SU0004505 SSNL - Laserfiche WebLink

Home Browse Search

Ir As previously discussed, we calculate 0.6 mg/I of nitrate-nitrogen (N) in groundwater resulting from the proposed leach fields, a result that is below the state drinking water standard of 10 6. mg/l. Based on this level of nitrate-nitrogen and the depth to groundwater (greater than 100 feet), we anticipate that the impact on surrounding wells will be low. The California Aqueduct is the nearest water body to the site and crosses the site between parcels B and C. Based on the 6. low level of nitrate-nitrogen, the fact that the aqueduct is lined with concrete, and the depth to groundwater, we anticipate that the impact to surface water would also be low. 6" Based on the recorded peLQULes conventional se tic leach trench sewa a disposal systems designed ver SJCEHD criteria shou a eauately serve new residences. However, as previous�ed, we understand that elevated nitrate levels Nave been identified in wells in ` the project vicinity. Based on this information, SJCEHD may require nitrate mitigation measures be implemented in any new sewage disposal system installed at the site. No wells are located on the site, so no water testing was performed to determine the actual nitrate levels at ` the studied parcels. Based on our nitrate loading calculations, if SJCEHD does allow a conventional septic system, the increase in nitrate levels to groundwater will be small. 9. LIMITATIONS Kleinfelder has prepared this report in accordance with the generally accepted standards of care that exist in San Joaquin County at the time of writing. It should be recognized that definition and evaluation of geologic and chemical subsurface conditions are difficult. Judgments leading ` to conclusions and recommendations are generally made with an incomplete knowledge of the subsurface and/or historic conditions applicable to the site. The conclusions of this report are based on the information provided regarding the existing and proposed development and on- site conditions as well as our field observations, percolation test results, and experience in the project area. It was assumed that the percolation test results are representative of the subsurface conditions in the general area. No warranty, expressed or implied, is made. Regulations and professional standards applicable to Kleinfelder's services are continually evolving. Techniques are, by necessity, often new and relatively untried. Different professionals may reasonably adopt different approaches to similar problems. Therefore, no warranty or guarantee, expressed or implied, will be included in Kleinfelder's scope of service. L Kleinfelder will assume no responsibility or liability whatsoever for any claim, loss of property value, damage, or injury that results from pre-existing hazardous materials being encountered Lor present on the project site, or from the discovery of such hazardous materials. This report may be used only by the client and only for the purposes stated, within a reasonable time from its issuance. Land use, site conditions (both on- and off-site) or other factors may Lchange over time, and additional work may be required. Based on the intended use of the report, Kleinfelder may require that additional work be performed and that an updated report be issued. Non-compliance with any of these requirements by the client or anyone else, unless 6. L 48524.G01/ST04R1163 September 3,2004 ©2004 Kleinfelder,Inc. Page 7 of 8 `