD a c '3 U w e O -D x cz I—Sc': I o o W W d�GGo ',.., J°' � O U a _ C O M J N0 M o G o° U'5 � L¢LI �C�d9e _ I o CZ i 0 o 0 00 0 0 v v � Q Z U Z PIIlfilpfi011 IL i Z N ¢ Lai U o CZ C) O W CL W �C �s V pg. cel Pine = Sa . ami iii:`::'.:;•o..�'iir:{•::..:.;:{..� � co f(eM 0 Buuesne� co , o �;�:•jY•f U ` V y co O 00 41 I 4 J G � d U �0 N ay o° da G` 0 o' O' i 'oo o� °2 co c ;z C) QO I O N N ,/ /9 a d o 14.0 JOl' a N O m O C t mull l/ �� qp /Ni 40 / �y / ;% /rc ��f� Us Or OCR Uv l Jr %/ % �G ' r '/ �j w All ca. .F i /M'' �� * /� n5wit wd "�, f go, ,U f/s „U:'r` U�i'1f1 .' r /%p �/�.�% �a%,All 1 1 u � / y /O hApd'/ TO/, l r ,g '/ 71 ' i��i ��/ �G / 1l 9� Ij , Ufr f% SO a �(ll�mair >,,,,, o z w 5 J 2 N N O R O Z LL d d o (g-Z aan6ij aag)awl 4�3eW W 77 ujo f Z 1N d o U m o;, N U m m �� f011 � ZU L z d z ta", r / L To v FRI, par No E " P /// Al Ir Ax w Nis M -M Poe ✓ r 010§ MW J /o Al/ 30, asrow AN hh owl M R� �r r - (�-Z aanb!j aag)Eqj plen o 0 o J 2 m N O R O Z l EL d o W o o H w N 9 z E cb a o m 7. C A O U a o om m O o ).� w Lo .IL m.° z m r 0 ,� �.. �, /O7 r �/c m >m "a o �rt ,�� 1� � 9, g z P" _ �lli e»>ionaiawrrmraniiiiiir % i I o � o 0 fill, % Ile ff orf ii mar' i i �//r J „. y rye V,t »ia �lr xT ,5 P? 11 J�j0 '�U////��t m // F ii/ ri x �if Iv' r x i% �Ir x2 'err eA / ,��1 z a roe l J O O] Q O LLl V�io"H N J = Project No.S9300-06-82 September 24,2009 Page 1 of 2 TABLE 1 SUMMARY OF SOIL BORING COORDINATES,LEAD AND SOIL pH ANALYTICAL RESULTS 03-PLA-89 PM 21.4/21.7 AND 03-NEV-89 PM 0.0/0.4 TRUCKEE,PLACER AND NEVADA COUNTIES,CALIFORNIA BORING ID SAMPLE DATE LATITUDE LONGITUDE TOTAL LEAD SOIL pH (mg/kg) HSI-0 8/24/2009 39.321155061 -120.207926793 18 7.9 HS 1-1 8/24/2009 16 --- HS 1-2 8/24/2009 15 --- HS2-0 8/24/2009 39.320493718 -120.207937494 10 --- HS2-1 8/24/2009 7.0 --- HS3-0 8/24/2009 39.319212870 -120.207398931 6.3 --- HS3-1 8/24/2009 <5.0 --- HS3-2 8/24/2009 <5.0 --- HS4-0 8/24/2009 39.318256618 -120.206358048 15 --- HS4-1 8/24/2009 32 --- HS4-2 8/24/2009 32 --- HS5-0 8/24/2009 39.317346729 -120.205284005 11 --- HS5-1 8/24/2009 8.4 --- HS5-2 8/24/2009 <5.0 --- HS6-0 8/24/2009 39.316329526 -120.204467011 9.0 --- HS6-1 8/24/2009 5.5 --- HS7-0 8/24/2009 39.315626689 -120.204173234 17 7.7 HS7-1 8/24/2009 21 --- HS8-0 8/24/2009 39.315129958 -120.204085279 9.4 --- HS8-1 8/24/2009 10 --- HS8-2 8/24/2009 <5.0 --- HS9-0 8/24/2009 39.313879478 -120.204112294 51 --- HS9-1 8/24/2009 6.0 --- HN10-0 8/24/2009 39.313430342 -120.204052117 52 --- HN10-1 8/24/2009 6.6 --- HN11-0 8/24/2009 39.314480231 -120.203759777 5.1 --- HNII-1 8/24/2009 5.6 --- TIN 11-2 8/24/2009 <5.0 --- HN12-0 8/24/2009 39.315820863 -120.203980554 <5.0 --- HN12-1 8/24/2009 <5.0 --- HN13-0 8/24/2009 39.316964106 -120.204653483 <5.0 --- HN13-1 8/24/2009 <5.0 --- HN13-2 8/24/2009 <5.0 --- HN14-0 8/24/2009 39.317447065 -120.205164533 32 --- HN14-1 8/24/2009 11 --- HN15-0 8/24/2009 39.318055619 -120.205909027 7.0 --- HN15-1 8/24/2009 7.4 --- HN15-2 8/24/2009 7.1 --- Project No.S9300-06-82 September 24,2009 Page 2 of 2 TABLE 1 SUMMARY OF SOIL BORING COORDINATES,LEAD AND SOIL pH ANALYTICAL RESULTS 03-PLA-89 PM 21.4/21.7 AND 03-NEV-89 PM 0.0/0.4 TRUCKEE,PLACER AND NEVADA COUNTIES,CALIFORNIA BORING ID SAMPLE DATE LATITUDE LONGITUDE TOTAL LEAD SOIL pH (mg/kg) HN16-0 8/24/2009 39.318835833 -120.206736888 10 --- HN16-1 8/24/2009 15 --- HN17-0 8/24/2009 39.319975973 -120.207412908 7.4 --- HN17-1 8/24/2009 <5.0 --- HN17-2 8/24/2009 27 --- HN18-0 8/24/2009 39.321164911 -120.207454147 <5.0 --- HN18-1 8/24/2009 <5.0 --- Notes: HSI-0 Top of sample depth interval in feet below ground surface Boring identification mg/kg=Milligrams per kilogram <=Less than the laboratory reporting limit ---=Not analyzed Project No.S9300-06-82 September 24,2009 Page 1 of 1 TABLE 2 SUMMARY OF PAINT SAMPLE ANALYTICAL RESULTS 03-PLA-89 PM 21.4/21.7 AND 03-NEV-89 PM 0.0/0.4 TRUCKEE,PLACER AND NEVADA COUNTIES,CALIFORNIA SAMPLE ID SAMPLE DATE PAINT COLOR LOCATION TOTAL LEAD(mg/kg) Tunnel PC 8/24/2009 White WEST SIDE OF TUNNEL 2.6 YPC 8/24/2009 Yellow MEDIAN CENTERLINE <4.0 WPC 8/24/2009 White SOUTHBOUND SHOULDER <8.0 Notes: mg/kg=Milligrams per kilogram Project No.S9300-06-82 September 24,2009 Page 1 of 1 TABLE 3 SUMMARY OF ASBESTOS ANALYTICAL RESULTS 03-PLA-89 PM 21.4/21.7 AND 03-NEV-89 PM 0.0/0.4 TRUCKEE,PLACER AND NEVADA COUNTIES,CALIFORNIA SAMPLE I.D. SAMPLE DATE ANALYTICAL ASBESTOS% ASBESTOS TYPE METHOD NOA HS8-0 8/24/2009 PLM ND None Reported NOA HN13-2 8/24/2009 PLM ND None Reported NOA HN16-1 8/24/2009 PLM ND None Reported Notes: PLM=Polarized Light Microscopy ND=Not detected APPENDIX It 9�AL•OF tH w B m r o �fl?FORN� i California Environmental Protection Agency Department of Toxic Substances Control VARIANCE Applicant Names: Variance No. V09HQSCD006 State of California Effective Date: July 1, 2009 i Department of Transportation (Caltrans) Expiration Date: July 1, 2014 1120 N Street Sacramento, California 95814 Modification History: Pursuant to California Health and Safety Code, Section 25143,the Department of Toxic Substances Control hereby issues the attached Variance consisting of 9 pages to the Department of Transportation. Beverl ala Team Leader, Operating Facilities Team Department of Toxic Substances Control Date: �� '/ r, VARIANCE 3 I i 1. INTRODUCTION. a) Pursuant to Health and Safety Code, section 25143, the California Department of Toxic Substances Control (DTSC) grants this variance to the applicant below for waste considered to be hazardous solely because of its lead concentrations and as further specified herein. b DTSC hereby grants Y rants this variance only from the requirements specified herein and i only in accordance with all terms and conditions specified herein. 2. IDENTIFYING INFORMATION. i APPLICANT/OWNER/OPERATOR State of California Department of Transportation, (Caltrans) All Districts 3. TYPE OF VARIANCE. Generation, Manifest, Transportation, Storage and Disposal. 4. ISSUANCE AND EXPIRATION DATES. DATE ISSUED: July 1, 2009 EXPIRATION DATE: July 1, 2014 5. APPLICABLE STATUTES AND REGULATIONS. The hazardous waste that is the subject of this variance is fully regulated under Health and Safety Code, section 25100, et seq. and California Code of Regulations, title 22, division 4.5 except as specifically identified in Section 8 of this variance. 6. DEFINITION. For purposes of this variance, "lead-contaminated soil(s)" shall mean soil that meets the criteria for hazardous waste but contains less than 3397 mg/kg total lead and is hazardous primarily because of aerially-deposited lead contamination associated with exhaust emissions from the operation of motor vehicles. 