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Statement of Qualifications for Environmental Consulting Services <br />City of Santa Ana, Public Works Agency <br />w d ... x. -.a- .t,�_v��.a uz..-..., ..�• �.x -. .�.._.� ._� � .�..�._Z wc. 1.-azi� _�....u.,..-we<.�-.4�.�..��i5 <br />During boring advancement, a photoionization detector (PID) can be used to evaluate the <br />soil cuttings for the presence or absence of volatile organic hydrocarbon vapors. Boring logs <br />containing lithologic descriptions and PID readings are prepared. <br />Soil samples are appropriately labeled, placed in laboratory -provided containers, stored in a <br />cooled ice chest, and transported with a chain of custody to the laboratories for analysis. <br />Drilling and sampling equipment are appropriately decontaminated between boreholes. <br />Decontamination rinseate and soil cuttings (if generated) are generally stored on-site in <br />labeled 55 -gallon DOT -approved drums awaiting results of laboratory analysis. At the <br />completion of the field investigation, decontamination rinseate and soil cuttings are <br />transported off site for disposal. <br />Prior to the site visit, team members gather and assess all available documentation about <br />the building or site. Interviews are held with owners, maintenance staff, and other available <br />operations personnel who may have knowledge of past history and renovations. As -built <br />drawings are reviewed for structural details, systems details, and finish schedules in all areas <br />to be disturbed during the construction phase of the renovation project. Having the as -built <br />drawings can be highly beneficial, as they may show locations of hidden or inaccessible <br />areas that may contain hazardous materials. This approach ensures that the building's <br />systems, finishes, and structures will be accurately and efficiently assessed for potential <br />hazardous materials prior to the site visit. In cases where as -built drawings are not provided, <br />the CAD department, in conjunction with our environmental staff, can produce an accurate <br />drawing of the facility. <br />During our site investigations, we sample suspect materials to determine whether or not <br />they contain toxic and/or hazardous materials in regulated quantities. All asbestos building <br />surveys performed will be done so under the direct supervision of a Certified Asbestos <br />Consultant (CAC), utilizing at a minimum, the AHERA guidelines. In addition, we are <br />experienced in the use of and possess an XRF Spectrum Analyzer for on-site measurement <br />of lead content in surface coatings. All lead related building surveys shall be performed by a <br />DHS Certified Inspector/Assessor. Previous building inspections will also be reviewed for <br />the presence of known hazardous materials and any abatement records, if available. This <br />data received is then confirmed at the time of our inspection and incorporated into the <br />survey reports as a known hazardous material. <br />We follow all applicable federal, state, and local guidelines, as well as abiding by our own <br />stringent in-house protocol, when developing and implementing a sampling scheme. Our <br />interpretive reports typically include an executive summary, sampling methodology, results, <br />conclusions, and recommendations. Sample locations drawings can be provided either via <br />Computer Aided Drafting (CAD) or as hand sketched field drawings. Photographic logs of <br />all homogenous materials sampled can provided within the survey report upon request. <br />Soil Vapor Sampling <br />Leighton will direct and observe field activities during the installation of soil vapor probes. <br />Probe locations will be strategically placed across the site to assess potential materials, such <br />as VOCs and Methane, below or adjacent to site features of concern. Leighton is currently <br />Leighton Consulting, Inc. Page 5 <br />