ARCHIVED REPORTS XR0003365 - Laserfiche WebLink

Home Browse Search

IE C ® R W Additional Site Assessment and Site Conceptual Model 7-11 Store #14117 September 30, 2005 Page 7 the California Regional Water Quality Control Board Field notes for the geoprobe and CPT advancement are in Attachment C A report of the CPT work generated by Gregg Drilling and Testing, Inc is in attachment D 4.1 Site Health and Safety SECOR prepared a site-specific Health and Safety Plan for well installation and sampling activities at the site that included hand-augering, as required by the Occupational Health and Safety Administration (OSHA) Standard "Hazardous Waste Operations and Emergency Response" guidelines (29 CFR 1910 120) The document was reviewed and signed by SECOR personnel and subcontractors performing work at the site 4 2 Permitting, Utility Location, and Access Agreements Well construction and soil boring permits were obtained from the SJCEHD prior to commencing field activities and an access agreement was obtained from the property owner for the advancement of GP-1, GP-2 and CPT-2 within the property adjacent and to the north of the 7-11 site (Attachment E) Additionally, an encroachment permit was obtained from the City of Stockton for the advancement of CPT-3 within the city right of way along Ryde Avenue (Attachment E) SECOR was unable to obtain a temporary access agreement from USA Petroleum Company for the advancement of proposed groundwater monitoring well MW-9 Prior to conducting subsurface work at the site, USA was contacted to delineate subsurface utilities near the site with surface markings In addition, a private utility locator service was contracted to clear each of the proposed drilling locations Due to the presence of underground utilities surrounding proposed groundwater monitoring well MW-10, it was not installed SECOR is currently working to obtain a temporary access agreement with the private property owner to install MW-10 approximately 15 feet southeast of the originally proposed location (Figure 2) Proposed shallow geoprobes GP-1 through GP-3 were not installed as planned as their originally proposed locations were inaccessible to the geoprobe rig Alternative locations for GP-1 and GP-2 were chosen approximately 50 feet to the north (Figure 2) 4 3 Soil Barings and Sampling CPT borings CPT-1 through CPT-3 were advanced to 110 feet bgs and shallow geoprobe borings GP-1 and GP-2 were advanced to 16 feet bgs Soil samples were collected from CPT-1 at approximately 60, 70, 80 and 105 feet bgs Shallow geoprobes borings GP-1 and GP-2 were continuously cored from five to fifteen feet bgs in GP-1 and GP-2 Sol] samples were collected from CPT-1 through CPT-3 using direct-push piston-type sampler while soil samples collected from GP-1 and GP-2 were collected using a Macro Core® sampling device Soil samples were collected by a SECOR field geologist working under the 117-Elevenl7-11 Stores1141171Reports114117 SCM and Additional Assessment doc Page 7