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u � <br /> 15 March 2005 <br /> AGE-NC Project No. 04-1233 <br /> Page 2 of 4 <br /> 20 linear feet of leach line and the bottom of each seepage pit of the on-site, residential septic <br /> system. On 16 December 2004,a Well Boring Permit Application was submitted and approved.On <br /> 03 January 2004, an AGE representative was on site to locate the sampling points requested by <br /> SJCEHD. Utilizing a small excavator the distribution box was located and uncovered. Each leach <br /> line was uncovered at the source point and traced to the termination point, where the top of the <br /> seepage pit was made visible for inspection. Sampling points adjacent to each leach line were <br /> marked and uncovered at each 20 foot interval from the source point.The design of the septic system <br /> and locations of the sampling points are indicated on the site plan(Figure 2). <br /> SOIL AND WATER SAMPLING <br /> On 04 February 2005, an AGE representative met Mr. Michael Infurna of the SJCEHD at the site <br /> for approval of the requested sampling locations.Following SJCEHD approval,eleven soil samples <br /> (LL-1 through LL-09,DB-10,ST-11 )were collected at the specified locations.A water sample was <br /> also collected from the on-site domestic well (DW-1). Samples LL-1 through LL-6 and LL-9 were <br /> collected at a depth of 3 to 5 feet below surface grade(bsg),directly beneath the leach lines. Samples <br /> LL-7 and LL-8 were collected at 26.5 feet bsg directly beneath the seepage pits. Sample DB-10 was <br /> collected at 4 to 5 feet bsg directly beneath the distribution box. Sample ST-11 was collected 8 feet <br /> bsg from an area under the septic tank. Soil samples were collected using a Geoprobe soil sampling <br /> assembly loaded with four pre-cleaned 1.125-inch by 6-inch brass sleeves.The uppermost sleeve of <br /> each soil sample assembly was preserved by covering both ends of the brass sleeve with Teflon <br /> sheets, capping, and sealing with tape. <br /> All samples were properly labeled,placed in a appropriate, chilled container and transported under <br /> chain-of-custody to Cal Tech Environmental Laboratory a State of California Department of Health <br /> Services (DHS)-certified laboratory. The samples were analyzed for: <br /> • Total recoverable petroleum hydrocarbons(TRPH)in accordance with EPA Method 8015m, <br /> carbon chain C-5 through C-42; <br /> • Full scan 8260b, reporting all peaks; <br /> • Chloride in accordance with EPA Method 300.0; and <br /> • pH in accordance with EPA Method 150.1. <br /> LABORATORY RESULTS <br /> Chloride was detected at 6.6 mg/1 in the domestic well sample.None of the other target analytes were <br /> reported at concentrations above the detection limits. The pH analysis of all samples was measured <br />