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© KMEA„ • Provide on -site monitoring of excavated soil by a qualified environmental technician from KMEA during construction activities. • Document the observations during excavation by using on -site direct reading instruments such as Photoionization Detector (PID) or Flame Ionization Detector (FID). • Provide consultation and instructions to the City and construction crew as to the nature and condition of subsurface soils encountered. Provide time -critical response in managing and coordination of petroleum hydrocarbon impacted soil, if encountered, and assist the City with temporary staging, segregating, temporary storage, chemical profiling, manifesting, shipping and disposal of the contaminated soil, as necessary. • Based on information from the Geotracker database, it is estimated that the area where potentially contaminated near - surface soil may be present covers approximately 6,700 square feet with an average thickness of 5 feet over this area. Anticipated depth below ground surface at which the residual petroleum hydrocarbons may be encountered is approximately 5 feet. As such, if construction excavation extends to 5 feet below ground surface in this area, it is likely that petroleum hydrocarbon contaminated soils will be encountered requiring excavation monitoring and special handling of the impacted soil. • For the purposes of this proposal, it is assumed that from the total estimated 1,245 cubic yards of potentially contaminated soil (82' x 82' x 5') approximately 100 cubic yards will require removal, stockpiling, chemical profiling and special handling. • Assuming up to 100 cubic yards of non -hazardous petroleum hydrocarbon impacted soils will be generated from the construction excavation activities, collect up to 4 soil samples from the stockpiled soils for chemical profiling based on available historic information and the disposal facility acceptance criteria. • Analyze the soil samples for total petroleum hydrocarbons (TPH), volatile and semi -volatile organic compounds (VOCS) and (SVOCs), Title 22 Metals and Polychlorinated Biphenyls (PCBs) using the EPA Methods 8015M, 8260B, 8270C, 6010B, and 8082A, respectively. • Document the site observations in daily field logs. • Prepare a report of site observations including the details of daily activities, conditions encountered, mitigation measures taken, and documentation of final impacted soil disposition. Scope of Hazardous Materials Surveys — Pre -demolition Surveys (A2): In addition, as part of its redevelopment plans, the City may wish to conduct a hazardous materials survey at the existing gas station to acquire pre -demolition data. This survey would follow the general scope of work as provided in Section D of this proposal. Our anticipated type and number of asbestos and paint chip samples for lead evaluation include: • 120 bulk samples for asbestos analysis • 36 paint chip samples for lead analysis Proposed Schedule for Site Located at 2245 S. Main Street (Arco Gasoline Station): KMEA can complete a Phase I ESA including a report for this site in three weeks depending on the availability of knowledgeable site contacts to interview and site access. Accelerated turnaround is available upon request by the City at additional cost. The hazardous materials survey for this location can be conducted in one to two days depending on site access followed by the notice to proceed. Standard turnaround time for laboratory analyses is between 7 to 10 days from the date of submittal of the samples to the laboratory. KMEA will prepare the hazardous materials survey summary report in one week or less following receipt of the laboratory results. The laboratory analyses and report preparation timelines may be accelerated at the City's discretion at additional costs. Under the Phase II service area, KMEA anticipates that the City's plans for street improvements would vary depending on such variables as mode of traffic, contractor availability, etc. As such, for the purposes of this proposal, it is assumed that any construction activity that would overlap the area where subsurface soil contamination presence is documented at the gas station may take up to five business days. If properly segregated, contaminated portion of the stockpiled soils would be characterized and profiled by sampling and analytical laboratory testing within 7 to 10 business days from the time of generation. KMEA will then arrange for shipment of these materials within 2 to 5 business days. For the purposes of this proposal, KMEA assumes that up to 100 cubic yards of non- hazardous petroleum hydrocarbon contaminated soil may require special handling and disposal at an offsite licensed disposal facility. KMEA also assumes that the current facility owner will be responsible for signing the waste manifests prior to shipment offsite. City of Santa Ana Page 20 June 5, 2018 Various Environmental Services RFP NO.: 18-043