BEGIN:VCALENDAR VERSION:2.0 METHOD:PUBLISH PRODID:-//Tendenci - The Open Source AMS for Associations//Tendenci Codeba se MIMEDIR//EN BEGIN:VEVENT DESCRIPTION:--- This iCal file does *NOT* confirm registration.\r\nEvent d etails subject to change. ---\r\nhttps://www.grac.org/events/106/\r\n\r\nE vent Title: Sacramento Branch Meeting - Geology and Geochemistry of Chromi um Sources in California’s Groundwater\r\nStart Date / Time: May 10, 201 7 17:30 PM US/Pacific\r\nLocation: Aviators Restaurant\r\nGoogle\r\nhttp:/ /maps.google.com/maps?q=6151+Freeport+Blvd,Sacramento,California,95822\r\n \r\nForecast\nhttp://www.weather.com/weather/monthly/95822\r\n\r\n\r\nThe Sacramento Branch is pleased to present:\r\n \r\nWilliam E. Motzer, PhD, P G, CHG\r\nSenior GeochemistTODD Groundwater\r\nGeology and Geochemistry of Chromium Sources in California&rsquo\;s Groundwater\r\n \r\nPRESENTATION: \r\nChromium (Cr) including Cr(VI) species occur in California&rsquo\;s gr oundwater from both anthropogenic and geogenic (natural sources). Past inv estigations largely focused on anthropogenic sources (e.g., added to water as a biocide) popularized by the 2000 movie Erin Brokovitch. More recentl y, groundwater investigations have considered geogenic sources with Califo rnia having a unique geologic framework, including numerous areas of ultra basic and serpentinized ultrabasic rocks. These contain abundant Cr and Cr minerals, which when weathered, can undergo transformation in the critica l zone to Cr(VI) complex oxyanions.\r\nThe San Francisco Bay Area has seve ral areas where ultrabasic and serpentinized rocks can be observed, includ ing areas on Mt. Diablo in Contra Costa County and the Ring Mountain Open Space Preserve (RMOSP) in Marin County. In the critical zone, many RMOSP s oil types derived from the underlying serpentine and ultramafic rocks are serpentine soils, with unusually high concentrations of iron, chromium, ni ckel, and cobalt. However, these often are deficient in calcium and have l ow water holding capacities. Such soils can be very stressful for plant gr owth, consequently forming serpentine barrens commonly consisting of open grassland or savannas where the climate would normally result in forest gr owth. Serpentine barrens also result in unique eco- or model-systems for e volution, ecology, and conservation studies of rare plant communities. On RMOSP serpentine soils cover about 225 acres.\r\nGroundwater in alluvial a quifers derived from ultrabasic and serpentinized terrain can contain Cr(V I) oxyanions, particularly chromate (CrO42&ndash\;) and dichromate (Cr2O72 &ndash\;), generally forming under alkaline pH and oxidizing (+Eh) conditi ons. In other areas, Cr(VI) oxyanions can sorb to hydrous ferrous oxide (H FO) coatings on quartz grains. For projects in which recycled water (RW) i s introduced to replenish depleted groundwater supplies, changes in pH and Eh have the potential for liberating Cr(VI), arsenic, and lead. Leaching tests with stabilized RW and geochemical modeling, using USGS PHREEQC and PHAST models can be used to assess possible impacts to groundwater by thes e constituents.\r\n \r\nSPEAKER BIO: \r\nWilliam E. (Bill) Motzer is a reg istered California Professional Geologist (PG) and Certified Hydrogeologis t (CHG), with PG registrations in five other states. Bill has extensive e xperience in conducting surface and subsurface water quality chemistry and environmental forensic investigations. Bill is a recognized expert in wat er quality and forensic geochemistry, with particular expertise in stable and other isotopic &ldquo\;fingerprinting&rdquo\; and age dating technique s, water quality/contaminants, and emerging contaminant geochemistry. He h as conducted numerous environmental projects, throughout California and ot her western states. He is a past President of the San Francisco Bay Branch of the Groundwater Resources Association of California (GRA), past Vice P resident for the International Society of Geochemistry and Health, and con tributing editor to the California Section of the American Chemical Societ y&rsquo\;s (ACS) newsletter &ndash\; the Vortex (www.calacs.org).