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GEOTECHNICAL <br /> ENGEO ENVIRONMENTAL <br /> NATER RESOURCES <br /> CONS] RUCTION SERVICES <br /> Expect Excellence _--------_— <br /> Project No. <br /> 10391.000.000 <br /> June 14, 2018 <br /> Mr. Ned Phillips <br /> SummerHill Apartment Communities <br /> 3000 Executive Parkway, Suite 450 <br /> San Ramon, CA 94583 <br /> Subject: Carolan Avenue/Rollins Road Project <br /> Burlingame, California <br /> REMEDIAL COMPLETION LETTER FOR OFF HAUL <br /> References: 1. ENGEO, Soil Management Plan, Carolan Avenue/Rollins Road Project; dated <br /> November- 19, 2018 (last rev. January 15, 2015) <br /> 2. ENGEO; Soil Characterization Memorandum, Carolan Avenue/Rollins Road <br /> Project; dated April 25, 2018 <br /> Dear Mr. Phillips: <br /> ENGEO is issuing this remedial completion letter for the above-referenced property (Property) <br /> in Burlingame, California (Figure 1), to confirm that the two areas of interest (corresponding to <br /> SB-21 and SB-22) have been excavated and removed from the Property. The activities <br /> performed were completed in general compliance with the above-referenced Soil Management <br /> Plan (SMP). <br /> Impacts associated with the soil samples SB-21 and SB-22 were excavated and disposed of <br /> offsite to Potrero Hills Landfill on June 7, 2018. The impacted material was off hauled along <br /> with excavations of a former UST and sump area, where impacted soils were identified <br /> (approximately 2,266.85 tons). ENGEO personnel directed the exploratory trenching and <br /> stockpiling of impacted material near SB-21 and SB-22. Catalyst Environmental, Inc., the <br /> remedial contractor, completed the excavations, stockpiling, and off haul of impacted material. <br /> The excavation of the soil remaining onsite, will be completed under ENGEO observation, <br /> following the SMP procedures. The SMP was developed to ensure that any impacted soils <br /> encountered at the Property will be managed separately from the previously characterized soils <br /> detailed in the above-referenced Soil Characterization Memorandum. <br /> If you have any questions regarding this report, please do not hesitate to contact us. <br /> Sincerely, <br /> ENGEO Incorporated <br /> )hZpllon "-__� �hMunger, C <br /> 2010 Crow Canyon Place,Suite 250•San Ramon,CA 94583 •(925)866-9000• Fax(888)279-2698 <br /> www.engeo.coni <br />