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      <SupplementalInformationDetail>
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        <FormAndLineReferenceDesc>SCHEDULE J, PART II, LINE FIVE:</FormAndLineReferenceDesc>
        <ExplanationTxt>IN CALENDAR YEAR 2024, MARY BETH TERRY, PHD WAS AN EMPLOYEE OF COLUMBIA UNIVERSITY. SILENT SPRING INSTITUTE REIMBURSED COLUMBIA UNIVERSITY FOR THE EXECUTIVE DIRECTOR SERVICES MARY BETH PROVIDED TO SILENT SPRING INSTITUTE IN THE AMOUNT OF $76,708. THIS AMOUNT IS REPORTED ON PART VII, SECTION A, COLUMN D. THE TOTAL AMOUNT REIMBURSED TO COLUMBIA UNIVERSITY FOR THE PERIOD OF JULY 1, 2024 TO JUNE 30, 2025 FOR EXECUTIVE DIRECTOR SERVICES IS $153,416 AND IS REPORTED ON LINE 5 OF THE STATEMENT OF FUNCTIONAL EXPENSES (PART IX).</ExplanationTxt>
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      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>FORM 990, PART III, LINE 4A, PROGRAM SERVICE ACCOMPLISHMENTS:</FormAndLineReferenceDesc>
        <ExplanationTxt>FOUNDED IN 1994, SILENT SPRING INSTITUTE IS AN INDEPENDENT SCIENTIFIC RESEARCH ORGANIZATION DEDICATED TO UNCOVERING THE LINKS BETWEEN CHEMICALS IN OUR EVERYDAY ENVIRONMENT AND WOMEN'S HEALTH, WITH A FOCUS ON BREAST CANCER PREVENTION. WITH NEARLY 200 PEER-REVIEWED SCIENTIFIC ARTICLES PUBLISHED TO DATE, WE PROVIDE EVIDENCE TO SUPPORT THE DEVELOPMENT OF SAFER CHEMICALS, SAFER PRODUCTS, AND MORE HEALTH-PROTECTIVE POLICIES. WE HIGHLIGHT HERE SOME OF OUR KEY ACCOMPLISHMENTS DURING THE 2025 FISCAL YEAR. PROGRAM AREA 1 SAFER PRODUCTS: SILENT SPRING CONDUCTS RESEARCH TO EVALUATE CONSUMER PRODUCT SAFETY AND DETERMINE WHETHER PRODUCT SAFETY POLICIES ADEQUATELY PROTECT PUBLIC HEALTH. THIS YEAR: -WE ANALYZED INGREDIENT LISTS FROM MORE THAN 1,000 PERSONAL CARE PRODUCTS USED BY 70 BLACK WOMEN AND LATINAS IN LOS ANGELES OVER THE COURSE OF ONE WEEK AS PART OF THE TAKING STOCK STUDY, A PARTNERSHIP WITH BLACK WOMEN FOR WELLNESS, COLUMBIA UNIVERSITY, AND UC SANTA BARBARA. OUR INITIAL FINDINGS, PUBLISHED IN MAY 2025 AND FEATURED IN THE WASHINGTON POST AND NPR, REVEALED THE WIDESPREAD USE OF CANCER-CAUSING FORMALDEHYDE AND FORMALDEHYDE-RELEASING PRESERVATIVES IN BEAUTY PRODUCTS MARKETED TO WOMEN OF COLOR. OVER HALF OF STUDY PARTICIPANTS USED PRODUCTS CONTAINING THESE CHEMICALS. FOLLOWING PUBLICATION, WE PROVIDED SCIENTIFIC TESTIMONY ON A WASHINGTON STATE BILL THAT WOULD RESTRICT FORMALDEHYDE AND FORMALDEHYDE RELEASERS IN COSMETICS. LOOKING FORWARD, WE WILL CONTINUE TO ANALYZE