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1 SOIL VAPOR EXTRACTION PILOT STUDY REPORT San Joaquin County <br /> Montgomery Ward Auto Service Center Public Health Services Deparnnent <br /> 5400 Pacific Avenue,Stockton CA Site Code 2163 <br />' APPENDIX H <br />' STANDARD OPERATING PROCEDURES <br />' All work will be completed under the supervision of an EAI California registered geologist or <br /> registered civil engineer experienced in conducting hydrogeologic investigations The purpose <br /> of this appendix is to outline Standard Operating Procedures (SOP) that will be followed by <br />' Environmental Audit, Inc (EAI) related to well construction and sampling, effluent <br /> management, etc <br /> DRILLING AND SOIL SAMPLING <br /> 1 The vapor extraction wells will be drilled, under the supervision of EAI geologists or <br /> engineers, using eight-inch diameter continuous flight hollow stem augers The wells will be <br />' drilled to the depths specified in the Work Plan to which this appendix is a part <br /> Soil samples will be collected during the drilling of each well at approximate depth intervals <br /> specified in the Work Plan Care will be taken to ensure that soil samples are collected for <br /> analytical testing at or near the maximum expected contaminant concentrations of the soil <br /> profile All borings will be logged in accordance with the Unified Soil Classification System <br /> Soil samples will be collected using six 2 5-inch diameter by 3-inch long brass tubes mounted <br /> within a 2 5-inch inside diameter split-spoon drive sampler employed in advance of the augers <br /> After sample recovery, the ends of the lowermost tube will be covered with aluminum foil and <br /> plastic caps taped over the ends Prior to use, all tubes will be washed in a solution of <br /> Alconox detergent and tap water, and rinsed with distilled water The samples will be labeled <br /> with the sample point identification, depth interval, EAI project number, time and date, <br /> individually sealed in "Zrploc" plastic bags, and munediately placed into an ice chest chilled <br /> using ice and/or frozen blue ice The samples will be kept chilled until delivered to the <br /> laboratory for analytical testing All samples will be logged on EAI Chain of Custody Record <br /> forms <br />' An HNU photoionization detector (PID), or equivalent instrument, will be utilized on the soil <br /> contained in the second tube from the bottom of the shoe, at each sampling interval within the <br /> borings, to determine if volatile vapors were emanating directly from the soil Each sample <br /> will be placed in an airtight "Zrploc" plastic bag The samples will be allowed to sit in the sun <br /> for approximately ten minutes, and then the head space in the bags will be analyzed using the <br />' PID The results of this testing will be recorded on the boring logs <br /> VAPOR EX I RAC;I ION WELL CONS T RU C,1 ION <br /> The vapor extraction wells will be constructed of two-inch inside diameter, flush-threaded <br /> Schedule 40 polyvinyl chloride (PVC), well casing All well casing materials will be steam <br /> cleaned prior to installation The wells will be drilled to the maximum depth specified in the <br /> Work Plan <br /> The wells will be constructed with a slotted section (0 020-inch x one-inch slots) that extends <br /> across the depth interval specified in the Work Plan The annular space between the borehole <br /> Iwall and well casing will be backfilled using grade #3 Monterey sand to approximately two <br /> Project No 1232 C-1 ENVIRONMENTAL AUDIT, INC <br />