7. FINDINGS/DETERMINATIONS. DTSC has determined that the variance applicant meets the requirements set forth in Health and Safety Code, section 25143 for a variance from specific regulatory requirements as outlined in Section 8 of this variance. The specific determinations and findings made by DTSC are as follows: a) Caltrans intends to excavate, stockpile, transport, bury and cover large volumes of soil associated with Highway construction projects. In the more urbanized highway corridors around the State this soil is contaminated with lead, primarily due to historic emissions from automobile exhausts. In situ sampling and laboratory testing has shown that some of the soil contains concentrations of lead in excess of State regulatory thresholds, and thus any generated waste from disturbance of the soil -2- would be regulated as hazardous waste. Such soil contains a Total Threshold Limit Concentration (TTLC) of 1000 milligrams per kilogram (mg/kg) or more lead and/or it meets or exceeds the Soluble Threshold Limit Concentration .(STLC) for lead of 5 milligrams per liter (mg/1). A Human Health Risk Assessment prepared for this h elevated concentrations of lead can variance concludes that soil contaminated with be managed in a way that presents no significant risk to human health. soil will be laced only in Caltrans right-of-way. b) The lead-contaminatedp y Depending on concentration levels, the wastes will be covered with a minimum thickness of one (1) foot of non-hazardous soil or asphalt/concrete cover and will always be at least five (5) feet above the highest groundwater elevation. Caltrans will assure that proper health and safety procedures will be followed for workers, including any persons engaged in maintenance work in areas where the waste has been buried and covered. c) DTSC finds and requires that the lead-contaminated soil excavated, stockpiled, transported, buried and covered pursuant to this variance is a non-RCRA hazardous waste, and that the waste management activity is insignificant as a potential hazard to human health and safety and the environment, when managed in accordance with the conditions, limitations and other requirements specified in this variance. I 8. PROVISIONS WAIVED. i Provided Caltrans meets the terms and conditions of this variance, DTSC waives the hazardous waste management requirements of Health and Safety Code, Chapter 6.5 and California Code of Regulations, title 22 for the lead-contaminated soil that Caltrans reuses in projects that would require Caltrans to obtain a permit for a disposal facility and any other generator requirements that concern the transportation, manifesting, storage and land disposal of hazardous waste. 9. SPECIFIC CONDITIONS LIMITATIONS AND OTHER REQUIREMENTS. In order for the provisions discussed in section 8 to be waived, lead-contaminated soil must not exceed the contaminant concentrations discussed below and Caltrans management practices must meet all the following conditions: a) Caltrans implementation of this variance shall comply with all applicable state laws and regulations for water quality control, water quality control plans, waste discharge requirements (including storm water permits), and others issued by the State Water Resources Control Board (SWRCB) and/or a California Regional Water Quality Control Board (RWQCB).. Caltrans shall provide written notification to the appropriate RWQCB at least 30 days prior to advertisement for bids of projects that involve invocation of this variance, or as otherwise negotiated with the SWRCB or appropriate RWQCB. b) The waivers in this variance shall only be applied to lead-contaminated soil that is not a RCRA hazardous waste and is hazardous primarily because of aerially- -3- i I i i 1 i deposited lead contamination associated with exhaust emissions from the operation of motor vehicles. The variance is not applicable to any other hazardous waste. c) Soil containing 1.5 mg/I extractable lead or less (based on a modified waste I extraction test using deionized water as the extractant) and 1411 mg/kg or less total lead may be used as fill provided that the lead-contaminated soil is placed a minimum of five (5) feet above the maximum historic water table elevation and covered with at least one (1) foot of nonhazardous soil that will be maintained by Caltrans to prevent future erosion. I based on a modified waste less d) Soil containing 150 mglL extractable lead or ( extraction test using deionized water as the extractant) and 3397 mg/kg or less total lead may be used as fill provided that the lead-contaminated soils are placed a minimum of five (5) feet above the maximum historic water table elevation and protected from infiltration by a pavement structure which will be maintained by Caltrans. e) Lead-contaminated soil with a pH less than 5.5 but greater than 5.0 shall only be ' used as fill material under the paved portion of the roadway. Lead-contaminated soil with a pH at or less than 5.0 shall be managed as a hazardous waste. f) For each project that has the potential to generate waste by disturbing lead- contaminated soil (as defined in 6), Caltrans shall conduct sampling and analysis to, adequately characterize the soils containing aerially deposited lead in the areas of planned excavation along the project route. Such sampling and analysis shall include the Toxicity Characteristic Leaching Procedure (TCLP) as prescribed by the United States Environmental Protection Agency to determine whether concentrations of contaminants in soil exceed federal criteria for classification as a hazardous waste. g) Lead-contaminated soil managed pursuant to this variance shall not be moved outside the designated corridor boundaries (see paragraph t) below. All lead- contaminated soil not buried and covered within the same Caltrans corridor where it originated is not eligible for management under this variance and shall be managed as a hazardous waste.. h) Lead-contaminated soil managed pursuant to this variance shall not be placed in areas where it would become in contact with groundwater or surface water (such as streams and rivers). i) Lead-contaminated soil managed pursuant to this variance shall be buried and covered only in locations that are protected from erosion that may result from storm water run-on and run-off. j) The lead-contaminated soil shall be buried and covered in a manner that will prevent accidental or deliberate breach of the asphalt, concrete, and/or cover soil. -4- i I k) The presence of lead-contaminated soil shall be incorporated into the projects' as- built drawings. The as-built drawings shall be annotated with the location, representative analytical data, and volume of lead-contaminated soil. The as-built drawings shall also state the depth of the cover. These as-built drawings shall be retained b ret y Caltrans. 