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r <br /> 1 <br /> 20 November 1995 <br /> AGE-NC Project No. 95-0152 <br /> Page 3 of 4 <br /> 3.2. EQUIPMENT DECONTAMINATION <br /> All sampling tools and brass sleeves used for sample collection will be thoroughly rinsed with clean <br /> water after washing with a solution of Alconox. All Geoprobe rods will be steam-cleaned prior to <br /> advancement in each probing. <br /> 3.3. LABORATORY ANALYSIS <br /> i <br /> Selected soil samples will be analyzed for total petroleum hydrocarbons quantified as gasoline and <br /> (TPH-g)and volatile aromatics(benzene,toluene, ethyl benzene, and xylene: BTE&}Q in accordance <br /> with EPA methods 8015 and 8020, respectively. j <br /> 4.0. PROCEDURES µ <br /> 4.1. COLLECTION OF SOIL SAMPLES <br /> i <br /> For collection of soil samples, the following procedures will be performed: <br /> 1. Notify the San Joaquin County PHS-EHD 48 hours prior to commencement of any work. <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 three (3) soil probings, using a van-mounted, 1.125-inch diameter probe rods to a <br /> maximum depth of approximately 65 feet. Probing locations are depicted on Figure 2. <br /> 4. Decontaminate sampling equipment in an Alconox solution and rinse twice with water prior <br /> to each sampling run. <br /> 5. Obtain discrete soil samples at five-foot intervals, using a Geoprobe soil sampler assembly <br /> loaded with pre-cleaned 1.125-inch by 6-inch brass sleeves. <br /> 6. Preserve soil in the second brass sleeve by covering both ends with aluminum foil or Teflon <br /> sheets, capping, and sealing with tape. <br /> 7. Store the samples under ice and transport the samples in a chilled container to a State certified <br /> laboratory for analysis. <br /> 8. Screen soil sample duplicates for the presence of volatile organics using a photo-ionization <br /> detector (PID) pre-calibrated to isobutylene. <br /> 9. Log borings in accordance with the Unified Soil Classification System. <br />