Laserfiche WebLink
13 February 1997 <br /> AGE-ITC Project No. 97-0298 <br /> Page 3 of 5 <br /> for the active soil gas investigation will be conducted in conjunction with the assessment of the <br /> former underground storage tank (UST) area at the site. However, evaluation of the data collected <br /> will be presented in separate reports. <br /> 3.2. EQUIPMENT DECONTAMINATION <br /> All sampling tools and probe rods used for sample collection will be thoroughly rinsed with clean <br /> water after washing W'th a solution of Alconox. <br /> 3.3. LABORATORY ANALYSIS <br /> Soil gas samples will be analyzed in accordance with EPA methods SO 10 7 n 5020, which includes <br /> all target compounds. Laboratory reports of soil gas analyzes, testing methods, laboratory quality <br /> assurance/quality control (QAIQC) reports, and sample chain of custody documentation will be <br /> presented in a report with the findings and recommendations. <br /> On-Site Enviromnental Laboratory (OEL) in Fremont, California \1.7111 tentatively be contracted to <br /> provide mobile analytical laboratory services. The Department of Health Services Certification <br /> numbers for OELs mobile laboratories are 1774 and 1842. The method detection limits (MDLs) <br /> established by OEL for methods SO10 and 8020 range from 0.02 to 0.4 parts per million by volume <br /> (ppmv). <br /> 4.0. PROCEDURES <br /> 4.1. COLLECTION OF SOIL GAS SAIMPLL=S <br /> The following procedures will be performed for the collection of soil gas samples: <br /> 1. Notify the DTSC seven working days prior to commencement of any work, while securing <br /> proper city/county soil boring pen-nits. <br /> 2. Boring locations will be marked at least 48 hours in advance for an Underground Service <br /> Alert (USA) check of underground utilities or pipes. <br /> 3. Advance soil gas probe borings both on-site and off-site.Each probe boring will be advanced <br /> to depths between 10 and 20 feet bsg using a van-mounted Geoprobe 5400 probing unit <br /> equipped with 1.125-inch diameter rods. The soil probe boring locations are depicted on <br /> Figure 2. Additional probe boring locations will be established and sampled based on field <br /> �.. _ c <br />