1) Caltrans shall ensure that no other hazardous wastes, other than the lead- contaminated hazardous waste soil, are placed in the burial areas. I m) Lead-contaminated soil shall not be buried within ten (10) feet of culverts or locations subject to frequent worker exposure. I n) Excavated lead-contaminated soil not placed into the designated area (fill area, I roadbed area) by the end of the working day shall be stockpiled and covered with sheets of polyethylene or at least one foot of non-hazardous soil. The lead- contaminated soil, while stockpiled or under transport, shall be protected from contacting surface water and from being dislodged or transported by wind or storm water. The stockpile covers shall be inspected at least once a week and within 24 hours after rainstorms. if the lead-contaminated soil is stockpiled for more than 4 days from the time of excavation, Caltrans shall restrict public access to the stockpile by using barriers that meet the safety requirements of the construction zone. The lead-contaminated soil shall be stockpiled for no more than 90 days from the time the soil is first excavated. If the contaminated soil is stockpiled beyond the 90 day limit Caltrans shall 1. notify DTSC in writing of the 90 day exceedance and expected date of removal; 2. perform weekly inspections of the stockpiled material to ensure that there.is adequate protection from run-on, runoff, public access, and wind dispersion; and 3. notify DTSC on weekly basis of the stockpile status until the stockpile is removed. The lead-contaminated soil shall be stockpiled for no more than 180 days from the time the soil is first excavated. o) Caltrans shall ensure that all stockpiling of lead-contaminated soil remains within the project area of the specified corridor. Stockpiling of lead-contaminated soil within the specified corridor, but outside the project area, is prohibited. p) Caltrans shall conduct confirmatory sampling of any stockpile area in areas not known or expected to contain Lead-contaminated soil after removal of the lead- contaminated soil to ensure that contamination has not been left behind or has not migrated from the stockpiled material to the surrounding soils. q) Caltrans shall stockpile lead-contaminated soil only on high ground (i.e. no sump areas or low points) so that stockpiled soil will not come in contact with surface -5- I water run-on or run-off. r) Caltrans shall not stockpile lead-contaminated soil in environmentally and ecologically sensitive areas. s) Caltrans shall ensure that storm/rain run-off that has come into contact with stockpiled lead-contaminated soil will not flow to storm drains, inlets, or waters of the State. i i t) Caltrans may dispose of the lead-contaminated soil only within the operating right- of-way of an existing highway, as defined in Streets and Highways Code, section 23. Caltrans may move lead-contaminated soil from one Caltrans project to another Caltrans project only if the lead-contaminated soil remains within the same designated corridor. Caltrans shall record any movement of lead-contaminated soil by using a bill of lading. The bill of lading must contain: 1) the US DOT description including shipping name, hazard class and ID number; 2) handling codes; 3) quantity of material; 4) volume of material; 5) date of shipment; 6) origin and destination of shipment; and 7) j any specific handling instructions. The bill of lading shall be referenced in and kept on file with the project's as-built drawings. The lead-contaminated soil must be kept covered during transportation. u) For each specific corridor where this variance is to be implemented, all of the following information shall be submitted in writing to DTSC at least five (5) days before construction of any project begins: 1. plan drawing designating the boundaries of the corridor where lead- contaminated soils will be excavated, stockpiled, buried and covered; i I 2. a list of the Caltrans projects that the corridor encompasses; 3. a list of Caltrans contractors that will be conducting any phase of work on any project affected by this variance.; 4. duration of corridor construction; 5. location where sampling and analytical data used to make lead concentration level determinations are kept (e.g. a particular Caltrans project file); 6. name and phone number (including area code) of project resident engineer and project manager, 7. location where Caltrans and contractor health and safety plan and records are kept; 8. location of project special provisions (including page or section number) for soil excavation, transportation, stockpile, burial and placement of cover material; 9. location of project drawings (including drawing page number) for soil excavation, burial and placement of cover in plan and cross section (for example, "The project plans are located at the resident engineer's office located at 5th and Main Streets, City of Fresno, See pages xxxxx of contract xxxx") 1' E 10. updated information if a Caltrans project within the corridor is added, changed or deleted; and 11. type of environmental document prepared for each project, date of adoption, document title, Clearing House number and where the document is available for review. A copy of the Caltrans Categorical Exemption, Categorical Exclusion Form, or if filed, the Notice of Exemption for any project shall be submitted to the DTSC Headquarters Project Manager. v) Changes in location of lead-contaminated soil placement, quantities or protection measures (field changes) shall be noted in the resident engineer's project log within five (5) days of the field change. w) Caltrans shall ensure that field changes are in compliance with the requirements of this variance. x) Operational procedures described in the California Environmental Quality Act (CEQA) Special Initial Study shall be followed by Caltrans for activities conducted i under this variance. I y) Caltrans shall implement appropriate health and safety procedures to protect its employees and the public, and to prevent or minimize exposure to potentially hazardous wastes. A project-specific health and safety plan must be prepared and implemented. The monitoring and exposure standards shall be based on construction standards for exposure to lead in California Code of Regulations, title 8, section 1532.1. z) Caltrans shall provide a district Coordinator for this variance. This Coordinator will be the primary point of contact for information flowing to, or received from, DTSC regarding any matter or submission under this variance. Caltrans shall promptly notify DTSC of the name of Coordinator and any change in the Coordinator. aa) Caltrans shall conduct regular inspections, consistent with Caltrans' Maintenance Division's current Pavement Inspection and Slope Inspection programs, of the locations