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r Mr. Wayne Dietz July 14,2008 2154 S. El Dorado Street Investors, a California Limited Partnership Page 3 of 8 On June 25, 2008 ROKEN notified Underground Service Alert (USA)prior to the drilling start date (Ticket No.240-353). ROKEN could not review available as-built drawings to determine the presence and alignment of on-site utilities, as they were not provided by Client. ROKEN visually inspected the site prior to drilling and in addition, ROKEN procured the services of Subtronics, a utility locating contractor to check the proposed drilling locations for buried utilities and buried metal obstructions. On June 29, 2008 Subtronics utilized a suite of electromagnetic line locating (EMLL)equipment to detect the subsurface features at and around the proposed drilling locations. Potential subsurface obstructions and utility alignments in the vicinity of the proposed boring locations were painted on the ground and illustrated on a site map. ROKEN prepared a health and safety plan for work conducted at the site as required pursuant to the regulations in 29 Code of Federal Regulations (CFR)Part 1910.120 and California Code of Regulations (CCR), Title 8, Section 5192. ROKEN and contracted personnel involved with the proposed field work reviewed proper health and safety practices and signed the health and safety plan following their review of the document. ROKEN prepared a workplan for the groundwater investigation and the workplan was submitted to the San Joaquin County Environmental Health Department(SJCEHD)with the required permit application and fees to obtain a permit for soil borings and groundwater sampling. ROKEN obtained the SJCEHD permit(SR#54706) on June 27, 2008. GROUNDWATER SAMPLING AND ANALYSIS RSI Drilling utilized a combination of direct push and rotary drilling methods to collect groundwater samples at ten(10)on-site sampling locations as depicted in attached FIGURE I. The drilling began on June 30, 2008 and was completed on July 2, 2008 (3 days). At each sample location a soil boring was advanced to depths of approximately 45 feet bgs or less depending on the depth that groundwater is encountered. Soil was inspected in the field but no soil samples were collected for this investigation. ROKEN utilized a PID to monitoring drilling and sampling conditions. At each groundwater sample location,a temporary PVC well screen was placed in the boring to collect groundwater. The temporary well was not purged or developed. At each boring location,groundwater"grab" samples were collected in laboratory-provided sample containers as specified for the following laboratory analyses: EPA Method 8260b-VOCs,TPH as Gasoline, 7 fuel additives and lead scavengers EPA Method 8270 - Semi Volatile Organic Compounds EPA Method 8015M-TPH as Diesel and Motor Oil EPA Method 6010 - LUFT 5 Metals (Cadmium, Chromium,Nickel, Lead, Zinc) For quality control/quality assurance (QA/QC), ROKEN also submitted one (1) duplicate groundwater sample and one (1) trip blank sample. These samples were analyzed by the same methods listed above. All samples were labeled, and stored in an ice-filled cooler pending delivery to the laboratory for analysis. At the completion of the job all samples were transported under standard chain-of-