SU0008830 SSNL - Laserfiche WebLink

Home Browse Search

10 June 2014 AGE Project No. 14-3035 Page 8 of 16 6.1. SITE MAP A site map showing the approximate location of percolation test hole TH-1 is illustrated on Figure 2. A precise description of the location and construction of the percolation test hole TH-1 is included in Appendix C (EHD form 42-03 11/2/2009). The soil suitability study was conducted within 50-feet of the location of the existing septic system. 6.2. NUMBER OF PERCOLATION TESTS PERFORMED One, shallow, percolation test was conducted on site. The normal percolation of the test hole required the performance of a 24-hour percolation test, with four and one-half hour observation time period. 6.3. CONSTRUCTION OF PERCOLATION TEST HOLE On 18 March 2014, one boring (TH-1) was advanced for a shallow percolation test. The boring was advanced using a four-inch hand auger to a depth of 42-inches bsg. The boring was located more than 100 feet from the current well location and within 50 feet of the septic system location. Following bore hole advancement, the sides of the boring were scraped and loose material was removed from the bore hole. Once the bore hole was cleared of loose material and 2 inches of sand and/or gravel were added to the bore hole. The bore hole was then filled with water to a depth of 12 inches above the gravel at the time of 1200. Test hole TH-1 was covered for 24 hours to allow for complete saturation of the bore hole. 6.4. DESCRIPTION OF THE PERCOLATION TEST HOLE - POST SOAK On 18 March 2014, boring TH-1 was found to be completely dry, but intact and in good condition. 6.5. PERCOLATION TEST CONFORMED TO SJC POLICY EHD 02-02 The work was performed under SJCCDD Title Requirements Section 9-1105.2 (d) and as required by EHD letter, dated 11 April 2011. On 19 March 2014, test hole TH-1 was inspected prior to initiation of the percolation test. The percolation test was performed by recording the amount of water remaining in the bore hole at 30-minute intervals. The initial 6-inches of water seeped from test hole in less than 30-minutes. After recording the measurement the EHD inspector approved a one-hour percolation test. Additional water was added to the boring as required to ensure that approximately 6-inches of water remained. The water level was measured Advanced GeoEn iron mental,Inc.