THIS RICH DATA SET ON PERSONAL CARE PRODUCT USE AMONG WOMEN OF COLOR TO IDENTIFY POTENTIAL HEALTH HAZARDS. -CALIFORNIA'S "PROP 65" LAW REQUIRES BUSINESSES TO WARN CONSUMERS IF A PRODUCT CONTAINS CHEMICALS KNOWN TO CAUSE CANCER, BIRTH DEFECTS, OR REPRODUCTIVE HARM. IN OCTOBER 2024, SILENT SPRING PUBLISHED A STUDY DEMONSTRATING THAT LEVELS OF PROP 65 CHEMICALS IN PEOPLE'S BODIES DECREASED NOT ONLY IN CALIFORNIA BUT ACROSS THE COUNTRY AFTER THE CHEMICALS WERE ADDED TO THE PROP 65 LIST. THIS PAPER WAS FEATURED BY THE LOS ANGELES TIMES AND WAS HAILED AS ONE OF THE TOP FIVE GOOD NEWS STORIES OF 2024 BY ENVIRONMENTAL HEALTH NEWS. IN FEBRUARY 2025, WE PUBLISHED A COMPANION STUDY FOR WHICH WE INTERVIEWED BUSINESS LEADERS AT MAJOR GLOBAL MANUFACTURERS AND RETAILERS. IN THIS STUDY, WHICH WAS FEATURED BY THE WASHINGTON POST AND THE NEW YORK TIMES, 78% OF INTERVIEWEES SAID THAT PROP 65 HAS PROMPTED BUSINESSES TO REFORMULATE PRODUCTS AND 81% OF MANUFACTURERS SAID THEY LOOK TO PROP 65 TO KNOW WHICH CHEMICALS TO AVOID. CRITICS HAVE LONG LOBBIED AGAINST PROP 65 AS OVERLY BURDENSOME AND INEFFECTIVE, AND OUR FINDINGS CHALLENGE THIS NARRATIVE. PROGRAM AREA 2 SAFER CHEMICALS: THROUGH OUR SAFER CHEMICALS PROGRAM, SILENT SPRING IDENTIFIES CHEMICALS THAT INCREASE BREAST CANCER RISK AND CREATES A ROADMAP FOR REDUCING EXPOSURES TO CANCER-CAUSING CHEMICALS. THIS YEAR: -WE CONTINUED TO LEVERAGE OUR JANUARY 2024 LIST OF OVER 900 CHEMICALS LIKELY TO PROMOTE BREAST CANCER DEVELOPMENT. 90% OF THESE CHEMICALS ARE FOUND IN EVERYDAY PRODUCTS. THIS YEAR, THE FOOD PACKAGING FORUM USED OUR LIST TO UNCOVER NEARLY 200 BREAST CANCER RELEVANT CHEMICALS IN FOOD PACKAGING. THEIR FINDINGS WERE FEATURED BY CNN AND NEWSWEEK, AMONG OTHERS. THE NATIONAL INSTITUTES OF HEALTH ARE NOW INCORPORATING OUR LIST INTO THEIR LANDMARK "SISTER STUDY," WHICH TRACKS ENVIRONMENTAL AND GENETIC RISK FACTORS FOR BREAST CANCER AMONG OVER 50,000 SISTERS OF WOMEN WHO HAVE HAD BREAST CANCER. -IN SEPTEMBER 2024, WE PUBLISHED A STUDY IDENTIFYING A DOZEN CHEMICALS THAT PUT FIREFIGHTERS AT INCREASED RISK OF DEVELOPING BREAST CANCER. FOLLOWING PUBLICATION, THE U.S. DEPARTMENT OF LABOR ANNOUNCED CHANGES TO THE FEDERAL EMPLOYEES' COMPENSATION ACT TO INCLUDE BREAST CANCER AS AN OCCUPATIONAL ILLNESS, ENTITLING FIREFIGHTERS TO WORKERS' COMPENSATION, MEDICAL LEAVE, AND MEDICAL EXPENSE COVERAGE. -IN JANUARY 2025, WE PUBLISHED A STUDY DEMONSTRATING THAT NEARLY A THIRD OF PEOPLE IN THE U.S.OVER 97 MILLION PEOPLE HAVE BEEN EXPOSED TO UNREGULATED