ARCHIVED REPORTS_XR0003891 - Laserfiche WebLink

Home Browse Search

name and initials of the geologist . Each sample is then placed in a zip lock bag and deposited in an ice chest containing enough ice to preserve the samples at 40C for chain-of-custody delivery to a California State Certified Laboratory. SOIL SAMPLES Samples to be submitted for analysis to a state certified laboratory from the drilling of the monitor well are proposed for the vadose zone where field screening (PID) is highest, the top of ground water, and at the base of the borings; this sampling is for the proposed boring, MW8 . The proposed analyses for these samples are for Total Fuel Hydrocarbons as gasoline w/ BTEX Distinction, utilizing EPA Methods M8015 and 8020 PROPOSED WELL COMPLETION The well will be completed to approximately 60 feet below the surface with 0 . 020 slot 2" FVC screen from 60 feet to 35 feet and with blank PVC casing from 35 feet to the surface The sand envelope will be #3 Monterey sand and will be positioned from the 301 depth to the 60 foot depth and bentonite from 30 feet to 29 feet (see Appendix E, "Proposed MW8 Construction" ) Cement (with less than 5% bentonite) will be used to seal the annular space from the 29 foot depth up to the the steel traffic box The traffic box, fitted with a locking system and well ID tag, will be set in concrete The selection of filter pack, slot size and screen length for ground water monitor well construction was made by comparison of nearby LUST sites (Arco Products, 501 Kettleman Lane, Lodi and Kayo Oil Company, 900 Sth Cherokee Lane, Lodi) with 9 ground water monitoring wells on site The ground water clarity from the wells at this site and the expected similarity of lithologies to be encountered was used as the basis for construction materials selections . A review of the California Department of Water Resources records by Western Geo-Engineers was conducted on January 5, 1992 for the Purpose of determining high and low ground water fluctuations in this area; the best ground water data available is that which is already compiled from the existing monitor webs ori this site . The 'high' aquifer depth for this area was from S1 and S2 at approximately 381 , this was in 1987 To ensure that ground water depth fluctuations are observed in MW8 , Western Geo-Engineers proposes that 25' of screen be utililized for this well configuration. ✓ 7