Laserfiche WebLink
Please find his diagram and our proposed sampling plan. This diagram shows the maximum allowed angle for the boring <br /> when using a S <br /> Ground Surface = <br /> 45° <br /> ryy�� fy <br /> D;= 20 t <br /> UST <br /> VV= 0 tt <br /> D=20* L=28.3' W2 + D2 — 0 <br /> C<onc ample interval 1: 11'-1* LZ ;-- 202 + 202 <br /> a = 7' L — t <br /> Sample lrh[MaF 2- 17'-20' <br /> Table 1: Summary of Explorations and Locations <br /> Boring Planned Estimated Soil GW County Comment <br /> ID Depth Angle Sampling Sampling <br /> (Total footage) (degrees) (Depth from (Depth from <br /> surface) surface) <br /> B-4 28 45 11-14,17-20 14 San Joaquin Tank boring <br /> B-5 28 45 11-14,17-20 14 San Joaquin Tank boring <br /> B-6 28 45 11-14,17-20 14 San Joaquin Tank boring <br /> P-413 10 30 8.5 N/A San Joaquin Piping boring <br /> Erical Rodriguez <br /> Wayne Perry,Inc. <br /> 714.267.5147(cell) <br /> From: Erica Rodriguez <br /> Sent:Tuesday,January 11, 2022 4:09 PM <br /> To: 'Ernest, Frederick [EHD]' <fernest@slgov.org> <br /> Cc: 'Steve n.J.Jones@shell.com'<Steven.J.Jones@shell.com>; 'Geijer, Theresa A SPLC-STD/HA' <br /> <theresa.geiier@shell.com> <br /> Subject: RE: 3515 Navy Dr.,Stockton, CA- Post-UST and Piping Closure in Place data evaluation <br /> Frederick, <br /> WPI,on behalf of,Shell would like to discuss the data that you received from the laboratory yesterday. The data from P1, <br /> P2 and P3 is found in the attached laboratory report,J82182-1 LIDS Level Report Final. Sample locations are shown on the <br /> drawing labeled November 2021 Piping Sample Diagram. Within the report detections of petroleum hydrocarbons are found <br /> in the samples from beneath the closed-in-place pipeline. These concentrations indicate a weathered historic release at <br /> the pipeline evidenced by the findings with limited benzene and presence of naphthalene. WPI has a groundwater <br /> monitoring well in the area of the pipeline,MW-13R,we provided the cumulative GW data from this well to <br /> demonstrate the overall decrease in concentrations at this point indicating that the detections found under the pipeline <br /> do not represent a new release. We also provided a Plot showing the benzene concentrations found in groundwater at <br /> the location which is a figure we provide the Central Valley Regional Water Quality Control Board semi-annually. <br /> 4 <br />