J_2024 05 09_West Orange Stormwater Management Plan

August 8, 2022 File No. 26.0092704.00 PSE&G – West Orange, NJ Page 3 Proactive by Design encountered. Approximately 10 feet of rock core was then obtained from each of the borings. The test pits were excavated using a Komatsu PC 45MR track excavator provided by a PSE&G subcontractor (Furino & Sons) and extended to depths of approximately 5 to 9.5 feet bgs. The approximate locations of the explorations performed for this study and two nearby test pits from a prior study performed at the station are shown on the Plot Plan, Plate 2. All field work was performed under the direct technical observation of representatives from GZA. Our representatives located the explorations in the field relative to existing surface features, maintained continuous logs of the explorations as the work proceeded and supervised the soil and rock sampling operations. After hand excavating to 3 feet for the borings, soil samples suitable for identification purposes were extracted from the borings at closely spaced intervals in general accordance with the procedures of the Standard Penetration Test (ASTM D-1586). Ten feet of rock was cored at each boring location using an NX-size core barrel which extracts a core approximately 2 inches in diameter. Upon completion, the borings were grouted. Photographs of the rock cores are presented in Appendix I. In addition, our representative collected representative bulk and relatively undisturbed tube samples from the various strata encountered in the test pits. Single ring infiltration tests were initiated within the upper 3 to 3.3 feet in the test pits to obtain information for stormwater design purposes. Three-inch diameter tubes were collected from each test pit at approximate depths of 3 and 8 feet for geothermal testing. After the test pits were completed, they were backfilled using the excavated materials. Detailed descriptions of the encountered subsurface conditions are presented on the Test Boring Logs, Plates 3A through 3E and Test Pit Logs, Plates 4A through 4C. The soil samples obtained from the test An Equal Opportunity Employer M/F/V/H