Laserfiche WebLink
AdvancedGoilr <br />An Employee -Owned Company <br />15 September 2020 <br />Project No. 18-4357 <br />Mr. William Johns <br />1640 North Broadway Avenue <br />Stockton, CA 95205 <br />Subject: Addendum to Revised Site Assessment Report <br />FORMER GLOBAL MATERIALS MANAGEMENT <br />1640 North Broadway Avenue, Stockton, California <br />Dear Mr. Johns: <br />At your request, AdvancedGeo, Inc. (AGI) has prepared this Addendum to Revised Site <br />Assessment Report (Addendum) to summarize and document soil sampling and waste <br />disposal activities performed at 1640 North Broadway, Stockton, California (site or subject <br />property) between December 2018 and March 2019. <br />Site background information and results from previous investigations were included in the <br />Revised Site Assessment Report dated 13 November 2018. The site and surrounding <br />area are illustrated in Figure 1. On-site structures and soil excavation/potholing locations <br />are illustrated in Figure 2 and all soil sampling locations are depicted in Figure 3. <br />1.0. SOIL SAMPLING PROCEDURES AND LABORATORY ANALYSIS <br />DECEMBER 2018 <br />On 11 December 2018, a confirmation soil sample (CS -5.5) was collected at 5.5 feet <br />below surface grade (bsg) from the main excavation area (B-5) under the supervision of <br />the San Joaquin County Environmental Health Department (EHD). The soil sample was <br />collected as recommended in the Revised Site Assessment Report to confirm delineation <br />of the vertical extent of total petroleum hydrocarbons (TPH) in soil. The soil sample was <br />collected using a slide hammer loaded with one 2 -inch by 6 -inch steel sleeve. Following <br />sample collection, the ends of the steel sleeve were covered with Teflon, capped, and <br />sealed with tape. The sample sleeve was labeled with sample location, designation, time, <br />date and sampler's initials and then placed in a chilled container with ice and transported <br />under chain -of -custody to Enviro-Chem Inc. (ECI), a California Environmental Laboratory <br />Accreditation Program (ELAP)-certified laboratory, located in Pomona, California. <br />837 Shaw Road • Stockton, CA 95215 <br />Telephone (800) 511-9300 • Fax (888) 445-8786 <br />