CONTAMINANTS IN THEIR DRINKING WATER. HISPANIC AND BLACK RESIDENTS ARE MORE LIKELY THAN OTHER GROUPS TO HAVE UNSAFE LEVELS OF CONTAMINANTS IN THEIR DRINKING WATER AND TO LIVE NEAR POLLUTION SOURCES. PROGRAM AREA 3 RIGHT TO KNOW, RIGHT TO ACT: SILENT SPRING IS A NATIONAL LEADER IN THE DEVELOPMENT OF DIGITAL TOOLS AND PROGRAMS THAT EMPOWER INDIVIDUALS TO LEARN ABOUT HARMFUL CHEMICALS IN THEIR EVERYDAY ENVIRONMENTS AND TAKE ACTION. THIS YEAR: -WE CONTINUED TO EVOLVE AND EXPAND OUR DIGITAL EXPOSURE REPORT-BACK INTERFACE (DERBI), AN INNOVATIVE TOOL FOR INFORMING STUDY PARTICIPANTS OF THEIR CHEMICAL EXPOSURES AND INCREASING ENVIRONMENTAL HEALTH KNOWLEDGE. WE SENT OUT OUR LARGEST DERBI REPORT EVER IN FEBRUARY 2025, REACHING THE &gt;3,000 PARTICIPANTS IN THE UNIVERSITY OF ARIZONA'S AZ HEROES STUDY OF FIRST RESPONDERS AND ESSENTIAL WORKERS. -WE LAUNCHED A PROJECT FUNDED BY THE U.S. DEPARTMENT OF HOUSING AND URBAN DEVELOPMENT TO UPDATE OUR HEALTHY HOMES MOBILE APP, WHICH SUPPORTS RESIDENTS IN IDENTIFYING AND ADDRESSING HOME HEALTH HAZARDS. WE WILL TEST THE APP IN HOME VISIT PROGRAMS SUPPORTING FAMILIES WITH YOUNG CHILDREN WHO ARE FACING ENVIRONMENTAL HEALTH CHALLENGES SUCH AS ASTHMA. -IN JUNE 2025, WE LAUNCHED OUR FIRST ANNUAL SILENT SPRING SUMMER INSTITUTE, A WEEK-LONG ENVIRONMENTAL HEALTH CERTIFICATE PROGRAM FOR HIGH SCHOOL STUDENTS. OVER 100 STUDENTS FROM THE U.S. AND BEYOND JOINED OUR INAUGURAL PROGRAM. THE YEAR IN REVIEW: -IN JULY 2024, WE WELCOMED DR. MARY BETH TERRY, AN INTERNATIONALLY RENOWNED CANCER EPIDEMIOLOGIST, AS OUR NEW EXECUTIVE DIRECTOR. DR. TERRY COMES TO SILENT SPRING FROM COLUMBIA UNIVERSITY, WHERE SHE LEADS THE COMMUNITY OUTREACH PROGRAM AT COLUMBIA'S CANCER CENTER AND ALSO LEADS THE INTERNATIONAL BREAST CANCER FAMILY REGISTRY, WHICH TRACKS OVER 15,000 BREAST CANCER FAMILIES WORLDWIDE. -WE PUBLISHED 10 SCIENTIFIC ARTICLES IN PEER-REVIEWED JOURNALS. SEVEN OF THESE ARTICLES RANKED IN THE TOP 1-2% OF ALL RESEARCH OUTPUTS SCORED BY ALTMETRICS, WHICH MEASURES THE ATTENTION RESEARCH STUDIES RECEIVE. COLLECTIVELY, THESE ARTICLES WERE VIEWED OVER 50,000 TIMES AND WERE MENTIONED BY MORE THAN 270 NEWS OUTLETS, INCLUDING THE WASHINGTON POST, THE NEW YORK TIMES, THE LOS ANGELES TIMES, CNN, NPR, THE GUARDIAN, THE HILL, CONSUMER REPORTS, AND NATIONAL GEOGRAPHIC. -OUR SCIENTISTS PRESENTED AT OVER SIXTY NATIONAL CONFERENCES, WORKSHOPS, WEBINARS, AND COMMUNITY MEETINGS, REACHING OVER 3,000 INDIVIDUALS. -IN DECEMBER 2024, SILENT SPRING SCIENTIST DR. LAUREL SCHAIDER WAS ONE OF