where lead-contaminated soil has been buried and/or covered pursuant to this variance. If site inspection reveals deterioration of cover so that conditions in the variance are not met, Caltrans shall repair or replace the cover. -7- i bb) Caltrans shall develop and implement a record keeping mechanisms to record and retain permanent records of all locations where lead-contaminated soil has been buried per this variance. The records shall be made available to DTSC. cc) If areas subject to the terms of this variance are sold, relinquished or abandoned (including roadways), all future property owners shall be notified in writing in advance by Caltrans of the requirements of this variance, and Caltrans shall provide the owner with a copy of the variance. A copy of such a notice shall be sent to DTSC and contain the corridor location and project. Caltrans shall also disclose to DTSC and the new owner the location of areas where lead-contaminated soil has been buried. Future property owners shall be subject to the same requirements as Caltrans. dd) For the purposes of informing the public about instances where the variance is implemented, Caltrans shall: i 1. maintain current fact sheets at all Caltrans resident engineer offices and the Caltrans District office. Caltrans shall make the fact sheets available to anyone expressing an interest in variance-related work. 2. maintain a binder(s) containing copies of all reports submitted to DTSC at the District office. Caltrans shall ensure that the binders are readily accessible to the public. 3. carry out the following actions when it identifies additional projects: (A) notify the public via a display advertisement in a newspaper of general circulation in that area. (B) update and distribute the fact sheet to the mailing list and repository locations. ee) Lead-contaminated soil may be buried only in areas where access is limited or where lead-contaminated soil is covered and contained by a pavement structure. ff) Dust containing lead-contaminated soil must be controlled. Water or dust palliative may be applied to control dust. If visible dust migration occurs, all excavation, stockpiling and truck loading and burying must be stopped. The granting of this variance confers no relief on Caltrans from compliance with the laws, regulations and requirements enforced by any local air district or the California Air Resources Board. gg) Sampling and analysis is required to show the lead-contaminated soil meets the variance criteria. All sampling and analysis must be conducted in accordance with the appropriate methods specified in U.S. EPA SW-846. i i I hh) DTSC retains the right to require Caltrans or any future owner to remove, and properly dispose of, lead-contaminated soil in the event DTSC determines it is necessary for protection of public health, safety or the environment. ii) DTSC finds that some projects involving lead-contaminated soil are joint projects between Caltrans and other government entities. In these joint projects, Caltrans may not be the lead agency implementing the project although Caltrans is still involved if the project occurs on its right-of-way. Caltrans may invoke this variance for joint projects where Caltrans and local government entity are involved provided that 1) the project is within the Caltrans Right-of-Way; 2) Caltrans reviews/oversees all phases of the project including design, contracting, environmental assessment, construction, operation, and maintenance- and 3) Caltrans oversees the project to verify all variance conditions are complied with. Caltrans will be fully responsible for the variance notification and implementation in these joint projects. jj) All correspondence shall be directed to the following office: Hazardous Waste Permitting Department of Toxic Substances Control 8800 Cal Center Drive Sacramento, CA 95826 Attn: Caltrans Lead Variance Notification Unit 10. DISCLAIMER. a) The issuance of this variance does not relieve Caltrans of the responsibility for i compliance with Health and Safety Code, chapter 6.5, or the regulations adopted thereunder, and any other laws and regulations other than those specifically identified in Section 8 of this variance. Caltrans is subject to all terms and conditions herein. The granting of this variance confers no relief from compliance with any federal, State or local requirements other than those specifically provided herein. b) The issuance of this variance does not release Caltrans from any liability associated with the handling of hazardous waste, except as specifically provided herein and subject to all terms and conditions of this variance. 11. VARIANCE MODIFICATION OR REVOCATION. This variance is subject to review at the discretion of DTSC and may be modified or revoked by DTSC upon change of ownership and at any other time pursuant to Health and Safety Code, section 25143. 12. CEQA DETERMINATION. DTSC adopted a Negative Declaration on June 30, 2009. Approved: Date Beverly Rikal Operating F cilities Team Department of Toxic Substances Control I I i i I I -10- APPENDIX September 02, 2009 b Gemma Reblando ELAP No.: 1838 Geocon Consultants, Inc. NELAP No.:02107CA 3160 Gold Valley Drive, Suite 800 NEVADA.:CA-401 Rancho Cordova, CA 95742 CSDLAC No.: 10196 TEL: (916)852-9118 FAX: (916) 852-9132 Workorder No.: 107096 RE: Hwy 89 Truckee Mousehole, S9300-06-82 Attention: Gemma Reblando Enclosed are the results for sample(s) received on August 26, 2009 by Advanced Technology Laboratories . The sample(s) are tested for the parameters as indicated in the enclosed chain of custody in accordance with the applicable laboratory certifications. Thank you for the opportunity to service the needs of your company. Please feel free to call me at (562)989-4045 if I can be of further assistance to your company. Sincerely, _�AL_ Eddie F. Rodriguez Laboratory Director The cover letter and the case narrative are an integral part of this analytical report and cannot be reproduced in part or in its entirety without written permission from the client and Advanced Technology Laboratories. ech Advanced Technology�Advanced of �y 3275 Walnut Avenue Signal Hill, CA 90755 Tel: 562 989-4045 Fax: 562 989-4040 Laboratories 1 of 15 Advanced Technology Laboratories Date: 02-Sep-09 CLIENT: Geocon Consultants,Inc. Project: Hwy 89 Truckee Mousehole,59300-06-82 CASE NARRATIVE Lab Order: 107096 Analytical Comments for Method 6010 RPD for Duplicate(DUP)is outside criteria for samples 107096-006ADUP, 107096-016ADUP, 107096-026ADUP, 107119-002ADUP and 107120-00 1 ADUP; however, the Laboratory Control Sample(LCS)validated the analytical batch. Page 1 of 1 Advanced T c lase logo, Laboratories tories l 75' Waalnuf AaraLLnue, Signal fill, (A W55 Tel. 561 989 4045 ax .56 1 989 