\r\n \r\n ANNOUNCING SCHOLASTIC SPONSORSHIP OPPORTUNITIES:\r\n \r\nAll Proceeds to B enefit Science Students\r\nThe GRA Sacramento Branch has a history of supp orting university-level science students. Our Scholastic Sponsorship Progr am is an opportunity to publicize your business while contributing toward a good cause. The cost is minimal\; if interested, please contact Ellen Py att at (916) 852-9118 x 512 or pyatt@geoconinc.com.\r\n \r\nTHIS MONTH'S S PONSOR:\r\n\r\nASC Tech Services (ASC) is a professional environmental fie ld services company founded in 1996 by a Geologist with over 25 years of e nvironmental consulting experience. ASC specializes in the implementation of High-Resolution Site Characterization (HRSC) technologies to assist con sultants and clients in the understanding of subsurface lithology/hydrogeo logy and/or contaminant distribution in real-time. ASC can acquire HRSC da ta to determine lithologic/hydrogeologic changes and track contaminants by taking a snapshot of the subsurface with minimal disturbance of the subsu rface and without generating soil or groundwater wastes. With innovative H RSC technologies, ASC can assist consultants and clients to evaluate a sit e in one visit, allowing the infield professionals to make real-time decis ions. Our services are provided with geoscientists in the field in order t o assist consultant and client personnel in the interpretation of HRSC dat a.\r\nASC provides professional, cost-effective services globally.\r\n\r\n (MIP) Membrane Interface Probe\;\r\n(HPT) Hydrologic Profiling Tool\;\r\n( OIP) Optical Image Profiler\;\r\n(UVOST®\;) Ultra-Violet Optical Screen ing Tool\;\r\n(EC) Soil Conductivity Testing\;\r\n(MiHpt) Combined MIP/HPT \;\r\n(MIP-CPT) Combined MIP/CPT\;\r\nCombined MiHpt/CPT\;\r\n(PST) Pneuma tic Slug Testing\;\r\nGeothermal &\; In-Situ Pressure Profiling/Monitor ing\;\r\nHydrostratigraphic &\; Hydrogeologic Characterization &\; M odeling\;\r\nMulti-Variant Modeling &\; GIS Integration.\r\n\r\nASC is a State of California Certified Small Business (SB/MB) and Minority Busine ss Enterprise (MBE).\r\n \r\nAGENDA: Social Hour 5:30-6:30 p.m. Announce ments &\; Dinner 6:30-7:30 pm Presentation 7:30-8:30 pm Usual great fo od, including two meat entré\;es, salad, rice, potatoes, vegetable a nd Iced Tea. A No-host beer and wine bar will be available. MEETING COSTS: \r\nMembers: $27.00 Non-Members: $32.00 Students: $10.00\r\n\r\nIf you reg ister after Noon on Monday, May 8th, or walk-in, a $3.00 surcharge will be added to the meeting cost.\r\nCancellations must be made by Noon on Monda y, May 8th.\r\n\r\n \r\nQuestions about the meeting, please telephone Rodn ey Fricke at (916) 407-8539 or email him at rodneyafricke@gmail.com. Quest ions about the Sacramento Branch in general, including submittal of your i deas and/or desires for future presentations, please telephone Linda Bond at (530) 757-1500 or email her at Linda.Bond@water.ca.gov\r\nUPCOMING MEET INGS &\; EVENTS:June 14th: Barry Hecht with Balance Hydrologics, Inc., Post-Fire Effects on Channels and Recharge--- This iCal file does *NOT* co nfirm registration.Event details subject to change. ---\r\n\r\n--- By Tend enci - The Open Source AMS for Associations ---\r\n UID:uid106@grac.org SUMMARY:Sacramento Branch Meeting - Geology and Geochemistry of Chromium Sources in California’s Groundwater DTSTART:20170511T003000Z DTEND:20170511T033000Z CLASS:PUBLIC PRIORITY:5 DTSTAMP:20240319T025000Z TRANSP:OPAQUE SEQUENCE:0 LOCATION:Aviators Restaurant X-ALT-DESC;FMTTYPE=text/html:
 \;
William E. Motzer, PhD, PG, CHG
Senior Geochemist
TODD Ground
water
Geology and Geo chemistry of Chromium Sources in California&rsquo\;s Groundwater
 \;
PRESENTATION:
Chromium (Cr) including Cr(VI) species occur in California&rsquo\;s groundwater fro m both anthropogenic and geogenic (natural sources). Past investigations l argely focused on anthropogenic sources (e.g., added to water as a biocide ) popularized by the 2000 movie Erin Brokovitch. More recently, g roundwater investigations have considered geogenic sources with California having a unique geologic framework, including numerous areas of ultrabasi c and serpentinized ultrabasic rocks. These contain abundant Cr and Cr min erals, which when weathered, can undergo transformation in the critica l zone to Cr(VI) complex oxyanions.
