Laserfiche WebLink
June 6, 2014 <br /> Mr. Johnny Yoakum <br /> Page 3 of 7 <br /> Reference: Work Plan for Soil Boring Assessment <br /> Chevron Station No. 96171 <br /> 6633 Pacific Avenue <br /> Stockton, California 95207 <br /> Not an Open LUST Case <br /> File:213202493 <br /> groundwater. Depth to water measurements from wells located at the Site ranged from 36 <br /> to 57 feet bgs from 1997 to 2008; most recently 34 to 36 feet bgs during the November 1, <br /> 2008 gauging event. If groundwater is encountered during drilling, then samples should be <br /> collected from temporary wells using disposable bailers and placed into laboratory <br /> provided containers and placed in an ice-filled cooler for delivery under chain of custody <br /> (COC) protocol to the laboratory. <br /> The collected soil samples will be placed in stainless steel sleeves, capped, labeled, and <br /> packaged in lab provided protective baggies. The protective baggies will then be <br /> labeled, and placed in an ice-filled cooler for delivery under COC protocol to the <br /> laboratory. <br /> Subsequent to the completion of each boring, the boring will be properly abandoned and <br /> finished flush with existing surface grade (from bottom of boring to 3 feet bgs hydrated <br /> bentonite chips or granules will be used and completed with a 3-feet thick concrete cap). <br /> Proposed soil boring locations are shown on the attached Figure 2, Site Map. <br /> Laboratory Analysis <br /> Soil <br /> Two soil samples (with the highest PID concentration and at the bottom of the boring or <br /> capillary fringe) will be analyzed by the laboratory per boring (BA-1 through BA-3). If no <br /> PID readings are reported, then the 10 foot bgs soil samples should be collected from BA- <br /> P and BA-2 while the 5 foot soil samples should be collected from BA-3 to assess near the <br /> bottom of the gasoline USTs and the fuel dispensers, respectively. <br /> Soil samples collected from proposed borings BA-1 through BA-3 will be analyzed for TPH- <br /> GRO by EPA Method 8015; and Benzene, Toluene, Ethylbenzene, total xylenes (BTEX), <br /> methyl Cert butyl ether (MTBE), ethyl tert butyl ether (ETBE), Cert amyl methyl ether (TAME), <br /> di-isopropyl ether (DIPE), and alcohols, such as t-butyl alcohol (TBA) and ethanol (EtOH) <br /> by EPA Method 8260B. <br /> Due to the proximity of a former used oil UST that does not appear to have been <br /> assessed to date, soil samples collected from proposed boring BA-1 will also be analyzed <br /> for TPH-DRO and TPH-ORO by EPA Method 8015; volatile organic compounds (VOCs) by <br /> EPA Method 8260B; if impacts are above 10 mg/kg then Title 22 Metals and <br /> Design with community in mind <br />