4040 IOW 2of15 Advanced Technology Laboratories Date: 9/2/2009 LEAD BY ICP ANALYTICAL RESULTS EPA 6010B CLIENT: Geocon Consultants,Inc. Lab Order: 107096 Project: Hwy 89 Truckee Mousehole,59300-06-82 Date Received 8/26/2009 8:30:00 AM Project No: Matrix: Soil Analyte: Lead Analyst: SRB Laboratory Client Sample Results Units QC Batch PQL DF Date Date ID ID Collected Analyzed 107096-OOIA HSI-0 18 mg/Kg 57782 5.0 1 8/24/2009 9/1/2009 107096-002A HSI-1 16 mg/Kg 57782 5.0 1 8/24/2009 9/1/2009 107096-003A HS 1-2 15 mg/Kg 57782 5.0 1 8/24/2009 9/1/2009 107096-004A HS2-0 10 mg/Kg 57782 5.0 1 8/24/2009 9/1/2009 107096-005A HS2-1 7.0 mg/Kg 57782 5.0 1 8/24/2009 9/1/2009 107096-006A HS3-0 6.3 mg/Kg 57782 5.0 1 8/24/2009 9/1/2009 107096-007A HS3-1 ND mg/Kg 57782 5.0 1 8/24/2009 9/1/2009 107096-008A HS3-2 ND mg/Kg 57782 5.0 1 8/24/2009 9/1/2009 107096-009A HS4-0 15 mg/Kg 57782 5.0 1 8/24/2009 9/1/2009 107096-OIOA HS4-1 32 mg/Kg 57782 5.0 1 8/24/2009 9/1/2009 107096-OIIA HS4-2 32 mg/Kg 57782 5.0 1 8/24/2009 9/1/2009 107096-012A HS5-0 11 mg/Kg 57782 5.0 1 8/24/2009 9/1/2009 107096-013A HS5-1 8.4 mg/Kg 57782 5.0 1 8/24/2009 9/1/2009 107096-014A HS5-2 ND mg/Kg 57782 5.0 1 8/24/2009 9/1/2009 107096-015A HS6-0 9.0 mg/Kg 57782 5.0 1 8/24/2009 9/1/2009 107096-016A HS6-1 5.5 mg/Kg 57782 5.0 1 8/24/2009 9/1/2009 107096-017A HS7-0 17 mg/Kg 57783 5.0 1 8/24/2009 9/1/2009 107096-018A HS7-1 21 mg/Kg 57783 5.0 1 8/24/2009 9/1/2009 Qualifiers: B Analyte detected in the associated Method Blank E Value above quantitation range H Holding times for preparation or analysis exceeded ND Not Detected at the Reporting Limit S Spike/Surrogate outside of limits due to matrix interference Results are wet unless otherwise specified DO Surrogate Diluted Out Advanced T c brae logo, l a La borarluries l 75' W alma AaraLLnue, .Vigra f Ifill, t A 9025.5 Tel. 561 989 4045 ax .56 1 989 4040 3of15 Advanced Technology Laboratories Date: 9/2/2009 LEAD BY ICP ANALYTICAL RESULTS EPA 6010B CLIENT: Geocon Consultants,Inc. Lab Order: 107096 Project: Hwy 89 Truckee Mousehole,S9300-06-82 Date Received 8/26/2009 8:30:00 AM Project No: Matrix: Soil Analyte: Lead Analyst: SRB Laboratory Client Sample Results Units QC Batch PQL DF Date Date ID ID Collected Analyzed 107096-019A HS8-0 9.4 mg/Kg 57783 5.0 1 8/24/2009 9/1/2009 107096-020A HS8-1 10 mg/Kg 57783 5.0 1 8/24/2009 9/1/2009 107096-021A HS8-2 ND mg/Kg 57783 5.0 1 8/24/2009 9/1/2009 107096-022A HS9-0 51 mg/Kg 57783 5.0 1 8/24/2009 9/1/2009 107096-023A HS9-1 6.0 mg/Kg 57783 5.0 1 8/24/2009 9/1/2009 107096-024A HN10-0 52 mg/Kg 57783 5.0 1 8/24/2009 9/1/2009 107096-025A HN10-1 6.6 mg/Kg 57783 5.0 1 8/24/2009 9/1/2009 107096-026A HN11-0 5.1 mg/Kg 57783 5.0 1 8/24/2009 9/1/2009 107096-027A HN11-1 5.6 mg/Kg 57783 5.0 1 8/24/2009 9/1/2009 107096-028A HN 11-2 ND mg/Kg 57783 5.0 1 8/24/2009 9/1/2009 107096-029A HN12-0 ND mg/Kg 57783 5.0 1 8/24/2009 9/1/2009 107096-030A HN12-1 ND mg/Kg 57783 5.0 1 8/24/2009 9/1/2009 107096-031A HN13-0 ND mg/Kg 57783 5.0 1 8/24/2009 9/1/2009 107096-032A HN13-1 ND mg/Kg 57783 5.0 1 8/24/2009 9/1/2009 107096-033A HN14-0 32 mg/Kg 57783 5.0 1 8/24/2009 9/1/2009 107096-034A HN 14-1 11 mg/Kg 57783 5.0 1 8/24/2009 9/1/2009 107096-035A HN15-0 7.0 mg/Kg 57783 5.0 1 8/24/2009 9/1/2009 107096-036A HN15-1 7.4 mg/Kg 57783 5.0 1 8/24/2009 9/1/2009 Qualifiers: B Analyte detected in the associated Method Blank E Value above quantitation range H Holding times for preparation or analysis exceeded ND Not Detected at the Reporting Limit S Spike/Surrogate outside of limits due to matrix interference Results are wet unless otherwise specified DO Surrogate Diluted Out Advanced T c brae logo, l a La borarluries l 75' W alma AaraLLnue, .Vigra f Ifill, t A 9025.5 Tel. 561 989 4045 ax .56 1 989 4040 4of15 Advanced Technology Laboratories Date: 9/2/2009 LEAD BY ICP ANALYTICAL RESULTS EPA 6010B CLIENT: Geocon Consultants,Inc. Lab Order: 107096 Project: Hwy 89 Truckee Mousehole,S9300-06-82 Date Received 8/26/2009 8:30:00 AM Project No: Matrix: Soil Analyte: Lead Analyst: SRB Laboratory Client Sample Results Units QC Batch PQL DF Date Date ID ID Collected Analyzed 107096-037A HN15-2 7.1 mg/Kg 57784 5.0 1 8/24/2009 9/1/2009 107096-038A HN16-0 10 mg/Kg 57784 5.0 1 8/24/2009 9/1/2009 107096-039A HN16-1 15 mg/Kg 57784 5.0 1 8/24/2009 9/1/2009 107096-040A HN17-0 7.4 mg/Kg 57784 5.0 1 8/24/2009 9/1/2009 107096-041A HN17-1 ND mg/Kg 57784 5.0 1 8/24/2009 9/1/2009 107096-042A HN17-2 27 mg/Kg 57784 5.0 1 8/24/2009 9/1/2009 107096-043A HN18-0 ND mg/Kg 57784 5.0 1 8/24/2009 9/1/2009 107096-044A HN18-1 ND mg/Kg 57784 5.0 1 8/24/2009 9/1/2009 107096-048A HN13-2 ND mg/Kg 57784 5.0 1 8/24/2009 9/1/2009 Qualifiers: B Analyte detected in the associated Method Blank E Value above quantitation range H Holding times for preparation or analysis exceeded ND Not Detected at the Reporting Limit S Spike/Surrogate outside of limits due to matrix interference Results are wet unless otherwise specified DO Surrogate Diluted Out Advanced T c brae logo, l a La borarluries l 75' W alma AaraLLnue, .Vigra f Ifill, t A 9025.5 Tel. 561 989 4045 ax .56 1 989 4040 5of15 Advanced Technology Laboratories Date: 9/2/2009 pH ANALYTICAL RESULTS EPA 90450 CLIENT: Geocon Consultants,Inc. Lab Order: 107096 Project: Hwy 89 Truckee Mousehole,59300-06-82 Date Received 8/26/2009 8:30:00 AM Project No: Matrix: Soil Analyte: pH Analyst: DDL Laboratory Client Sample Results Units QC Batch PQL DF Date Date ID ID Collected Analyzed 107096-OOIA HSI-0 7.9 pH Units R112435 0.10 1 8/24/2009 9/1/2009 107096-017A HS7-0 7.7 pH Units R112435 0.10 1 8/24/2009 9/1/2009 Qualifiers: B Analyte detected in the associated Method Blank E Value above quantitation range H Holding times for preparation or analysis exceeded ND Not Detected at the Reporting Limit S Spike/Surrogate outside of limits due to matrix interference Results are wet unless otherwise specified DO Surrogate Diluted Out Advanced T c brae logo, l a La borarluries l 75' W alma AaraLLnue, .Vigra f Ifill, t A 9025.5 Tel. 561 989 4045 ax .56 1 989 4040 6of15 ANALYTICAL RESULTS Advanced Technology Laboratories Print Date: 02-Sep-09 CLIENT: Geocon Consultants,Inc. Lab Order: 107096 Project: Hwy 89 Truckee Mousehole,S9300-06-82 Lab ID: 107096-045 Collection Date: 8/24/2009 Client Sample ID: Tunnel PC Matrix: PAINT CHIP Analyses Result PQL Qual Units DF Date Analyzed ICP METALS EPA 30508 EPA 60108 RunlD: ICP6_090902A QC Batch: 57803 PrepDate: 8/31/2009 Analyst: CL Lead 2.6 2.0 mg/Kg 1 9/2/2009 10:05 AM Lab ID: 107096-046 Collection Date: 8/24/2009 Client Sample ID: YPC Matrix: PAINT CHIP Analyses Result PQL Qual Units DF Date Analyzed ICP METALS EPA 30508 EPA 60108 RunlD: ICP6_090902A QC Batch: 57803 PrepDate: 8/31/2009 Analyst: CL Lead ND 4.0 mg/Kg 1 9/2/2009 10:05 AM Lab ID: 