COMPLIANCE INFO - Laserfiche WebLink

Home Browse Search

PSI Project Number:0575-1504 Own Guggenheim—Stockton,CA July 22,2019 Page 4 Three purge volumes will be removed prior to sample collection. Soil vapor is withdrawn from the tubing that runs from the sampling tip to the surface using a 1-liter SUMMA canister connected via an on-off valve. The sampling point, including the tubing, and the filter material (sand pack, etc.), if applicable, is nominally purged of three internal dead volumes. This procedure ensures adequate sample flow is obtained without excessive pumping of air or introduction of surface air into the sample. Sample collection will be timed and a flow controller attached to the Summa canister will be utilized to maintain a flow rate of 200 milliliters per minute or less. The soil-vapor samples will be delivered to the laboratory within 48-hours of collection. All soil-vapor samples collected will be transported to SunStar Laboratories, a State-of-California certified lab, under strict COC protocol. Following collection e soil-vapor sample, the vapor probe willbe remove �an a sample location backfilled with cement grout. All soil-vapor samples collected will be labeled in a clear and precise way for proper identification in the field and for tracking in the laboratory.The soil-vapor samples will be given unique and identifiable names. The soil-vapor sample designation will be the following: SV-( Soil-Vapor) and Location (Number) (i.e. soil-vapor sample collected from site location 3 would be SV-3). At a minimum, the sample labels will contain the following information: sample location, date and time of collection, and personnel collecting the samples. 3.3 SOIL SAMPLING Two soil borings have been selected in the location of the proposed USTs to provide background information on the soil in this area. The soil borings will be drilled to 15 feet bgs. The proposed locations of the soil borings are presented on Figure 2. Soil borings will be advanced using a Geoprobe direct-push drill rig. The drilling services will be provided by a C-57 licensed well drilling contractor. Soil samples will be collected in acetate tubes at 5, 10, and 15 feet bgs for chemical analyses with only the 15-foot sample schedule for analyses, unless field observations indicate petroleum hydrocarbon impacted soil in other samples. All soils that have an indication of petroleum hydrocarbon impact will be selected for analyses. Soil samples will be collected by PSI field personnel working under the supervision of a State of California Professional Geologist. The soil samples will be collected in acetate tubes from the direct- push borings. Upon retrieval of the sampler,a representative soil sample will be preserved for chemical analyses. Once a soil sample is collected, it will be logged on a chain-of custody form, labeled, and placed into a chilled ice chest pending delivery to the analytical laboratory. The soil samples will be delivered to the laboratory within 48-hours of collection. All soil samples collected will be transported to a State of California certified lab, under strict COC protocol. www.intertek.com/building