TWO NATIONAL EXPERTS INVITED TO TESTIFY BEFORE THE U.S. SENATE ON THE HEALTH EFFECTS OF PFAS. TO DATE, SILENT SPRING HAS PROVIDED SCIENTIFIC TESTIMONY ON OVER 70 FEDERAL AND STATE BILLS AND PROPOSED RULES. -THIS YEAR, WE LAUNCHED A NEW RESEARCH PROGRAM TO INVESTIGATE HOW TOXIC CHEMICAL EXPOSURES ARE CONTRIBUTING TO THE GROWING INCIDENCE OF BREAST CANCER AMONG WOMEN UNDER 50.</ExplanationTxt>
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        <FormAndLineReferenceDesc>FORM 990, PART VI, SECTION B, LINE 11B</FormAndLineReferenceDesc>
        <ExplanationTxt>A COPY OF THE FORM 990 IS DISTRIBUTED TO THE CHAIR OF THE BOARD, THE CLERK OF THE BOARD, AND THE EXECUTIVE DIRECTOR FOR REVIEW AND APPROVAL. IT IS THEN SHARED WITH THE REMAINING BOARD MEMBERS BEFORE IT IS FILED WITH THE IRS.</ExplanationTxt>
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      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>FORM 990, PART VI, SECTION B, LINE 12C</FormAndLineReferenceDesc>
        <ExplanationTxt>SILENT SPRING INSTITUTE ANNUALLY DISTRIBUTES A CONFLICT OF INTEREST QUESTIONNAIRE TO BE COMPLETED AND RETURNED BY ALL KEY EMPLOYEES AND BOARD OF DIRECTOR MEMBERS. IF A POTENTIAL CONFLICT IS IDENTIFIED, THE BOARD OF DIRECTORS DETERMINES WHETHER A MATERIAL CONFLICT EXISTS AND, IF SO, WHAT FURTHER ACTION SHOULD BE TAKEN. PERSONS WITH A POTENTIAL CONFLICT SHALL NOT PARTICIPATE IN DISCUSSIONS OR DECISIONS REGARDING WHETHER A MATERIAL CONFLICT EXISTS. PERSONS WITH AN IDENTIFIED MATERIAL CONFLICT SHALL NOT PARTICIPATE IN DISCUSSIONS AND DECISIONS RELATED TO THE RESOLUTION OF THE CONFLICT.</ExplanationTxt>
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        <FormAndLineReferenceDesc>FORM 990, PART VI, SECTION B, LINE 15</FormAndLineReferenceDesc>
        <ExplanationTxt>THE EXECUTIVE DIRECTOR'S SALARY IS REVIEWED AND APPROVED BY THE BOARD OF DIRECTORS AT EXECUTIVE SESSION MEETINGS. SALARIES OF ALL EMPLOYEES INCLUDING THE EXECUTIVE DIRECTOR ARE DETERMINED BASED ON FAIRNESS WITHIN SILENT SPRING AND COMPARABILITY TO OTHER ORGANIZATIONS. ALL DECISIONS REGARDING COMPENSATION ARE DOCUMENTED IN WRITING.</ExplanationTxt>
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      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>FORM 990, PART VI, SECTION C, LINE 19</FormAndLineReferenceDesc>
        <ExplanationTxt>GOVERNING DOCUMENTS, POLICIES AND STATEMENTS ARE AVAILABLE TO THE PUBLIC UPON REQUEST.</ExplanationTxt>
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