107096-047 Collection Date: 8/24/2009 Client Sample ID: WPC Matrix: PAINT CHIP Analyses Result PQL Qual Units DF Date Analyzed ICP METALS EPA 30508 EPA 60108 RunlD: ICP6_090902A QC Batch: 57803 PrepDate: 8/31/2009 Analyst: CL Lead ND 8.0 mg/Kg 1 9/2/2009 10:06 AM Qualifiers: B Analyte detected in the associated Method Blank E Value above quantitation range H Holding times for preparation or analysis exceeded ND Not Detected at the Reporting Limit S Spike/Surrogate outside of limits due to matrix interference Results are wet unless otherwise specified DO Surrogate Diluted Out Advanced T'eclrrae logo, C-40 Laboratories tor-ies l 75' Waalnuf AaraLLnue, Signal fill, (A W55 Tel. 561 989 4045 ax .56 1 989 4040 7of15 L (O (O (O (O (O U O w w ww w ^^ o 1� r 1� cC O O r r 0 r r 0 r r D l(7 r r 0 r r 0 N d d d d d LD A Z Z o Z Z o Z Z o Z Z o Z Z o C C C C C O �I of U of U Of U of U of U � O i r� > > > N > � F o � o ao o ao o ao o ao o ao :a _ o o _ o o _ T 1 N N � N N � N 0 x cn r OD Qi L OD Qi L OD Qi L OD Qi L OD Qi Lcn D D .J 0 0 "' p D D "' 0 0 "' CO D D .J CO C 0 0_ 0 CO 0_ 0 0_ (n E c') Q (n c') a a 0 a ? 0 a ? 0 a ? 0 a ? 0 � J J J J J Q Q Q Q Q U U U U O U C,W W p W W W to ^ri Of Of Of Of Of � 7 h. m m m m m E o E o o E o — E o M E o M o O N M > N M > N M > N M > N M > � o i 0O w W Y W Y W Y W Y W Y n U U U U U OD N OD N O OD N OD N O CD N O O Cl) O W O Cl) O Uc Cl) O LD (D (6 ( (D (6 O ( (D (6 ( (D (6 N ( (D (0 04ctl CD Q > o Q > LD O Q > O Q > O Q > ° o d Y o d Y o d Y o d Y o d Y ' fD W d (D W d (D W d (D W d (D W 0- U) U U U U U ai o 6 o 6 o 6 o ai o z 70 z 70 z 70 z z 0 0 0 0 0 w U J O U N J O U J O U J O U N J O DD OZz O ICI O G N Y M LD � M cp M C M LD M � ' '1 •rl N J O N Z O (n N d O (n N O N p m � V � O ^ I� ^ � ^ CV O R7 J R7 LO p R7 �2 RJ O m2 . O s. CL CL CL CL CL CL to „..: U U U U U u; a. O d co co o y O O a00p Q Q Q -� N N N U O o o ° � O O pp O O O O N r a N N N °yctn N N N o h o N o N o N ° y d J J N N N Z 0 0 0 0 0 0 0 0 0 0 z o CW CL U a U U Q J (n U Q J (n U Q J (n U Q J (n U Q J C L (O (O (O (O (O U O^ w w w w w O k iC � k �..f..� O ) a O 1r-_ a O OD a N O N �IW7 00 W7 OD a O ) N �I � N �I7 � N �I7 � �I7 � � �I7 r-_ r-_ � N � r � r r.- r r.- O r r.- r r.- � O r r d r r d r r d r r r d r r d O O O O O af O O O Of O O of CA z z o z z o z z o z z o z z o 7 a) f a) f a) f a) f O O O O a3 9 7 > > > M > >ofof 4p O to 0 0 0of of - o ao O ao O ao O ao O ao a 0 0 _ O O _ O O _ O O _ O O _ T 1 N N E � N N E � N E J M r J M r J M J r OD Qi L OD Qi L OD Qi L OD Qi L OD p D D "' 0 0 "' M Q cn Q cn CO Q cn Q cn M Q cn a a 3 a 3 a 3 a 3 a 3 � J m� J m� J m� J m� J Q Q Q Q Q U U U U U LU w w w w •� of of rn of � 00of ^ri Of Of Of Of Of � 7 h. Of O Of O Of O Of O Of O to E o m E o m o E o m E o m v E o m — M > M > M > M > M M > �, U .N. w w w L O w Q a) Q a) Q a) Q D a of a of a of a 0-1 a of W Y D W Y D W Y D W Y D W Y n (n (n (n (n U) mO m O m O m O CL a o a a o a O =3W o 2 o W o 2 W O =3o W o =3 �O o to m to m L to m to m L to m o Ca O Q > O Q > N O Q > O Q > N O Q CD d Y o d Y o d Y o d Y o d Y ' m W a m W a m W a m W a m W 0- U) . U UU U U U N O N o N o N o N o 00 0 0 o w cc ', U J O U a) J O U N J O U N J O U a) J O m H C7 m H C7 �j m H C7 �c m H C7 �j m H C7 0 o 0 M L � 44 .gym Y N 7 N 7 V N 7 (.0 N 7 Y N 7 W cC Gia dj J OD V1 z a0 V1 d a0 V1 CO OD V1 O J a0 V1 m � � m ^ O V a) r ^ a) C) ^ a) m 1` a) 'O Uof 04 04CL CL CL CL CL �i >+ >+ ^O ter". Q U Q U Q U Q U Q U JJZ E E m m a5 a5 a5 m _ N m m m <'w CL co 00 y p � �r.. 00O O N O OD O O OD44 �J co O O O9 co co O y a J J S S a d z v �s Zu a) (D ( (D ( (D ( (D a) a) m z o r�1 Q Q aQ a Q a Q U a (n U Q J (n U Q J (n U Q J (n U Q J (n U Q J C L (O (O (O U O w w w W O k O 00 k �C w a a a Co. r 1� 0 r 1� 0 O 7 a a (.0 -O F+ O �I O O N O O O O p O Z Z o Z Z o Z Z o �' OI of i� of i� of i� � o M N fl > > > 04 4p a0i ^� N U( N N N CD CD a e» 0 0 0 0 0 0 :+- O � � N E � 00 00 00 co D D .J M O_ (n O_ N M O_ N E M a a 3 a ? 3 a ? 3 Q J Q J Q J U U r U LU w w 06 6 ^ri � 7 h Of Of Of LO � u� LS � O uS O a3 a5 M M > M > :N Q a) .N Q a) U( :N Q a) U( O i O O ao a o a � D W Y D W Y D W (n (n U) CL a o a o (o m (o m LD (o m LD O Q > O Q > N O Q > N m W mW 0 m W 0- I:a cC U N O N O N O Z Z Z _0 O O O W U J O U J O U a) J O 00 O O ICI O M L � 44LD .gym _ G N d 00 N V 00 (n CO 00 V1 C—,) m x N r.- 0 �I7 ^2 r.17 O ^2 r.17 O04 04 (a .0 CL CL CL a3 a5 a5 to N a3 U a5 . (n (n (n CL a co co y O p 00 D ... a i. co i. co i. co c o �s w Q a Q Q 5 E (D E (D U a M U Q J (n U Q J M U Q J C L (O (O (O (O (O U O^ w w w w w O k iC � X17 � X17 � X17 � X17 � X17 J, y0 O O O O O N O O Of O O of CA z z o z z o z z o z z o z z o 7 a) f a) f a) f a) f i 0- 75 a5O 75 75 U( 3 a) a � o 0 of of 0 0 0 - a o o o o o O -0 o ao o ao o ao o CD a 0 0 _ o o _ o o _ T 1 N N E � N E N N N E J M r J M r J M J r OD Qi L OD Qi L OD Qi L OD Qi L OD p D D "' 0 0 "' M Q cn Q cn CO Q cn Q cn M Q cn 'N J a a 3 a ? 3 a ? 3 a ? 3 a ? 3 0 J � J � J � J � J Q Q Q Q Q U U � U U Co U LU w w w w ^ri � 7 h Of Of Of Of Of LO O mE O m O E O m E O ma) O m o O M > M > M > M > 0O M .N. Q w Q w Q w Q LO a) � a) � a) � a) Q a) CL of CL of CL of CL 0-1 CL of D W Y D W Y D W Y D W Y D W Y n (n (n (n (n U) mO m O m O m O CL a o a a o a O =3 W o o Wo W O � o W o =3 �O o to m to m L to m to m L to m o Ca O Q > O Q > N O Q > O Q > N O Q o d Yo d Y o d Y o dY o d Y ' m W a m W a m W a m W a m W 0- U) . U UU U U U N O N o N o N o N o 0 z z z z z 0 0 0 0 o w U J O U a) J O U N J O U N J O U a) J O n H C7 n H C7 �j n H C7 �c n H C7 �j n H C7 0 o 0 M L � 44 .gym Y M M � LD M � M � ON Y M =3 dj J OD V1 z 00 V1 CO d 00 V1 V OD V1 O J CO (n Z CO . m ^ O V O C'M a) C) ^ a) 1� � Cfl V 1� "o �I7 J X17 V o u� u� Of O U NCL CL CL CL CL as >+ >+ ^O ter". Q U Q U Q U Q U Q U JJZ a5 a5 a5 a5 a5 cn ^C" _ N E m E m E m E m E <'w CL co 00 y p � �r.. 00N N M O OD O O OD44 t, .� �i � O r O r r OL Fw fA fA r.- z ^ z m O A y a J J S S a d z v �s r�1 Q a Q a Q a Q Q ao o E as as E 5 E as E (D m m U a (n U Q J (n U Q J (n U Q J (n U Q J (n U Q J C L (O (O (O U O w w w W � k 1� OD 0 Qi 0 k �C w a a a N f�D N X17 � X17 X17 J, y0 N 1� N 1.- 0 O r 1.- 0 r 1.- 0 CO � 7 F+ y �I O O O O � Cl? O CA Z Z o Z Z o Z Z o p OI of i� of i� of i� � o N F O fl > M > > 04 4p 0 a e» o a� O o a� a 0 0 0 0 0 0 N O +- N O +- CD +-f N N NN N E NN oo oo oo co D D "' M O_ N O_ (n M O_ (n E M a a 3 a ? 3 a ? 3 Q J Q J Q J U U U LU w w 0 o r o r ^ri � 7 h Of Of Of LO u� LS u� O a3 � a5 N � O 75 N LD CO co Q N Q N r '_' Q N CL of a of a of D lL Y D lL Y D lL Y U) U) U) 7 U mO CL (1) a o a o (o m (o m LD (o m LD O Q > O Q > N O Q > N 0CL CL CL m W IL m W IL m W � I:a cC U N O N O N O Z 70 Z Z 70 O O O U J O U J O U (1) J O Zz O O ICI O M L � 44 .gym (n �O M 7 O M (n O m a dj CL OD V1 O 00 V1 O 00 V1 mi 0 �I7 ^2 r.17 O04 04 .0 a3a3 U a5 a5 a5 bD _ N E m m m m N . (n (n (n CL a co co y O p 00 D ... a cn ,n cn ,n cn ,n Z ^ Z ^Z c o Z (D (D (Da) a) a) z w Q Q a Q E E E (D mE U a M U Q J U) U Q J M Q U J C L (O (O (O (O (O U O^ w w w w w O k I� O ^ O O k 00 d 00 d 00 N d 00 N d 00 N d O F N 1� N r-_ N r-_ N r-_ N 1` r-_ r-_ �I7 �I7 �I7 J, y0 � N � r � r r.