The San Francisco Bay Area has several areas where ultrabasic and serpentinized rocks can be observe d, including areas on Mt. Diablo in Contra Costa County and the Ring Mount ain Open Space Preserve (RMOSP) in Marin County. In the critical zone, man y RMOSP soil types derived from the underlying serpentine and ultramafic r ocks are serpentine soils, with unusually high concentrations of iron, chromium, nickel, and cobalt. However, these often are deficient in calcium and have low water holding capacities. Such soils can be very stre ssful for plant growth, consequently forming serpentine barrens c ommonly consisting of open grassland or savannas where the climate would n ormally result in forest growth. Serpentine barrens also result i n unique eco- or model-systems for evolution, ecology, and conservation st udies of rare plant communities. On RMOSP serpentine soils cover about 225 acres.
Groundwater in alluvial aquifers derived from ultrabasic an
d serpentinized terrain can contain Cr(VI) oxyanions, particularly chromat
e (CrO42&ndash\;) and dichromate (Cr2O
&nb sp\;
SPEAKER BIO: \;
strong>
William E. (Bill) Motzer is a registered C alifornia Professional Geologist (PG) and Certified Hydrogeologist (CHG), with PG registrations in five other states. \; Bill has extensive expe rience in conducting surface and subsurface water quality chemistry and en vironmental forensic investigations. Bill is a recognized expert in water quality and forensic geochemistry, with particular expertise in stable and other isotopic &ldquo\;fingerprinting&rdquo\; and age dating techniques, water quality/contaminants, and emerging contaminant geochemistry. He has conducted numerous environmental projects, throughout California and other western states. He is a past President of the San Francisco Bay Branch of the Groundwater Resources Association of California (GRA), past Vice Pres ident for the International Society of Geochemistry and Health, and contri buting editor to the California Section of the American Chemical Society&r squo\;s (ACS) newsletter &ndash\; the Vortex (www.calacs.org).
 \;
ANNOUNCING SCHOLAST IC SPONSORSHIP OPPORTUNITIES:
 \;
All P roceeds to Benefit Science Students
The GRA Sacramento Bra nch has a history of supporting university-level science students. Our Sch olastic Sponsorship Program is an opportunity to publicize your business w hile contributing toward a good cause. \;The cost is minimal\; if inte rested, please contact Ellen Pyatt \;at (916) 852-9118 x 512 or pyatt@geoconinc.com.
 \;
THIS MON TH'S SPONSOR:
ASC Tech Services (ASC) is a professional environmental field services company founded in 19 96 by a Geologist with over 25 years of environmental consulting experienc e. ASC specializes in the implementation of High-Resolution Site Character ization (HRSC) technologies to assist consultants and clients in the under standing of subsurface lithology/hydrogeology and/or contaminant distribut ion in real-time. ASC can acquire HRSC data to determine lithologic/hydrog eologic changes and track contaminants by taking a snapshot of the subsurf ace with minimal disturbance of the subsurface and without generating soil or groundwater wastes. With innovative HRSC technologies, ASC can assist consultants and clients to evaluate a site in one visit, allowing the infi eld professionals to make real-time decisions. Our services are provided w ith geoscientists in the field in order to assist consultant and client pe rsonnel in the interpretation of HRSC data.
ASC provides profession al, cost-effective services globally.
ASC is a State of California Ce rtified Small Business (SB/MB) and Minority Business Enterprise (MBE).
 \;
<
strong>AGENDA:
Social Hour  \;5:30-6:30 p.m.
Ann
ouncements &\; Dinner 6:30-7:30 pm
Presentation 7:30-8:30 pm
Usual great food, including two meat entré\;es, salad, rice
, potatoes, vegetable and Iced Tea. A No-host beer and wine bar will be av
ailable.
MEETING COSTS:
 \;
Questions about the meeting, pl ease telephone Rodney Fricke at (916) 407-8539 or email him at rodneyafricke@gmail.com. Questions about the Sacramento Branch in general, including submittal of your ideas and/o r desires for future presentations, please telephone Linda Bond at (530) 7 57-1500 or email her at Linda.Bon d@water.ca.gov
June 14th: Barry Hecht \;with Balance Hydrologics
, Inc., Post-Fire Effects on Channels and Recharge