- r r.- O r r.- r � � � O r r d r r d r r d r r d r r d O O O O O M O O z z o z z o z z o z z o z z o �I of (n f� (n f� (n f� (n f� (n � O i 0- 75 a5 W 73 75 > > > N > > y� O N N N bD - a o ao O 0n O 0n O 0n O 0n a 0 0 _ o o _ o o _ o o _ o o _ T 1 N N N N E N E N J M r J M J r 00 Qi L 00 Qi L 00 Qi L 00 Qi L 00 O D D "' 0 0 "' M Q cn Q cn CO Q cn Q cn M Q cn 'N J a) 'N J 0- J m J m J m J m J Q Q Q Q Q U U N U U O U W W O W W W ^ri � 7 h Of Of Of Of Of LO a� O o to _ u� LS M m E M m o E M E M m ao E M as O > > > > > c Q N Q N Q N Q N N Q N D lL Y D lL Y D lL Y D lL Y D lL Y n (n (n (n (n U) mO m O m O m O CL a o a a o a O =3 W o o Wo W O � o W o =3o to m to m L to m to m L to m o a O Q > O Q > N O Q > O Q > N O Q o dY o d Y o d Y o d m d W o Y ' m W 0- U) . U UU U U U N O N o N o N o N o 0 z z z z z 0 0 0 0 o w U J O U a) J O U N J O U N J O U a) J O n H C7 n H C7 �j n H C7 �c n H C7 �j n H C7 0 o 0 M L � 44 .gym Y v v � 00 v � C v � m Y v � a dj J W V1 z W V1 d W V1 O W N N J 00 (n Z CO . m ^ O V O V a) V ^ aC) ) 1� u7 J u� N D u7 u� O u� �. 04 Q 0 Q 0 Q 0 Q 0 Q 0 a a a a a Q U Q U Q U Q U Q U JJZ a5 a5 a5 a5 a5 cn ^C" _ N E m E m E m E m E <'w CL p co 00 y p � C7 0 v 00 -e 00 ^ 0 0 00 1. 1. O N O N N N� y m m U U o N o N m m Q Z y d J J r N r N d Z (D (D a) a) a) a) (D (D (D (Dw CL CL 51 m z o ao oE Q@as m as � as � as � as U a (n U Q J (n U Q J (n U Q J (n U Q J (n U Q J C L (O (O (O U O w w w W � k � N k cC �..f..� d d d � N � N N trn � trn trn J, y0 N � N r.- 0 O r r.- 0 r r.- 0 W � 7 O O O O O N Z Z o Z Z o Z Z o �' OI of i� of i� of i� � o (6 N t6 t6 (q O.. r� > M > > 4p a°i N a e» 0 0 0 0 0 0 . +- ° N N E ON N E ON x C/� M J M J M J o o s o CO D D .J CO O_ N O_ (n M O_ N E M Q J Q J Q J LU LU LU U U U ^ri � 7 h Qf Qf Qf LO � u� LS Ou (6 � O (6 (V � (6 (V ty > M > M M > M U D ao a o a � W Y D W Y D W U) to to mO CL (1) a o a o o m o m LD o m LD O Q > O Q > N O Q > N too CL W too W 0- (9)CD W 0- I:a cC U N O N O N O 0 O O Z Z Z O W U J O U J O U N J O O L(7 (A O L(7 O L(7 Zz O O ICI O C CL 00 r W (.0Q 00 N N m 0 trn ^2 trn O ^2 trn O L 'a N s. CL CL CL CL CL CL m m m un _ N E m E m E ()(n (n (n CL a co co y O p 00 D ... N N N N N N $ °' N N N ° s o N o N o N ° N N N d Z v �s Z U N N N N N (D Z tU Q >+ O_ . U a (n U Q J to U Q J (n U Q J C L (O U CNS ��7-vv L V U O6 O � C � k M 00 a X17 T O Z Z o �I a > o U ° � F o a � � J Q N (D 'N J a ? 0 � J Q U LU • � 7 h C LO un CL O i o o LO D 7 U V U) ri' a d ami lL d U U N O 0 0 W pip d O O 44 O ICI O M L N O CO a� a � N m . Q o Q JZ to U) u.".• CC 7 CL O 00 o N ° cn ( p (D y m Z p x w TAp U U Q Q C c) c5 c2 W �r C6 C, C) �o z U C\j N 4-4 L0 Lr) in 0 1:5 0 >- cq cx� NO 1 IVA�J 3 S]'d d C) o 0 U) C) w ......... ............................................ ........ z T CL Of n 4 0 c6 E z N IL to (o 0 1) C) < V) 0 X a) �E W F, a>m) LLI LL CD IL z or U) (D < a. C) > (L x E < < 0 LU co m m E cD a) Q LU C/) 0 N C: 00 0 I c < LL LU a) 0 Lij 0 wc w C) (f) a. .0 c- 0 "�5 0 C6 co 0 2 E0 'Fu 4161, a) (D E z z z 6 cn _0 Z - m :E o- m I I I I co 0 co 0 N of 0 0 sops 11 Z zl- EEyd w 11 0 z C) rr 'E 00 LU < 'z FA 01, D LU U) Z LLJ /0� < z 0 U-1 0 T C:) 0 N m CD 0 < 00 m U) z w < o 0 0 U) SS/09 co , 2i cu > U) 0 a) 0 00 a) LL CX > m E it -0 - -j 0 w > (D -S'E) 0 (1) -0 < Alb� 'o IT o > -2 o LL 0 0 0) -2 -6 0 0 ID -60 (D E�* < < cn In uax 0 C) u 0 J�J 9s 11Z > 0 W < Qb (D kXlw N 2a) > ) Q) (D 0 '2 m E 0 00 0 < <-5iT cn _0 H 0 o < > Cl) 11 m w m o > U) � < 0 U) co a_ CA 0 CL '9 0 E (D m a) U O VI C i3 0 C/) 0 0 C:) CD < A ,-! z co O II U) C) 41 0N I— (D Q� 0 C,C) "a E 0 ca U) 4 0 00c ar4 E 0 x 0 2 1 1 1 U) < a) -6 4z) m = I E 'a ; — -( Z w 0 -0 O M, az) z o ff . M,9 1 '1 z z -q - U w -0 E 0 0 11 cd 7p Z 'T m 2 'f 11 r J, 0 < 'R oo rn 0 a a mz 0 L: o-2 -a i� 0 2 uj (n a) -D Ill LU �2 D Co E Mu IWD—0 o cE E a) , . u �] 'J, > 4 F� < Ec To CL 0 < -1 < — 0-o Q a) 0 E m o w Z 7; C) -�- 0 y� E 'a w Z (D W" Z a) U- o .0 0 m 0) co 0� (K--L Ej L Er.,2 C\l z z z �2 — 11 � w" a LLJ CO L) Ill C) 67 cy> (D F-w cr 4-4 bi a (n 0 0 I R N 0 11 V A J 3 S I'd d C) m 0) Q v It o U) U) 0 LUro C) CL ............... z CL S; 0 E E B 06m 0- c 0 0 (0) >a)V) T- �Z q (0 M it w LL a) W = z -S� U) cu > E < (L or: Fn E C:> 0) U) LU C: co T < LL w C) - N Lu 0 IX u 2 it 0 a_ T- N C\j t U)0 E 2 0 c) Lol)) C- E z z z ID -Fu to m -o Z bM at 0 Va) -0 11 ) 0 0 Fl 0 a 1a U) ca 0 >- N .L:I- 0 or z E LU 11 E 0 n. ro 0- C) .2- v LLI < Q Z Z, Z, 0 a. z N w U) Z Lli e W -L At- > < z < III o T C) 0 CD E p co 16 . 0 6, z U) 21 Q) < b3 0 0 co U) a.) a) < > Cl) r) 00 > x Of Q� CC, L >, E 8 T 5- a) -j < 0 W ID (P > M 0 -0 — co U) 0 0 Ul) 0 >m 0-2 0 0 0 0 V4 -04, dZg C) C,, CD (D E C) -0 �5 < cl, < C4 2 0 C) 0 E < 0 a 1– �D1Q, LLJ W IN, > N X -j CO 0-2 0.2 0 o < < 00 wZ U) 0 C) C) < m > W m o > to � Cf) a) < U) N M U. m 2a) 0 IL CD a) -a �Q z n_ 0 E Q) co u Cf) 0 U VI "T z < C7, oo ui .0 CD 0w E0 U) F- Cj c-k > U) U 0 < (D r E O z .Q 0 IMI'it, [L ci r,3 0 In - 2 z �c; ( 8 w L) LA V tf 0 z ry 0 '0 3,- Ir V) oo o < C) % =0 o OD W CL -a 0 w Lo L (D 2E j E Cc) 0 6 w Lli < 0 > Q z it C; < 0 (1) -0 < D-, < = Z "'L -- co fD o N w W L) ------- 0 U—) U) o ZD M _j Lu 0 0 0 ,� 0) -2 :5; (D U- .5 .5aE 0 . - o 0 g - w m., V) X E -9'oa) ' 0 � I M (D - V) Cl) LL? L � 0 6 CC dCO it z z z �2 �2 _0 W I m Z 0 0 0 11-N M . Eli z rn 0) 114 cl� , �i 6 (D 11 El El - Nn EN. E E R en I 0 0 0 > > CC) C� F-- 1-- 1-- uj m(6 co .0 N 0 11 V A 3 S 3 d C) m 0- o 0 U) w C) a) a ......... ............. . ....... z CD- c6 E -2 F- C) n z PCd 0 0 MII . U- LOCD ID < C- Z A U) b > & 0� 0 IL 0 < 0- LLJ LU m E (D U) 0 N :DQ C) LL 2 < LL w ❑0 0—— o c LU 0 (D D- :E o w w co fh 0 U F= U) 2 C) 0 0 - X ID 0 0 El 'mo cUj E z z z 65 C5 75 ITS co 0 El 0 0 ) C3 0 g :z C) 0 LU If 0 w 0- C) cr z z z 09 < LU Cl) z 0- - N U) z z w 0 co 0 ry T C) 0 co m E bco U) W n < AtD ro " W v co s/pa to U) L < V) (D Q) 0) < > > cn 6 'DO x 0 t > L: >1 E of �SJ00 0 Lu co 0) > cu 0 Q) -0 o U) In < 0 -2 0 0 C) U- 0 > 0 M o XZ11 ID C) & 0 0 INN w (D C:) C) (D E E a) Q) 0 F- < 0 ui N > (I) a) 0 0 7P -V E ❑ Ill z 111 < < CD < 0 C) U) + 0 00 > IM I[ > In In a) < (n Q a) U- 2N Q) a_ 0 0 0 za 0 E m ca CL L: U) 0 U 0 c:> C) a a) < M z p II (D -121 N N U) Q) CD F-- 0 0 O (D (N V) - 0 :71 E IT �M�l oo w Z< 0 u) Ln 'T E V) 0 -0 z III z U) S z 4 0)M 0 no ' t2 E 0 W 0 I- c t:2 z ryCL U) 0 0 < 2 - � -2 0) b z C3, C) 00 2 L -a 0 E u) E ID t5 �i > 10 w Ill LIJ z A (D "E- I- EL 0 C6; < u 05 05 z oo P) -: -: u) Lij 0 i6 - -E , -S q ---- 0 cn -C6 0 °. 2E a- E -a) -a) (D 0 0 F- E . < cu a) 0 m I- LU 5_ aro L L z z z LLJ F- M 16� 11 \,b cn z 0 . Zr �2 0 LLI C) to 0') 0) C� C\i (4-q LO LO E E U) 0 U) - O C� lx� p p co >- >- N 0 11 VA 2A A S I 2A d �2 �R I I I I U G) o) o LU ................................. ........ ......................... 0 LID CID 1 0 >< m CdO F LL LU 0) > C) N,, < < < 0 0 ll� E < n_ m CL Ill m w E dS o (3 >- 0 C, D 0 0 M C) L) C: < LL T- N 0 Lij N 11 1) 0 0 w ( - T- .0 o o0 E V) 0 0 0 .9 D D D LMC) CL Q) E z z ra V) 0 L, 22! El El 11 c) .10 D- g 0 -ez C) CIL E E E /Ycl 0 Ill -N ce z Z, Z, uj < Lu N0- 09 LLI U) . z 1 D z 0/0 C) T L > 9) < el 0 0 0 < A) c6 0 0 co E b mC/) z w 0w U) 0 U) M 0�ca 0 0 El 0 1 6 �1� ly. < < > > 00 -a 0 co E > >1 L� >1 0 a) -j 0 W a) a) > m a — In II I- = -C - < (1) M C) LL 0 > <s S 0 0 , 1 C 0 C:) 6 b D 1 I *� c) < < < CK a) Q) 11 CL 0 CL Ln w Lli co O m y E< 0 O wz il 0 0 C:) U) F- C) < > Cl) 11 0') w .4 > U) :�i Cl) (I) C- < U) LL. b 0 tf 10 0 a 0 'a .9 -i E m a) a) U) 0 —C) �t 0 ,0 45 0 -j C> N 0) z V) U; 0) CD C) o 0 C) N ca > o E' lu x 0 m tn Lo z m . , < E E E 0 -C; 0 -J CL) W G ' m' t� E 0)CL z 0 z CD w E CL V) 0 0 15 0' L [a = 2 . E cn C;� 0 < b rn a) z — (D 7E) 4- :5 'o, Ccl M U O L: w Lli v E a) cq aw) E 0) 10 M > 0 (D 3: z E F- < < (D -0 < < 0 00 a) :3 7E t-- m q w N Ln -0 .9 3t LD -0 �o 0 0 tz 0 LL 0) E ED D� E V) I-- w 2i ug D V) C\j zr U� z z z �2 UJ 1-- CO if z 0 L) �2 l'- C) G) m = F- C\i cl� in 0 6 (4� E 0 0 0 0 0 - - of wp N 0 11 V Ad I S El 2A d U� M C) 11o 0 U) LLI Cl) m F- � o-, ........... .......... ............. z . ................. 11 R< 6 0 ——+ C,6 E t z Q- 0 o x U)0) R if cd w Z N U) > rz C) 0LU E cD Q) a) LU V) 0 N < LL Ill U) Q t E 0 w 0 M W w U) 0)o . C: 0 IL "i 0 E V) El El El U) J-7 Vi C: CL E z z z m a) Y) 0 co Cc: CL U) 0 N 2j 0 0 IL z > E E E 0 U CC W < w F� U) 0 0- z 0�/ LU V) w -100 0 > =J < z < w C) a: T LU 00 Rv 0 CD , I'D/ (D 0 E 0 N Cl) C3 b 00 , (D U-1 in co w U) 0 0 0-0 0 El 11 �>- < 0 a) ?0) ID c > U& �! U<) Q) (D 0) 03 M 0 160� > >< E O Lu > m 0 < 0 -R C) LT o >0 paJaA/I, :5 013 < 01& So 2a) 0 0 / 0 04 C:) E 0 1- co w F ~ m ¢ ¢ v ¢ � CJ a) 0 0 < D 0. N -7 (N a) E O co 0 C) C) 0 < C? < 0 0 U) 0 C) < > if U) w > :�E 6) D < 0 to a) LL V)p a) 0 CL a)'a 0m F CL CO 0 CL ' z 0 CL E cu o o vi 0- 7 U) 0 V) l FYI < C)O CL 0E r H T— r- C-) c"I m v U) 2� =3 00 U 0 E 7� ri CO f m 'o z J N EU) E 0 m 0)13- -2 t r r 0 0 E 0 C,4 z � 0 < C, 5 (D 0) E _2 a) z C) co L'i CL .9) 'o 0 !S . �3 16 U) 'j- \,- E Ill wA > M. � ,• z p ID — 1-- 0 <�E .2 M E�l OD 0 0 U) m ca 0 AM Tv 1( VVj 5D E co 4) w 0) Lli :�f z (D LL 0 m a) E Y, 15 7 F, 0) u u E If-- V%D U) W 0Q ISI 6 Z 0 C) 67 07 N K F— I� . = z C\I (N E E E cn -0 0 El 11 F1 Lo Lr) — .2 - 0 >- >- >- 0� CR I-- F- p I N 0 11 VA�J I s A d �2 �2 n- C) 0') 0') it o z 0 1 LLI a) C) Q) (D ....... ................. TC) ................. z 0 co M_ In O >< 0 LL 0 a T>)0� E - m & < C) 2 E 0 1 < < (L Q) �5 :S Lli E b a) a a LU U) 0 LL w :D _9 LL C) c < w 0 1 0 ck� 0) U.1 U) a- C) a. 0V) U E C) EU) L M10 — C z z z 'Fa V) Cf) 0 11 Ela U) C) 0- m -a 0 :;iC)- 0 z UJI 11 NE 15� 0 w z 0 C) LLJ < LLI w 10 cn w U) Z -i 9)ez > 0 z < < 111 0 0 III -i� CD T C) CD CD a) E 0 0 C). IL, 90 < 014,,o QO 00 M . 0 z U) o w 0D 0-El El El 11 -0 �Q U) Up _j m > U) C) -a -6 0 w E 'DO 0 W LL (D a) > ca q = 0 =(D - = U) < 0 as o 0 0 LL 0 > 2 < 0 -0 C) -0 0 0 0 CD C) cS E P'\ EO 'E) = 0 ns F- F- p = < < CJ ry, iii a) a) 0 E CL < A F- ca LLJ ri- 0 w N 21 Naj bi > s, 0 wE 0 z u 9 < < U) 0 0 C)% > C) < m co II U) w ro o > to V) < V) A) U- 0) 0 CL o Er 0 CL CL E (D C:) U) -0 0 a) C) < U) 01 0) (D U) (D CD 0- 0 21 F- 0 C) 2 E 0 ' z m C) Q,) ' O ODE C2 0 m - U) < Z�E E -0 0 (D 0 0)0_ -1d 0 co Z W z z C .'m '. -e "M E 4 ': C) W E =�, 0 0 -- C-11 N z C� - 0 2 CL 0 3: Co s 'S 0 ��! T 0 E V) C� 0 < 0 a) z 2 C, U 00 0 w CL 45.- >2 E t w 0 > w w z U ( E 0 D� p —0 Z < w C) c as 'r cop U) Q.- "U 7E M LD 0 co m CD m Z cc 'a) U. 0 m C' E C-) :3 -6 0 - U) co a) ID m E 0, U) ID w U) rage i or i Carmen Aguila From: Gemma Reblando [reblando@geoconinc.com] Sent: Wednesday, August 26, 2009 12:47 PM To: Carmen Aguila Cc: Diane Galvan Subject: Hwy 89 Truckee Mousehole, S9300-06-82 Hi Carmen-per my conversation with Margot, one soil sample (HN 13-2 @ 1338) was not in the chain-of-custody. Please add this sample and analyze for total lead 601013. Thanks. Gemma Reblando Project Geologist Please visit our new website at http://www.geoconinc.com Geocon Consultants, Inc. 3160 Gold Valley Drive, Suite 800 Rancho Cordova, CA 95742 916.852.9118 Tel 916.852.9132 Fax 916.396.8476 Mobile lM� CIf . w GFOTFC}INICAL - ENVIRONMENTAL - MATFRIALS San Diego _Murrieta Burbank San Bernardino Bakersfield_Sacramento Livermore Carson CityLas VegasPortland CONFIDENTIALITY NOTICE:This email may contain confidential and privileged material for the sole use of the intended recipient(s). Any review, use,distribution or disclosure by others is strictly prohibited. If you have received this communication in error,please notify the sender immediately by email and delete the message and any file attachments from your computer. Thank you. 8/26/2009 APPENDIX DESCRIPTION OF DATA SET Project Name: PLA-89 PM 21,4121.7 AND NEV-89 PM 0.010.4 Project No.: 59300-06-82 Sample Interval: 0.0 to 1.0 ft DATA SET STATISTICS Number of Valid Samples 18 Number of Distinct Samples 15 Minimum 2.5 Maximum 52 Mean 14,87222222 Median 9.7 Standard Deviation 15.0768153 Variance 227.3103595 Coefficient of Variation 1.013756725 Skewness 1,826570311 Mean of log data 2.299305156 Standard Deviation of log data 0.913650988 90%Non-parametric UCLs Standard Bootstrap UCL 19,45290435 95%Non-parametric UCLs Standard Bootstrap UCL 20,53992954 DESCRIPTION OF DATA SET Project Name: PLA-89 PM 21.4/21.7 AND NEV-89 PM 0.010.4 Project No,: 59300-06-82 Sample Interval: 1.0 to 2.0 ft DATA SET STATISTICS Number of Valid Samples 18 Number of Unique Samples 14 Minimum 15 Maximum 32 Mean 9.111111111 Median 6.8 Standard Deviation 7.744135 Variance 59.971634 Coefficient of Variation 0.849966 Skewness 1.797470 Mean of log data 1.914155 Standard Deviation of log data 0.788391 90%Non-parametric UCLs Standard Bootstrap UCL 11.39515185 95%Non-parametric UCLs Standard Bootstrap UCL 12.0511721 DESCRIPTION OF DATA SET Project Name: PLA-89 PM 21.4/21.7 AND NEV-89 PM 0.010.4 Project No.: 59300-06-82 Sample Interval: 2,0 to 3.0 ft DATA SET STATISTICS Number of Valid Samples 9 Number of Unique Samples 5 Minimum 2.5 Maximum 32 Mean 10.4 Median 2.5 Standard Deviation 11.652360 Variance 135.777500 Coefficient of Variation 1,120419 Skewness 1.244185 Mean of log data 1.779019 Standard Deviation of log data 1.104714 90%Non-parametric UCLs Standard Bootstrap UCL 15.07324802 95% Non-parametric UCLs Standard Bootstrap UCL 16.66279623